Maeda MK3053C Operation Manual

Mini-crawler crane

Table of Contents

Quick Links

Download this manual

OPERATION MANUAL

MINI-CRAWLER CRANE

Serial No. K0001 and up

Unsafe use of this machine may cause serious injury or death. Operators must read

this manual before operating this machine. This manual should be kept near the

machine for reference and periodically reviewed by all personnel who will come into

contact with it.

MAEDA has Operation Manuals written in some other languages. If a foreign language

manual is necessary, contact your local distributor for availability.

WARNING

NOTICE

201E-OM2407-00

Table of Contents

Troubleshooting

Need help?

Do you have a question about the MK3053C and is the answer not in the manual?

Questions and answers

Summary of Contents for Maeda MK3053C

Page 1 This manual should be kept near the machine for reference and periodically reviewed by all personnel who will come into contact with it. NOTICE MAEDA has Operation Manuals written in some other languages. If a foreign language manual is necessary, contact your local distributor for availability.
Page 3: Table Of Contents
3.1.1.2 Usage Temperature, Storage Temperature, Humidity ....3-3 3.1.2.1 Transmitter ................. 3-4 3.1.2.2 Receiver ..................3-4 3.1.2.3 Battery ..................3-4 DIMENSIONAL DRAWINGS ..................3-5 RATED TOTAL LOAD CHARTS ................3-7 3.3.2.1 Boom Length ................3-9 3.3.2.2 Jib Length................. 3-10 MK3053C...
Page 4 Control section descriptions ............. 4-15 MONITOR ........................ 4-16 4.2.5.1 Screen during travel operation ..........4-33 4.2.5.2 Screen during outrigger operation ........... 4-33 REMOTE CONTROL ....................4-34 4.3.2.1 Display parts ................4-39 4.3.2.2 Status screen ................4-40 4.3.2.3 Operations on the display ............4-43 MK3053C...
Page 5 PRECAUTIONS ON WORK SITE ................5-2 PREPARING FOR USING RADIO CONTROLLER ..........5-5 STARTING AND STOPPING THE TRANSMITTER ..........5-8 STARTING THE MACHINE ..................5-10 5.4.2.1 Starting the machine ..............5-11 5.4.2.2 Starting by radio controller ............5-12 5.4.3.1 Starting the machine ..............5-12 MK3053C...
Page 6 When outrigger has moved during operation ......5-33 5.7.3.1 Setting outriggers by automatic set-up using S4 lever .... 5-34 5.7.3.2 Setting each outrigger individually ........... 5-34 5.7.4.1 Stowing outriggers automatically using S4 lever ..... 5-38 5.7.4.2 Stowing each outrigger individually ......... 5-38 MK3053C...
Page 7 5.8.14.2 Jib—Single-fall hook block specification ......... 5-67 5.8.14.3 Stowing the jib in the lateral direction of the machine ..... 5-73 5.8.14.4 Boom—4-fall hook block specification ........5-73 CHANGING CRANE OPTIONS ................5-74 5.10 BATTERY CHARGING (BATTERY SPECIFICATION) ........... 5-99 MK3053C...
Page 8 Chapter 6 MAINTENANCE PRECAUTIONS ................6-2 BASIC MAINTENANCE ................... 6-10 LEGAL INSPECTION ....................6-13 PARTS REPLACEMENT ..................6-14 USE OF FUEL AND LUBRICATING OIL ..............6-16 FUSES ........................6-18 FUSIBLE LINKS ....................... 6-20 CONTROLLERS ...................... 6-21 COVERS ........................6-22 MK3053C...
Page 9 Cautions when charging the battery ........6-100 6.14.4.2 Starting up using a booster cable .......... 6-101 6.14.5.1 Lithium-ion battery usage cautions ........6-102 6.14.5.2 Cautions when charging the lithium-ion battery ....6-103 6.14.5.3 Action when the lithium-ion battery is drained ....... 6-103 MK3053C...
Page 10 6.14.11.1 Preparations for the cold ............6-109 6.14.12.1 Preparations for the cold ............6-110 6.15 TROUBLESHOOTING ................... 6-111 6.15.8.1 Before troubleshooting ............6-119 6.15.8.2 Radio-controller device defects ..........6-120 6.16 DISPLAY OF ERROR CODES AND WARNINGS ..........6-123 MK3053C viii...
Page 11: Chapter 1 Introduction
Chapter 1 INTRODUCTION...
Page 12 Such changes may affect the machine understand the procedures for machine operation, maintenance procedure. Always obtain the inspection, and maintenance before using this latest information from Maeda or our sales machine. service agency before carrying out Failure to observe the basic precautions maintenance on this machine.
Page 13: Safety Information
Contact the relevant government office or our  sales service agency for further information. This denotes useful information. MK3053C...
Page 14: Machine Introduction
Boom slewing motion is determined with the machine viewed from directly above; slew clockwise (right) denotes right-handed motion and slew counter clockwise (left) denotes left-handed motion. The main components of this machine are the travelling dolly and crane. MK3053C...
Page 15: Crane Overview
• Hydraulic safety valve • Hydraulic automatic locking device • Wire rope latch, an alarm buzzer • Level gauge • Crane tip-over alarm (an alarm issued in the event of crane operation at 3-degree inclination and travelling at 10-degree inclination) MK3053C...
Page 16 Refers to the vertical angle between the boom and the horizon. [9] Tip Height Refers to the vertical distance from the ground to [7] Jib Derricking Angle the boom tip or jib tip. Refers to the vertical angle between the jib and the horizon. MK3053C...
Page 17: Remote Control System Introduction
• If communication is interrupted during operation (due to poor reception or being out of radio range, for example), traveling and crane operation stops and the display indicates that radio communication has been lost to prevent erroneous operation or malfunctions. MK3053C...
Page 18: Running-In Operation
• Be sure to allow the hydraulic equipment to warm up after starting the machine. Refer to "5.5 OPERATION ANDPRECAUTIONS AFTER THE MACHINE STARTS". • Avoid overloading or operating at high speeds. • Avoid sudden starting, sudden acceleration, unnecessary sudden stops, and sudden steering maneuvers. MK3053C...
Page 19: Chapter 2 Safety
Chapter 2 SAFETY...
Page 20: Basic Cautions
• Adhere to the stipulated rated total load and working range when operating the machine. • Never operate the machine unless fully attentive, never drive the machine aggressively, and never operate the machine beyond its capabilities. • Always remove the starter key when leaving the operator’s seat. MK3053C...
Page 21 (Engine specification / Engine and electric specification) This machine uses diesel fuel. Be especially careful to check for fuel leaks. • Before leaving the machine, lower the hoisted load to the ground, stop the machine, and remove the starter key. MK3053C...
Page 22 • When washing or steam-cleaning the machine, make sure water does not splash directly onto its electrical devices. Water entering the electrical system may cause electrical equipment to malfunction, causing the machine to operate unexpectedly or resulting in serious personal injury. MK3053C...
Page 23 Do not weld or use gas cutting equipment on pipes or tubes containing flammable liquids. Store fuel and oil in a designated well-ventilated location and prevent unauthorized access. Move flammable materials to a safe place before using grinding or welding tools on the machine. MK3053C...
Page 24 Fully tighten the battery cap. If the electrolytes are frozen, do not charge battery or start the engine using another power source. Such act may cause the battery to catch fire. MK3053C...
Page 25 (-) charge clip to (-) terminal of the battery. Set the charge current to no more than 1/10 of the rated capacity of the battery, or, in case of quick charge, set to the rated capacity of the battery or smaller. MK3053C...
Page 26 Otherwise there is a risk Inspect the tools and protective equipment of damage due to fluid leakage, overheating, before use to make sure they are not rupture, or fire. damaged. MK3053C...
Page 27 Electrolyte solution leakage If electrolyte leakage is suspected (e.g., if the exterior is cracked or damaged, bulging or deformed, discoloured or corroded, or if there is an acrid smell), move the battery away from any open flames and stop using it. MK3053C...
Page 28: Other Cautions
2.1.6 Other Cautions units Cautions regarding becoming trapped • Maeda can accept no liability for any personal injury, failures, or property damage caused by The gaps around the slewing part and crane unit the use of unauthorized attachments or optional vary depending on the movement of the derricking units.
Page 29: Safety Label Locations
CAUTION indicates a hazardous situation that, if not avoided, could result in minor or moderate injury NOTICE is used to address practices not related to physical injury Safety Instruction (or equivalent) signs indicate specific safety-related instructions or procedures MK3053C 2-11...
Page 30 Mini-Crawler Crane 2.2 SAFETY LABEL LOCATIONS M A E D A (Machine body safety label locations (1/5)) MK3053C 2-12...
Page 31 Mini-Crawler Crane M A E D A 2.2 SAFETY LABEL LOCATIONS (Machine body safety label locations (2/5)) *1: Only for Engine specification / Engine and electric specification *2: Only for Engine and electric specification MK3053C 2-13...
Page 32 Mini-Crawler Crane 2.2 SAFETY LABEL LOCATIONS M A E D A (Machine body safety label locations (3/5)) *1: Only for Engine specification / Engine and electric specification MK3053C 2-14...
Page 33 Mini-Crawler Crane M A E D A 2.2 SAFETY LABEL LOCATIONS (Machine body safety label locations (4/5)) MK3053C 2-15...
Page 34 Mini-Crawler Crane 2.2 SAFETY LABEL LOCATIONS M A E D A (Machine body safety label locations (5/5)) MK3053C 2-16...
Page 35 Mini-Crawler Crane M A E D A 2.2 SAFETY LABEL LOCATIONS [1] 201-4883800 [2] 201-4883900 [3] 200-4651500 MK3053C 2-17...
Page 36 Mini-Crawler Crane 2.2 SAFETY LABEL LOCATIONS M A E D A [4] 350-4539700 [5] 584-4581700 [6] 103-4592500 [7] 102-4793700 [8] 201-4886600 [9] 201-4886700 MK3053C 2-18...
Page 37 Mini-Crawler Crane M A E D A 2.2 SAFETY LABEL LOCATIONS [10] 201-4892900 [11] 201-4893000 MK3053C 2-19...
Page 38 Mini-Crawler Crane 2.2 SAFETY LABEL LOCATIONS M A E D A [12] 200-4660100 [13] 201-3515900 MK3053C 2-20...
Page 39 Mini-Crawler Crane M A E D A 2.2 SAFETY LABEL LOCATIONS [14] 201-3515800 [15] 201-4883700 [16] 102-4792900 MK3053C 2-21...
Page 40 Mini-Crawler Crane 2.2 SAFETY LABEL LOCATIONS M A E D A [17] 201-3507300 MK3053C 2-22...
Page 41 Mini-Crawler Crane M A E D A 2.2 SAFETY LABEL LOCATIONS [18] 201-3507000 [19] 106-4855400 MK3053C 2-23...
Page 42 Mini-Crawler Crane 2.2 SAFETY LABEL LOCATIONS M A E D A [20] 103-4592100 [21] 103-4590900 MK3053C 2-24...
Page 43 Mini-Crawler Crane M A E D A 2.2 SAFETY LABEL LOCATIONS [22] 103-4613000 [23] 103-4591700 [24] CL000200010 [25] 201-4897000 [26] 201-4887900 MK3053C 2-25...
Page 44 Mini-Crawler Crane 2.2 SAFETY LABEL LOCATIONS M A E D A [27] 103-4591200 [28] 103-4590200 [29] 201-4885900 [30] 353-4488600 [31] 106-4860200 MK3053C 2-26...
Page 45 Mini-Crawler Crane M A E D A 2.2 SAFETY LABEL LOCATIONS [32] 103-4590800 [33] 103-4590500 [34] 106-4855300 [35] 349-4421900 [36] 103-4589500 [37] 103-4589600 MK3053C 2-27...
Page 46 Mini-Crawler Crane 2.2 SAFETY LABEL LOCATIONS M A E D A [38] 103-4604800 [39] 103-4604900 [40] 201-2249000 [41] 201-4887700 MK3053C 2-28...
Page 47 Mini-Crawler Crane M A E D A 2.2 SAFETY LABEL LOCATIONS [42] 585-4714800 [43] 201-4888700 [44] 102-4880700 [45] 201-4887300 (engine and electric [46] 201-4887400 (battery specification) specification) MK3053C 2-29...
Page 48 Mini-Crawler Crane 2.2 SAFETY LABEL LOCATIONS M A E D A [47] 102-4850600 [48] 102-4848800 [49] 201-3500600 [50] 102-4788200 [51] 102-4798400 MK3053C 2-30...
Page 49 Mini-Crawler Crane M A E D A 2.2 SAFETY LABEL LOCATIONS [52] 102-4848700 [51] 102-4792300 MK3053C 2-31...
Page 50 Mini-Crawler Crane 2.2 SAFETY LABEL LOCATIONS M A E D A [53] 201-4894700 [54] 103-4589600 [55] 103-4592400 [56] 201-4888000 MK3053C 2-32...
Page 51 Mini-Crawler Crane M A E D A 2.2 SAFETY LABEL LOCATIONS [57] 201-4895500 [58] 201-4900400 MK3053C 2-33...
Page 52 Mini-Crawler Crane 2.2 SAFETY LABEL LOCATIONS M A E D A [59] 553-4267700 [60] 553-4267300 MK3053C 2-34...
Page 53: Chapter 3 Specifications
Chapter 3 SPECIFICATIONS...
Page 54: Main Specifications
Crawler ground length x width 950mm x 180mm Gauge width 780mm - 1,050mm Ground pressure 83.4kpa [0.85kgf/㎠] Engine Model KUBOTA Z482-E4B (MK3053CW,MK3053CWE) Displacement 0.479L [479cc] Rated output 7.2kw/2,600min¯¹ [9.8ps/2,600rpm] Fuel Diesel Electric Motor (MK3053CWE) Motor type Totally enclosed fan-cooled motor 4.0kw, 4P 380V(200-415V) MK3053C...
Page 55: Usage Temperature, Storage Temperature, Humidity
Working status lamp, Radio remote control lamp 3.1.1.2 Usage Temperature, Storage Temperature, Humidity Specification Usage temperature (℃) Storage temperature (℃) Humidity (%) MK3053CW, -15 °C to +40 °C -20 °C to +60 °C MK3053CWE MK3053CWB -20 °C to +40 °C -20 °C to +55 °C MK3053C...
Page 56: Transmitter
10 V to 30 V DC Battery type BA405000 (Lithium ion) Battery capacity 6 Ah Continuous operating time Approximately 20 hours Charging time Less than 5 hours Operating temperature 0 °C to 45 °C Housing materials Plastic Charging voltage 4.2 V MK3053C...
Page 57: Dimensional Drawings
M A E D A Mini-Crawler Crane 3.2 DIMENSIONAL DRAWINGS DIMENSIONAL DRAWINGS 3.2.1 Machine Body MK3053C Standard Specification DUMMY MK3053C...
Page 58 3.2 DIMENSIONAL DRAWINGS M A E D A Mini-Crawler Crane 3.2.2 Outrigger Width Dimensional Drawing Standard rotation angle DUMMY Other than the standard rotation angles MK3053C...
Page 59: Rated Total Load Charts
“Jib angle” column one smaller. • When the crane is used with the outriggers extended other than at maximum extension, crane operation should proceed with respect to the values specified on the monitor's working range display. MK3053C...
Page 60 The angle displayed is the jib angle. When in the jib mode, R.R 0.0° is displayed, but this value is not used. (There is no change, but this is normal.) When there is a 4-fall hook block, the R.R at that time is displayed. MK3053C...
Page 61: Boom Length
If boom (2) is extended even by a small amount, work within the capacity indicated in this column. 3. “6.67 m Boom”: the second label ( mark) of boom (3) is half visible. When the first label ( mark) is exposed halfway from boom (2), work within the capacity of this column. MK3053C...
Page 62: Jib Length
Check the number of sections of the jib from the home screen of the monitor and the label ( mark) of the side of the jib (2). Refer to “4.2.2 Home screen” regarding the home screen of the monitor. 1. “2.27 m Jib”: all the jibs are retracted. 3-10 MK3053C...
Page 63 If the jib is extended even by a small amount, work within the capacity indicated in this column. 3. “4.81 m Jib”: all the jibs are fully extended. When the label ( mark) is exposed half way from jib (2), work within the capacity of this column. MK3053C 3-11...
Page 64 85° 55° 0° 90° 85° 55° 0° Boom angle 85° 1000 1000 1000 1000 1000 1000 710 605 1000 67° 1000 1000 1000 1000 1000 1000 710 605 1000 45° 1000 1000 1000 1000 710 605 1000 0° 3-12 MK3053C...
Page 65 90° 85° 55° 0° 90° 85° 55° 0° 90° 85° 55° 0° Boom angle 85° 1000 1000 1000 1000 1000 680 605 1000 67° 1000 1000 1000 1000 680 590 1000 55° 445 335 40° 205 155 0° MK3053C 3-13...
Page 66 85° 55° 0° 90° 85° 55° 0° Boom angle 85° 1000 1000 1000 1000 1000 1000 710 605 1000 67° 1000 1000 1000 1000 1000 1000 710 605 1000 45° 1000 1000 1000 1000 710 560 1000 0° 3-14 MK3053C...
Page 67 4.81 m Jib Jib angle 90° 85° 55° 0° 90° 85° 55° 0° 90° 85° 55° 0° Boom angle 85° 1000 1000 1000 1000 1000 1000 710 605 1000 45° 1000 1000 1000 1000 710 605 1000 0° MK3053C 3-15...
Page 68 2.27 m Jib 3.54 m Jib 4.81 m Jib Jib angle 90° 85° 55° 0° 90° 85° 55° 0° 90° 85° 55° 0° Boom angle 85° 1000 1000 1000 1000 1000 680 605 1000 67° 455 290 55° 40° 0° 3-16 MK3053C...
Page 69 2380 2000 1450 2865 2570 2380 2000 1450 2.19 2715 2570 2380 2000 1450 2405 2205 2000 1450 2030 1940 1755 1450 1735 1705 1545 1450 1500 1490 1360 1255 1300 1200 1100 1130 1060 5.81 7.62 9.43 MK3053C 3-17...
Page 70 2000 1450 2980 2570 2380 2000 1450 2865 2570 2380 2000 1450 2.19 2715 2570 2380 2000 1450 2330 2140 2000 1450 2000 1805 1645 1450 1720 1525 1380 1210 1490 1290 1165 1025 1085 5.81 7.62 9.43 3-18 MK3053C...
Page 71 1450 2980 2570 2380 2000 1450 2980 2570 2380 2000 1450 2865 2570 2380 2000 1450 2.19 2715 2265 2165 2000 1450 1905 1875 1670 1450 1515 1510 1295 1125 1265 1225 1045 1085 1005 5.81 7.62 9.43 MK3053C 3-19...
Page 72: Working Radius / Lifting Height Diagrams
The rated total load decreases as the working radius increases. Actual crane operation requires planning for work, allowing for sufficient clearance beyond that indicated in the diagram. 3-20 MK3053C...
Page 73 • The working range when the jib is unmounted (when 4-fall hook block is attached) is expressed in blue characters above of the name plate. • Check the name plate for the respective working range when the jib is mounted and the jib is unmounted. MK3053C 3-21...
Page 74: Lifting Below Ground Level Diagram
3.4 WORKING RADIUS / LIFTING HEIGHT DIAGRAMS M A E D A Mini-Crawler Crane 3.4.2.2 Lifting Below Ground Level Diagram 3-22 MK3053C...
Page 75: Chapter 4 Component And Functions
Chapter 4 COMPONENT AND FUNCTIONS...
Page 76: Machine Component
Mini-Crawler Crane 4.1 COMPONENT M A E D A COMPONENT Machine component MK3053C...
Page 77 Left and right battery cover (battery (13) Outrigger specification) (14) Rotary (28) Working status lamp (15) Outer box (29) Radio remote control lamp (16) Inner box (30) User manual box (17) Outrigger foot (18) Slewing device MK3053C...
Page 78 (40) 4-fall hook block (34) Carrier roller (top roller wheel) (41) Jib overwinding detector (35) Variable gauge cylinder (42) Boom overwinding detector (36) Fixed hook (43) Hose guide and cable carrier (37) Jib winch head (44) Stowage bracket (optional) MK3053C...
Page 79: Machine Component Description
[15] Working light (22) This working light illuminates the area surrounding the monitor. [16] Radio controller receiver (23) This is the radio controller receiver. [17] Operating cover (24) This is the cover below the monitor. MK3053C...
Page 80 “5.6.5 Changing the Attaching a 4-fall hook block” or “5.9.12 travelling direction of the machine.” Boom—Detaching a 4-fall hook block.” [25] Variable gauge cylinder (35) This cylinder is for altering the width of the crawler tracks. MK3053C...
Page 81 [33] Stowage bracket (optional) (44) These are brackets for stowing the single-fall hook block, the fixed hook, the jib winch head, and the protection weight when removed. For details, refer to section “4.7.1 Stowage bracket.” MK3053C...
Page 82 Mini-Crawler Crane 4.1 COMPONENT M A E D A Machine component [Battery specification] (1) Battery unit (5) Battery charger (2) Battery charging port (6) Motor (3) Power cable (7) Motor controller (4) Disconnect switch MK3053C...
Page 83 4.1 COMPONENT [Engine specification / engine and electric specification] (8) Hydraulic oil tank (13) Engine (9) Hydraulic oil tank oil refill port (14) Battery (10) Hydraulic oil tank level gauge (11) Fuel tank (12) Fuel tank oil refill port MK3053C...
Page 84 [Engine and electric specification] (15) Power supply box (19) AC power supply breaker (16) Control panel (20) DC power supply breaker (17) Power unit (21) Electric motor power supply lamp (18) Main breaker switch (22) Electric motor control panel malfunction lamp MK3053C 4-10...
Page 85: Machine Component Descriptions
: starts the electric current from the ・LOCK (6) Charging complete lamp (END CHARGE) battery The lamp lights up when charging is completed. [6] Motor (battery specification) (6) This is a motor that converts electrical energy into mechanical energy. MK3053C 4-11...
Page 86 This unit controls the device when the device is : the power is supplied. ・ON driven by the electric motor. : the power supply is cut off. ・OFF ・OPEN/RESET : the power supply box’s door lock is unlocked. MK3053C 4-12...
Page 87 Even if the DC power supply breaker is control panel. always in the ON state, this will not cause : A fault has occurred inside the control any safety problems. ・Lit panel.. ・Unlit : The control panel internals are operating normally. MK3053C 4-13...
Page 88: Control Section
Mini-Crawler Crane 4.1 COMPONENT M A E D A Control section (1) Starter switch (3) Emergency stop switch (2) Horn switch (4) Preheating lamp (engine specification / engine and electric specification) MK3053C 4-14...
Page 89: Control Section Descriptions
This switch is used to sound the horn.  The time the lamp is lit varies depending on ・Sounding of the horn: press the switch. the temperature.  The horn stops sounding when you stop pressing the switch. MK3053C 4-15...
Page 90: Start Screen
・Next, the standby screen is displayed and the display switches to the home screen.  When starting the machine, the battery voltage may suddenly fall depending on the temperature and battery state. In that case, the monitor display may temporarily turn off, but this is not a defect. MK3053C 4-16...
Page 91: Home Screen
(12) Outrigger status display (5) Travel operation switch (13) Moment limiter status display (6) Level gauge (14) Warning display (7) Clock display (15) Fixed hook display (8) Hour meter display (16) Eco mode display (9) Fuel gauge / battery level meter MK3053C 4-17...
Page 92 For details of how to perform the operation, refer The position of the yellow bubble indicates the to “5.12 EMERGENCY OPERATION.” direction in which the machine is tilting. [7] Clock display (7) Displays the set time. [8] Hour meter display (8) Displays cumulative hours of operation. MK3053C 4-18...
Page 93 1 to 20% connected. 21 to 40% 41 to 60% 61 to 80% [12] Outrigger status display (12) Displays the current outrigger status. For details of the display contents, refer to 81 to 100% section “4.2.4 Outrigger status display screen.” MK3053C 4-19...
Page 94 Displays the eco mode status currently set. ・STD : Standard mode ・ECO1 : Eco mode 1 ・ECO2 : Eco mode 2 For details of the eco mode, refer to section “4.2.3 User mode screen [2] Select Eco mode.” MK3053C 4-20...
Page 95 Mini-Crawler Crane M A E D A 4.2 MONITOR User mode screen The user mode screen is displayed by pressing the user mode switch on the home screen. MK3053C 4-21...
Page 96 ・Standard mode : does not limit the number of engine or motor speed. The machine can run at its maximum performance. ・OFF : the alarm does not sound during travelling. : the alarm sounds during travelling. ・ON MK3053C 4-22...
Page 97 If used as is, not only does the machine suffer a negative impact, but also it may lead to danger, so replace the consumable promptly.  It is recommended that the consumable icon display selection (2-5C) is always on. MK3053C 4-23...
Page 98 ・OFF : the set time is displayed. This allows you to set the time, the 24/12H display, and summertime ON/OFF. [Clock setting] Select the date and time you want to set with the adjustment switches (2-7A) , and press the check mark (2-7B). MK3053C 4-24...
Page 99 Press the check mark (2-9A) to display the results. For details of how to conduct the inspection, refer to “6.13.6 [4] Inspecting the outrigger rotation angle.” MK3053C 4-25...
Page 100 The value of the electric current can be raised or lowered with the adjustment switches (2-15A) ▲ or ▼. If the electric current value is increased, the slewing action slows down; and if the electric current value is decreased, the slewing action speeds up. MK3053C 4-26...
Page 101 : when the switch is operated, the ・ON operation sound is produced. For details of the error codes, refer to the section “6.16.3 Monitor error codes.” MK3053C 4-27...
Page 102 [21] Extra Battery Unit (EBU), Main battery selected, Automatic battery changeover (battery specification) (2-21) The user mode screen has 4 pages any for battery spec machine. The items on the 4th page are any available when the EBU is attached. MK3053C 4-28...
Page 103 (5) Outrigger angle set-up lamp 1 (13) Boom and jib stowed lamp (6) Outrigger angle set-up lamp 2 (14) Working range status display (7) Outrigger angle set-up lamp 3 (15) Boom slewing position display (8) Outrigger angle set-up lamp 4 MK3053C 4-29...
Page 104 [OFF] When the outrigger length and, lifting and grounding angle correspond to the stowed state and the outrigger rotation angle corresponds to the stowed state MK3053C 4-30...
Page 105 [Boom and jib horizontal stowage detection] The equipment detects whether the boom and jib have stopped in the horizontal stowing position. The boom angle sensor (1) and the jib angle sensor (2) are used to perform the detection. MK3053C 4-31...
Page 106 The current boom slewing position corresponding to the working range status display is displayed with the same color coding as the working range status display in a fan shape. The light is always off on the outrigger in operation screen. MK3053C 4-32...
Page 107: Screen During Travel Operation
Screen during outrigger operation The screen switches the display when the radio controller is operating the outrigger. (B1) Outrigger status display (B2) Level gauge  The home screen and common contents are omitted. Refer to the section “4.2.2 Home Screen.” MK3053C 4-33...
Page 108: Remote Control
(19) Emergency stop / remote control power specification) OFF switch (8) Radio controller power supply switch (20) Radio controller connection port (9) Empty switch (21) LED light (front) (22) Battery (10) Boom and jib raising switch (overload) (11) Horn switch MK3053C 4-34...
Page 109 (a) Variable gauge widening (b) Variable gauge retracting • In crane mode (a) Winch hoisting down (b) Winch hoisting up • In the outrigger lifting and grounding mode (a) No. 2 outrigger lifted (b) No. 2 outrigger grounded MK3053C 4-35...
Page 110 Press this switch to start or stop the engine or • In the outrigger lifting and grounding mode electric motor. (a) No. 3 outrigger lifted (b) No. 3 outrigger grounded This switch does not function in the battery specification case. MK3053C 4-36...
Page 111 When lowering and stowing the boom/jib with the hook in a stowed state, perform the lowering operation while pressing this switch. When raising the boom/jib from the stowed position when using a single-fall hook block, raise the jib and boom while pressing this switch. MK3053C 4-37...
Page 112 Press this switch to stop the engine or the motor in an emergency. In addition, this is also used when the transmitter’s power supply is turned off. Pressing this switch stops the engine or the motor and simultaneously turns off the transmitter. MK3053C 4-38...
Page 113: Display Parts
This lamp lights up when there is an anomaly in the radio controller main unit or when there is a radio controller communication.  When the transmitter starts, the lamp lights up momentarily, but this is not an anomaly. MK3053C 4-39...
Page 114: Status Screen
(S5) Travel speed low speed / high speed display (S16) Outrigger status display (S6) Boom angle display (S17) Boom and jib stowing display (S7) Boom length display (SA) Start interlock display (S8) Jib angle display (S9) Jib length display (S10) Load factor display (S11) Mode display MK3053C 4-40...
Page 115 During the crane job, the current jib angle is when it is running out of battery. The always displayed. transmitter will shut down a few minutes after this. [9] Jib length display (S9) During the crane job, the current jib length is always displayed. MK3053C 4-41...
Page 116 Even when the crane stops, if the load is press the radio controller power supply swinging, then the figure for the actual load switch. changes.  When the jib is stowed, the correct value is not displayed, but this is not a fault. MK3053C 4-42...
Page 117: Operations On The Display
HBC menu on the left-side display. In this condition, pressing the display operation switch (F) displays the HBC menu. If you press the display operation switch (F) while the guidance is displayed, the setting screen appears on the display. MK3053C 4-43...
Page 118 4.3 REMOTE CONTROL M A E D A [HBC menu] With the HBC menu, the left-side screen displays names and the right-side screen displays symbols. Make different settings and check different statuses with reference to the table below. MK3053C 4-44...
Page 119 [5] Turning on/off the LED light (control panel) Selecting this item and pressing the display operation switch (18) lights up the control panel LED (17). If you press the display operation switch when the LED is lit, the LED is turned off. MK3053C 4-45...
Page 120 Mini-Crawler Crane 4.3 REMOTE CONTROL M A E D A Receiver (1) Receiver (3) Antenna (2) LED Monitor (4) Radio controller cable connection port  The receiver is attached on the left side of the monitor part. MK3053C 4-46...
Page 121 (L2) and the transmitter power supply (L3) are never lit simultaneously. [3] Antenna (3) This is the receiving antenna. [4] Radio controller connection port (4) This is used when the transmitter and the receiver are connected with a radio controller cable. MK3053C 4-47...
Page 122: Moment Limiter (Overload Prevention Device)
Mini-Crawler Crane 4.4 MOMENT LIMITER (OVERLOAD PREVENTION DEVICE) M A E D A MOMENT LIMITER (OVERLOAD PREVENTION DEVICE) Moment limiter structure MK3053C 4-48...
Page 123 (13) Outrigger status detection device (C) Green lamp (less than 90% load factor actuation lamp) (14) Moment limiter override switch (5) Boom length sensor (15) Alarm buzzer (6) Boom angle sensor (7) Jib length sensor MK3053C 4-49...
Page 124: Moment Limiter Operations
If the calculation result is actual load / rated total load = 100% or more, then as well as the alarm being issued, the boom’s dangerous operation is automatically stopped. MK3053C 4-50...
Page 125: Moment Limiter Anomaly Occurrence Message Display
If the crane job is performed with the machine set to a high speed, it is extremely dangerous. For example, the suspended load may swing and overload the machine, causing the machine to tip-over or the boom to break. MK3053C 4-51...
Page 126 • Dangerous lateral crane motion  For details of dangerous lateral crane motions, refer to section “4.4.3.2 [4] Operation to recover from an automatic stop (when a fixed hook/a single-fall hook block is mounted (with the jib mounted)).” MK3053C 4-52...
Page 127 Use this switch only when the boom and jib has stopped automatically after entering the overload area. Do not use this switch to lift loads off the ground under normal conditions. Using this switch to lift loads off the ground may damage the machine or cause toppling or other serious accidents. MK3053C 4-53...
Page 128 4.4 MOMENT LIMITER (OVERLOAD PREVENTION DEVICE) M A E D A  The reference point is the shackle mounting part when the fixed hook is mounted, and the load sheave central part when the single-fall hook block is mounted. MK3053C 4-54...
Page 129 In addition, restoration is not possible unless the load factor is first reduced to the safe area of less than 90% (working status lamp: green). Lower the hook and lower the hoisted load to the ground. Perform a boom retract operation. MK3053C 4-55...
Page 130 Do not use this switch to lift loads off the ground under normal conditions. Using this switch to lift loads off the ground may damage the machine or cause toppling or other serious accidents. MK3053C 4-56...
Page 131: Moment Limiter Display
(13) Lifting height upper limit switch (26) Display of the number of boom sections (14) Boom/jib angle upper limit/lower limit switch (27) Display of the number of jib sections (15) Working radius upper limit switch (28) Over un-winding display MK3053C 4-57...
Page 132 The boom angle refers to the angle between the  When the jib angle is less than -91.5°, the boom and horizontal line. figures are no longer displayed, but this is not an anomaly. MK3053C 4-58...
Page 133 The slew angle refers to the angle through which the boom slews from the stowage position (0°). block) • From the base pin of the jib to the installation part of the shackle at the tip (fixed hook) MK3053C 4-59...
Page 134  Pressing the boom/jib angle upper limit/lower an anomaly. limit switch changes the locations to be regulated. For details, refer to “5.8.13.2 Setting/Cancelling the upper/lower limit of the angle of the boom or jib.” MK3053C 4-60...
Page 135 [15] Display of the number of boom sections (26) Displays the current number of boom sections when the crane is being operated. [16] Display of the number of jib sections (27) Displays the current number of jib sections when the crane is being operated. MK3053C 4-61...
Page 136: Moment Limiter Anomaly Occurrence Display
・The working status lamp blinks red. The alarm issues a continuous “peee” sound. The boom’s dangerous operations stop automatically. D. Limit alarm automatic stop cancellation When an automatic stop has occurred, promptly perform a restoration operation from the overload. MK3053C 4-62...
Page 137 0° (level) and the If the starter switch key is turned to OFF, the outriggers are stowed, the boom and override function is also turned OFF (normal). outriggers will come into contact with each MK3053C 4-63...
Page 138 It also ensures any other operations are not possible. Only when the hook block hoisting up operation, the jib (4) and boom (5) extending and raising operations are performed, the buzzer is continuously sounded, and an overwinding warning is issued. MK3053C 4-64...
Page 139 When the alert buzzer is sounded, immediately move the remote control S2 lever (s2) to the “winch hoist up” side (push to the back) and then lower the hook block (1). MK3053C 4-65...
Page 140: Outrigger- And Crane-Related Safety Device
• After the crane has been put in a stowed state, if the radio controller mode selector switch is set to the position “Outrigger lifting and grounding, extension, rotation mode,” then the outrigger’s setting operation and its stowing operation are possible. MK3053C 4-66...
Page 141: Emergency Control
(7) No. 2 outrigger lifting and grounding lever valve (8) No. 1 outrigger extension and rotation lever (14) No. 1 outrigger extension/rotation switching (9) No. 1 outrigger lifting and grounding lever valve For details of the emergency operations, refer to section “5.12 EMERGENCY OPERATION.” MK3053C 4-67...
Page 142: Description Of Each Emergency Control Section
・Lift: pull the lever up. ・Ground: push the lever down. [2] No. 3 outrigger lifting and grounding lever (2) This is used when lifting and grounding the No. 3 outrigger. ・Lift: pull the lever up. ・Ground: push the lever down. MK3053C 4-68...
Page 143 ・Retract / rotation inward: push the lever outrigger extension/rotation switch valve. down.  When conducting the rotation operation, it is necessary to press the spool of the outrigger extension/rotation switch valve. MK3053C 4-69...
Page 144 (10) whether the rotation action is being performed. The normal state is the extension action state. This is used when operating the right crawler. ・Forward: pull the lever up. ・Backward: push the lever down. MK3053C 4-70...
Page 145: Crane Operation
(13) Slewing break release toggle switch (5) Jib lowering control valve (14) Crane slewing / variable gauge switching (6) Jib raising control valve valve (7) Boom lowering control valve For details of the emergency operations, refer to section “5.12 EMERGENCY OPERATION.” MK3053C 4-71...
Page 146 (13) in the ON state, the crane’s clockwise slewing operation can be performed.  While switching the crane slewing / variable gauge switching valve (14), the variable gauge can be reduced by pressing the valve. MK3053C 4-72...
Page 147 This valve switches between performing the crane slewing action of the counterclockwise (or clockwise) slewing / variable gauge widening (or reducing) control valve and performing the variable gauge action. In the normal state, the crane slewing action is performed. MK3053C 4-73...
Page 148: Options
Mini-Crawler Crane 4.7 OPTIONS M A E D A OPTIONS Stowage bracket (1) Single-fall hook block stowage bracket (3) Protective weight stowage bracket (2) Fixed hook / jib winch head stowage bracket MK3053C 4-74...
Page 149 Fit the fixed hook or jib winch head into the stowage bracket, check that it aligns Align and fit the single-fall hook block so with the pin hole position, and insert the that the stowage bracket fits inside the position pin (b). hook. MK3053C 4-75...
Page 150 (3) and align it to the bolt’s pass-through hole. Fix the stowage bracket and the protective weight with the wing nut and the bolt (d). Slew the boom and confirm that the protective chain does not caught round the radio controller antenna, etc. MK3053C 4-76...
Page 151: Chapter 5 Operation
Chapter 5 OPERATION...
Page 152: Precautions On Work Site
Securing the visibility When you travel or operate the machine with bad visibility, you cannot find obstacles near by or the work site condition, leading to a serious injury. MK3053C...
Page 153 Evacuating people from the area around the machine MK3053C...
Page 154 • When you operate the machine in a work site that may have asbestos dust, be sure to stay upwind of the site. • Do not let unauthorized personnel approach the work site. • Observe the specified rules of the work site and environmental standards. MK3053C...
Page 155: Preparing For Using Radio Controller
To clean the transmitter or receiver, wipe off dirt with a cloth soaked with water or diluted neutral detergent. Do not use alkaline detergent, alcohol, or sprayed detergent. Using them may cause damage on the resin of the device. MK3053C...
Page 156 • Place exposed to extremely cold air or direct to an electric shock or serious accident. cold wind • Place exposed to direct sunlight • Place in front of the exhaust vent of a machine • Place near a heater • Place with high humidity MK3053C...
Page 157 Be sure to power off the transmitter before you move from the radio controller or when you finish work. MK3053C...
Page 158: Starting And Stopping The Transmitter
Press the power switch (2) of the radio controller again while the status screen is displayed. The crane becomes operable if the start interlock state is disengaged.  The start interlock state also takes place when the radio communication is disconnected during operation. MK3053C...
Page 159 Radio Controller Power OFF switch to power off the transmitter. If the transmitter is automatically turned off during the startup of the machine, the monitor displays the same screen as when the emergency stop switch is pressed. But this is not a fault. MK3053C...
Page 160: Starting The Machine
The battery may catch fire and explode. Before you charge the battery or start the machine by a different power source, thaw the battery liquid and confirm that there is no problem such as battery liquid leakage. 5-10 MK3053C...
Page 161 OFF position. • If you make starting operation in cold weather or other conditions that require engine warm-up, engine warm-up starts automatically. Make starting operation again after confirming that the pre-heating lamp becomes off. MK3053C 5-11...
Page 162: Starting The Machine
5.4.3.1 Starting the machine Insert the key in the starter switch, and turn it to the START position. When the machine starts, take your hand off the key. The key automatically returns to the ON position. 5-12 MK3053C...
Page 163: Operation And Precautions After The Machine Starts
• By making a warm-up operation of the hydraulic unit, you can warm the hydraulic Set outriggers with reference to “5.7.3 Setting the outriggers.” oil and circulate it around all operation circuits. Be sure to make a warm-up operation of the hydraulic unit. MK3053C 5-13...
Page 164 Operate the winch simultaneously to adjust the height of the hook block.  When the boom is extended, the hook block is lifted. If the alarm buzzer of the over- winding detector sounds when the main 5-14 MK3053C...
Page 165 Repair the relevant parts if there is retract the jib to the stroke end. (when using any abnormality. the jib) Check the machine behavior in this operation for any abnormality. Repair the relevant parts if there is any abnormality. MK3053C 5-15...
Page 166: Stopping The Machine
Turn the key of the starter switch to the OFF position. The machine stops. Pull out the key of the starter switch. 5.5.3.2 Stopping by radio controller When the machine is in operation, pressing the Engine Start/Stop switch (1) of the transmitter stops the machine. 5-16 MK3053C...
Page 167: Operating The Machine
• When travelling on a bridge or crossing over a structure, check that it can withstand the machine weight beforehand. • When operating the machine where height is restricted (such as in a tunnel, in a building, or MK3053C 5-17...
Page 168: Permissible Water Depth
So, • Always ensure that the machine can be set the travelling speed switch to “Slow", stopped at any time if it slips or becomes pay attention to the left-right balance, and unstable. drive very carefully. 5-18 MK3053C...
Page 169: Precautions When Driving Or Operating The Machine
Touching metal surfaces of the machine in fuel leaks, water leaks, and other issues. Pay freezing conditions may result in skin freezing particular attention to fuel leaks. to the metal surface. MK3053C 5-19...
Page 170 • When it is raining, put up the cover so that  water does not get inside the boom. For details of the operation of extending and retracting the variable gauge, see “5.6.3 Operating the variable gauge.” 5-20 MK3053C...
Page 171 Very slow travelling is possible by selecting 1(d) to 3(b) of the speed selector switch. The travelling speed is the same for 1(d) to 3(b). • Widening: Push the lever forward. • Narrowing: Pull the lever toward you. MK3053C 5-21...
Page 172: Moving Forward
Operate the left and right levers simultaneously. Pull the S1 lever (s1) and S6 lever (s6) toward you slowly to start the machine. The machine tends to be unstable when it has just started to travel, so pay attention to the left-right balance. 5-22 MK3053C...
Page 173: Stops
Do not make a sudden change of the travelling direction whenever possible. Especially, when you make a spin turn, do it after stopping the machine once. Operate the machine using two operation levers as follows. MK3053C 5-23...
Page 174: Changing The Machine Orientation When The Machine Is Stopped
S1 lever (s1) to the  To turn right, press the S6 lever forward to neutral position (B) while holding the S6 turn right while moving forward or press the lever (s6). S6 lever backward to turn right while moving backward. 5-24 MK3053C...
Page 175: Making A Spin Turn On The Spot
“5.6.4 Starting (forward or backward) and stopping the machine.” Stop the machine. For how to stop the machine, see “5.5.3 Stopping the machine (engine specification / engine and electric specification)” or “5.5.4 Stopping the machine (battery specification).” MK3053C 5-25...
Page 176: Operating The Outriggers
When setting the outriggers on soft ground for unavoidable reasons, set a plate of an enough size and strength under the supporting pad of each outrigger and strengthen the ground. 5-26 MK3053C...
Page 177 Slope • Set the outriggers so that the rubber track on the left side is lifted to 50 mm above the ground. MK3053C 5-27...
Page 178: Modes Of Outrigger Setting
These conditions define the maximum extension so pay careful attention to this when of outriggers. performing a working. The figure on the right illustrates the outrigger MAX extension state at standard rotation angle shown at the top of the RTL chart. 5-28 MK3053C...
Page 179: Crane Working Areas Depending On Outrigger Setting Conditions
If you use the crane to lift a load exceeding MAX extension at STD rotation angle, the rated load, the machine may tip-over perform the working at the RTL chart value causing a serious injury. according to the monitor’s working range status display. MK3053C 5-29...
Page 180 • No load • The boom is fully retracted. • Boom stowing position (the position in which the post’s lower section and the machine’s eye mark overlap) • Jib stowed state 5-30 MK3053C...
Page 181: Allowable Slewing Angles And The Applied Rated Total Load Depending On The Outrigger Setting Conditions
• MID: The range from which the outriggers are shortened even slightly from their fully extended position to the MID mark position. • MIN: The range from which the outriggers are shortened even slightly from the MID mark position to the fully retracted position. MK3053C 5-31...
Page 182 MIN extension at STD rotation angle In some cases, this machine can operate even if adjacent front and back outriggers or adjacent left and right outriggers are not set to the OR MAX extension at STD rotation angle. 5-32 MK3053C...
Page 183: When Outrigger Has Moved During Operation
(ground, extension, rotation).  When an outrigger stops at the standard rotation angle, the alarm buzzer beeps. To set the outriggers to the standard rotation angle, operate each of all four outriggers by the lever until the buzzer beeps. MK3053C 5-33...
Page 184: Setting Outriggers By Automatic Set-Up Using S4 Lever
If two outriggers on one side are extended After extending to the maximum, the too rapidly, the machine may tip-over. four outriggers are fully grounded until they touch the ground. 5-34 MK3053C...
Page 185 Out of levers S1 (s1), S2 (s2), S5 (s5), and S6 (s6), push forward the lever of the target Change the mode switch position to outrigger to rotate it to the desired angle. “outrigger ground (c).” Change the mode switch position to “outrigger telescoping (b).” MK3053C 5-35...
Page 186 Change the mode switch position to pushed forward instead of the S3 lever, the “outrigger rotation (a)” or “outrigger same action is possible. extension” to fine-adjust the angle or length of the outrigger. Change the mode switch position to “outrigger ground (c).” 5-36 MK3053C...
Page 187 • Before operating outriggers, be sure to stow the jib and the boom of the crane. (Fully lower the jib and boom or set them to the slewed stowing position.) In other conditions, the outrigger interlock prevents the operation of outriggers. MK3053C 5-37...
Page 188: Stowing Outriggers Automatically Using S4 Lever
The four outriggers rotate to the stowed position. After the outriggers are stowed, return the Lower the machine to the ground using lever S4 lever to the neutral position. S3, S1, S2, S5, or S6. 5-38 MK3053C...
Page 189 Change the mode switch position to outrigger, return the lever to the neutral “outrigger extension (b).” position. MK3053C 5-39...
Page 190 Make idle operation for five minutes, and then turn the key switch OFF or press the Engine Start/Stop Switch (1) of the transmitter. The machine stops. Then, turn the key switch OFF. • Battery specification Turn the key switch OFF. 5-40 MK3053C...
Page 191: Operating The Crane
4-fall hook, so that it does not issue a precaution or alarm even if the wire rope is nearly overloaded. Therefore, the wire rope may break when the load exceeds the rated total load for single-fall hook. MK3053C 5-41...
Page 192 Using it with incorrect display may result in the tip-over or damage of the machine, leading to a serious injury. 5-42 MK3053C...
Page 193 So, take sufficient care when • Check the operation of the brake of the winch. carrying out workings. MK3053C 5-43...
Page 194 20.8 wind. load. From 20.8 to Causes minor damage on 24.5 houses. Roof tiles fall off. From 24.5 to Trees fall. Causes major 28.5 damage on houses. From 28.5 to Causes a wide range of 32.7 damage. 5-44 MK3053C...
Page 195 • Do not use the crane for a purpose other than instructions while performing the operation. its main purpose such as lifting and lowering a Follow the leader's instructions about the way worker. and steps of the operation. Determine the forms of cues, and follow the determined cues. MK3053C 5-45...
Page 196 Pay special attention when you repeat the hoisting and lowering of the hook with a high hydraulic pressure or when you operate the crane while driving the accelerator because the hydraulic oil temperature easily rises. 5-46 MK3053C...
Page 197 • It is prohibited to draw the load sideways or pull the load toward the machine by derricking and telescoping the boom and jib. Never make such an operation. MK3053C 5-47...
Page 198 When slewing the crane, be careful not to have the boom or jib hit an outrigger. 5-48 MK3053C...
Page 199  If the moment limiter override switch is at the ON (override) position, the working status lamp flashes red and the alarm buzzer sounds intermittently to notify the condition. Set the mode switch to “crane operation (a).” MK3053C 5-49...
Page 200: Jib-Fixed Hook Specification
For safety, do not touch the boom during operation. Pull lever S1 (s1) toward you to raise the boom to 40 degrees or above. 5-50 MK3053C...
Page 201: Jib-Single-Fall Hook Block Specification
 If the jib angle is less than -91.5 degrees, it is in the inoperable range. In that case, raise the jib to -91.5 degrees or more. MK3053C 5-51...
Page 202 • When you raise the boom from the stowed position, the boom and jib retract and the jib is lowered for a short time to prevent declining, but this is not a fault. For safety, do not touch the boom during operation. 5-52 MK3053C...
Page 203: Setting Up The Jib In The Lateral Direction Of The Machine
20 degrees or more position quickly. The wire rope sags and it When a single-fall hook block is attached: may cause irregular winding of the winch 25 degrees or more drum. MK3053C 5-53...
Page 204: Derricking The Boom
• Raising: Pull the lever toward you.  The boom derricking speed drops when the boom lengthens, but this is for safe operation and is not a fault. 5-54 MK3053C...
Page 205: Derricking The Jib
• Raising: Pull the lever toward you.  Make derricking operations of the jib as slowly as possible, setting the speed selection rotary switch to micro speed mode. MK3053C 5-55...
Page 206: Telescoping The Boom
In sections also retract at the same time. this condition, the boom does not extend any more even if you make the extension operation. In such a case, retract the boom or lower the hook block by unwinding. 5-56 MK3053C...
Page 207: Telescoping The Jib
(4) upward, the extension of the jib stops. In this condition, the jib does not extend any more even if you make the extension operation. In such a case, retract the jib or lower the hook block by unwinding. MK3053C 5-57...
Page 208: Slewing
 When the ECO mode is enabled, the speed may be restricted even if you set the speed switch to STD and operate the crane by full- lever. 5-58 MK3053C...
Page 209 Restriction statuses are indicated by different colors as follows: • Blue: No restriction configured • Yellow: A restriction setting item being selected (It changes to blue or orange if there is no operation for five seconds.) • Orange: Restriction being configured. MK3053C 5-59...
Page 210: Setting/Cancelling The Upper Limit Of The Height Of The Boom And Jib
The color of the monitor display has been set and if the boom or jib enters the changes to blue, and the upper limit is cancelled. precaution alarm range or the upper or lower limit stop condition, the monitor display flashes orange. 5-60 MK3053C...
Page 211: Setting/Cancelling Working Radius Upper Limit
• When the crane approaches the stop position, the rotation decelerates. • The crane stops at a small distance before the set stopping position. MK3053C 5-61...
Page 212: Checking Settings/Cancel All
While clockwise or counterclockwise angle restriction is set, set the yellow display to show the setting that you want to unset, and then long press the switch. The color of the monitor display changes to blue, and the setting is canceled. 5-62 MK3053C...
Page 213: Stowing The Crane
275 to 280 degrees) Other than the lateral 4.1 m or 2.2 m or direction of the machine more more When there is a slewing-prohibited 4.8 m or 1.6 m or range in the stowing more more direction MK3053C 5-63...
Page 214: Jib-Fixed Hook Specification
• Order 1. Jib retracting 2. Boom retracting 3. Boom raised 4. Jib fully lowered 5. slew 6. Boom lowered 7. Boom and jib automatically stopping in the stowing posture 5-64 MK3053C...
Page 215 40 degrees or more.  With the jib being retracted fully and lowered fully and the boom being retracted fully, if the boom angle becomes lower than 40 degrees, you cannot extend or raise the jib and cannot extend the boom. MK3053C 5-65...
Page 216 Push the S4 lever (s4) forward to lowered the jib fully. Push lever S1 (s1) forward to lowered the boom to the 0-degree (horizontal) position.  The stowing of the jib is finished by step 5. 5-66 MK3053C...
Page 217: Jib-Single-Fall Hook Block Specification
9. The machine is now ready for 2. Hook hoisted (until stowed) automatic stowing. 3. Jib fully lowered 4. Slewing action (as far as the stowing position) 5. Boom lowered 6. Boom and jib automatically stopping in the stowing posture MK3053C 5-67...
Page 218 Lateral 5 to 8 -14 to -17 angle direction of degrees degrees the machine (80 to 85 degrees, 275 to 280 degrees) Other than 40 to 45 -75 to -80 the lateral degrees degrees direction of the machine 5-68 MK3053C...
Page 219 50 degrees or more.  With the jib being retracted fully and lowered fully and the boom being retracted fully, if the boom angle becomes lower than 50 degrees, you cannot extend or raise the jib and cannot extend the boom. MK3053C 5-69...
Page 220 Pull lever S3 (s3) toward you to fully retract the boom.  When you raise the jib, the hook block is lifted. Make the lowering operation from time to time to lower the hook block. 5-70 MK3053C...
Page 221  You cannot lift a load when you operate the winch while using the hook stowing switch, but it is not a fault.  The stowing of the jib is finished by step 9. MK3053C 5-71...
Page 222 • When you lower the boom while the jib head is set in the jib receiver at the front of the post, be careful not to damage the over- winding detection device by touching the jib receiver or other sections. 5-72 MK3053C...
Page 223: Stowing The Jib In The Lateral Direction Of The Machine
0 degree, the main boom may be shifted the lowering operation. from the center due to loosening. Make the hoisting operation simultaneously so that the hook block does not touch the ground or machine. Set the mode switch to “crane operation (a).” MK3053C 5-73...
Page 224: Changing Crane Options
 The figure illustrates the hook block when it is stowed under the tip of the boom.  The stowing of the 4-fall hook block is finished by step 6. 5-74 MK3053C...
Page 225 • Adjust the slew angle of the boom so that it comes to the center of the machine. Find the center position by the eye mark below the post. Position the jib at the center of the machine. Then, operable screen [Jib installing and removing 2/2] appears. MK3053C 5-75...
Page 226 (2) through the handing section of the jib, and fix the sling. boom is not stowed. WARNING Do not make unnecessary operation of the boom or jib and do not travel the machine unnecessarily. 5-76 MK3053C...
Page 227  There are black and gray ties attached on the hydraulic hoses (4). Connect the hoses firmly in accordance with the color and number of ties. There are four types of hoses, each of which MK3053C 5-77...
Page 228 20. Change the jib head with a fixed hook or single-fall hook block in accordance with the work to be done. For how to change them, see “5.9.2 Installing the jib” and “5.9.7 Jib—Attaching a single-fall hook block.” 5-78 MK3053C...
Page 229 User Mode screen appears again. When you select it, confirmation screen [Jib installing and removing 1/2] appears. In the confirmation screen, the posture of the machine and the outrigger grounding conditions are displayed. Select the [✔] switch if the conditions are satisfied. MK3053C 5-79...
Page 230 ・ Raising of the boom (up to 50 degrees) attach them. ・ Lowering the boom (down to 0 degrees) ・ Extending the boom (up to 0.2 m) ・ Retracting the boom ・ Derricking the jib ・ Retracting the jib 5-80 MK3053C...
Page 231 Lower the jib and ground the caster at the tip. Lower the jib little by little to the point at which the boom head and the contact surface of the No. 5 boom tip lower section are about 1 mm to 3 mm apart. MK3053C 5-81...
Page 232 During the No.2 and No.3 outriggers’ operation, pay careful attention so that they don't hit the cable bear on the right side of the boom and length sensor on the left side of the boom. 5-82 MK3053C...
Page 233 To use the single-fall hook block, remove the fixed hook with reference to “5.9.5 Jib— Detaching the fixed hook,” and then attach the jib winch head with reference to “5.9.9 Attaching the jib winch head.” MK3053C 5-83...
Page 234 • Using the machine with the wrong setting may result in a serious accident. • Be sure to check with your own eyes that the selected hook and the actually attached hook block are the same before starting work. 5-84 MK3053C...
Page 235 Never insert your finger in the pin hole. if the fixed hook faces downward. Adjust the position of the hole by sight. CAUTION When you insert or remove the pin, support the hook to prevent the fixed hook from dropping. MK3053C 5-85...
Page 236 If a fixed hook is attached, remove it with reference to “5.9.5 Jib—Detaching the fixed hook.” In the user mode screen, select the wire number selection button. Select the switch for single-fall following the instruction on the screen. 5-86 MK3053C...
Page 237 Grab the wedge socket (14), and insert it so wire rope may result in irregular winding. that the pin hole (16) inside the hook block and the hole of the wedge (17) socket are aligned. Insert the wedge socket pin (18) in the MK3053C 5-87...
Page 238 Retract the boom and jib fully, and set the boom angle to 10 degrees. Unwind the winch to lower the single-fall hook block to the point just above the ground. Lower the single-fall hook block on to the ground by laying down the boom. 5-88 MK3053C...
Page 239 WARNING • Guide the wire by putting your hand on it to prevent irregular winding. • At this time, be careful not to have your hand caught by the wire or sheave. MK3053C 5-89...
Page 240 WARNING • If you select 4-falls or fixed hook, conditions such as the load condition are not set appropriately for the single-fall. • Using the machine with the wrong setting may result in a serious accident. 5-90 MK3053C...
Page 241 Remove the connectors (3). Important • To protect connectors, put (2P gray) plugs on unused connectors. • Connect the connector of the jib winch head to the dummy connector on the side of the cover of the overwinding detector. MK3053C 5-91...
Page 242 “5.9.13 Attaching the boom head.” Remove the plug of the connector at the tip of the boom, and securely insert the connector of the overwinding detector of the boom head until you hear a click. 5-92 MK3053C...
Page 243 Insert the end section of the wire rope (7) through the over-winding detection weight (6) of the overwinding detector. Fix the end of the wire rope to the wedge socket as follows: MK3053C 5-93...
Page 244 Important • Do not operate the winch until the hook block is lifted. • Operating the winch without tension on the wire rope may result in irregular winding. 5-94 MK3053C...
Page 245 Pull out the wire rope from the two wedge socket (3) from the boom head. sheaves at the tip of the boom. 10. Wind up all the removed wire rope up to the point just before the drum. MK3053C 5-95...
Page 246 • Using the machine with the wrong setting may result in a serious accident. • Be sure to check with your own eyes that the selected hook and the actually attached hook are the same before starting work. 5-96 MK3053C...
Page 247 When you insert or remove the position pin, support the boom head to prevent the boom head from dropping. Swap connectors (3). Insert the (8P gray) plugs into (4). Securely insert the boom head harness into (3) until you hear a click. MK3053C 5-97...
Page 248 “5.9.11 Boom—Attaching a 4-fall hook block." Remove the connector (3). Important To protect connectors, put (2P gray) plugs on unused connectors. Remove the linchpin (2), and then remove the position pin (1). 5-98 MK3053C...
Page 249: Battery Charging (Battery Specification)
[1] Monitor display during charging The figure below shows the screen displayed on the monitor when the battery is charged with the starter switch being OFF. (1) User mode switch (3) Input voltage indication (2) Working status lamp ON/OFF switch MK3053C 5-99...
Page 250: Charging Procedure
ON, power is not turned off when charging finishes. Charging starts again when the remaining charge in the lithium-ion battery drops below 50% only in the case when recharge was continued after the remaining charge in the lithium-ion battery reached to 100% once. 5-100 MK3053C...
Page 251 When you pull out the power cable, grab the plug. Do not grab the cable to pull it out. Remove the power cable from the charging port. After removing the power cable, close the lid of the charging port. MK3053C 5-101...
Page 252 • If the angle of the loading plates exceeds 15 degrees, the machine easily becomes unstable. So, set them with a gradient of 15 degrees or less. • Set the loading plates with an interval so that each of them aligns with the center of each crawler. 5-102 MK3053C...
Page 253 • When the machine moves through the end of the loading plates on to the trailer bed, the machine loses balance and becomes dangerous with a sudden movement of its gravity center. Drive the machine very slowly. MK3053C 5-103...
Page 254: Securing The Machine
So, drive forward to the target point carefully, and then stop. Remove the chains and wire ropes used for securing the machine. Start the machine. In cold weather, make warm-up operation well enough. 5-104 MK3053C...
Page 255 • Wire rope: JIS13 or higher, φ12.5 × 1500 mm or more (breaking force: 1.1 t or more) eye lock at one end and 12A-type thimble at the other end • Shackle: BC-16 or SC-16 (breaking force: 7.5 t or more) MK3053C 5-105...
Page 256  Pay attention to changes of the machine posture when it is suspended, and hoist the machine while maintaining it stable. 5-106 MK3053C...
Page 257 • To drive the machine from the monitor, use the driving operation mode screen. travelling operation mode screen appears when you press the driving operation mode switch in the home screen. It cannot be switched to high speed. MK3053C 5-107...
Page 258 Right crawler backwarding switch (7) ・Short press: Returns to the previous page. ・Long press: Returns to the home screen. Backwards the left/right crawler. [2] Left crawler forwarding switch (2) Right crawler forwarding switch (6) Forwards the left/right crawler. 5-108 MK3053C...
Page 259 The basic operations are the same as the steps of setting and stowing from the radio controller described in “5.7.3 Setting the outriggers” and “5.7.4 Stowing the outriggers.” The following is the difference. MK3053C 5-109...
Page 260  For the basic operations of the outriggers, see “5.7 OPERATING THE OUTRIGGERS.”  When the outrigger is operated, the engine or motor speed automatically rises, but this is not a defect. 5-110 MK3053C...
Page 261 (8) No.2 outrigger extend/lower/rotate inward switch (3) No.3 outrigger extend/ground/rotate inward switch (9) No.1 outrigger retract/lift/rotate outward switch (4) No.4 outrigger retract/lift/rotate outward switch (10) No.1 outrigger extend/ground/rotate inward switch (5) No.4 outrigger extend/ground/rotate inward switch (6) Mode change switch MK3053C 5-111...
Page 262 You can retract, lift, and rotate outward the No. 2 outrigger based on the operation mode. [4] No.4 outrigger retract/lift/rotate outward switch (4) You can retract, lift, and rotate outward the No. 4 outrigger based on the operation mode. 5-112 MK3053C...
Page 263 No. 1 outrigger based on the operation mode.  For the basic crane operations, see “5.8 OPERATING THE CRANE.”  When you operate the crane from the monitor, you cannot retract or extend the hook, jib, and boom. MK3053C 5-113...
Page 264 (6) Mode change/Acceleration switch (2) Boom/Jib retract switch (7) Boom/Jib lower switch (3) Boom/Jib extend switch (8) Boom/Jib raise switch (4) Slew clockwise switch (9) Winch hoist up switch (5) Slew counterclockwise switch (10) Winch hoist down switch 5-114 MK3053C...
Page 265 The acceleration switch is not displayed on the outrigger operation screen. So, if you want to change the acceleration level, use the screen for driving operation or crane operation. [4] Slew clockwise switch (4) You can slew the boom clockwise. MK3053C 5-115...
Page 266 You can lower the boom or jib based on the You can hoist down the winch. operation mode. [8] Boom/Jib raise switch (8) You can raise the boom or jib based on the operation mode. [9] Winch hoist up switch (9) You can hoist up the winch. 5-116 MK3053C...
Page 267 • Neutral: Release the lever to let it return to the neutral position. The brake automatically actuates to stop the crawler. • Back: Pull the lever up. After you finish the work, put the operating cover back with reference to “6.9 COVERS.” MK3053C 5-117...
Page 268 • Extend: Push the lever down. • Retract: Pull the lever up. • Neutral: Release the operation lever to let it return to the neutral position. The outrigger stops stowing/extending. 5-118 MK3053C...
Page 269 • Neutral: Release the operation lever to let it return to the neutral position. The outrigger stops rising or lying down. You can rotate an outrigger by the outrigger extension and rotation lever only while the spool of the valve is pressed. MK3053C 5-119...
Page 270  For the basic operations of extending/stowing the crane, see “5.8 OPERATING THE CRANE.” Remove the valve cover on the post. You can remove the valve cover by removing the four bolts on the front of the cover. 5-120 MK3053C...
Page 271 • Hoist up: Press the winch hoist up control valve (A6). • Hoist down: Press the winch hoist down control valve (B6). • Raise: Press the jib raising control valve (A3). • Lower: Press the jib lowering control valve (B3). MK3053C 5-121...
Page 272 • Extend: Press the boom extending control valve (B5). 5.12.3.5 Telescoping the jib Use the control valves for telescoping the jib as follows: • Retract: Press the jib retracting control valve (A2). • Extend: Press the jib extending control valve (B2). 5-122 MK3053C...
Page 273 Confirm that the slewing brake release toggle switch is OFF, and then put the cover back on the right of the control unit. The variable gauge widening / reduction operation can only be performed while the valve’s spool is being pressed. MK3053C 5-123...
Page 274 Use the control valves for clockwise (counterclockwise) slewing / variable gauge stewed (extend) as follows: ・Stewed: press the clockwise slewing / variable gauge stewed control valve (A1). ・Extend: press the counterclockwise slewing / variable gauge extend control valve (B1). 5-124 MK3053C...
Page 275: Connecting Power Supply Cable
(1) of the power supply box are at the OFF position. • Check the area in which you will run the cabtyre cable, and remove any sharp- pointed objects. Otherwise, the cabtyre cable may be MK3053C 5-125...
Page 276 (6) of the breaker switch panel (5) in the original position, and close the door (3) of the power supply box. After you finish power connection, put the engine cover with reference to “6.9 COVERS.” 5-126 MK3053C...
Page 277 Using the machine without repairing it may cause a serious accident. • When you drive the machine, pay careful attention not to have the machine run over or tangle the cabtyre cable. Deploy a guide as necessary, and follow the instructions of the guide. MK3053C 5-127...
Page 278 Repair the machine if there is any oil leak or abnormality. Remove mud adhering to the crawlers and outriggers. Remove withered leaves and paper strips from around the control panel because they may cause fire. 5-128 MK3053C...
Page 279 Precautions for connecting the power supply device also apply when disconnecting it. Set the breaker of the power supply device to the OFF position. Set the breaker switch (1) of the power supply box to the OFF position. Remove the power plug (2). MK3053C 5-129...
Page 280 This Page Intentionally Left Blank...
Page 281: Chapter 6 Inspections And Maintenance
Chapter 6 INSPECTIONS AND MAINTENANCE...
Page 282: Maintenance Precautions
• Attempting to inspect or maintain the Machine whilst still dirty not only lessens chance of locating faults, but may cause rubbish to enter your eye, or slipping and tripping that result in injury. • Always observe the following when washing the vehicle. MK3053C...
Page 283 • Operate each of the crane operation levers back and forth 2 - 3 times to relieve the pressure remaining in the hydraulic circuits. • Apply pawls to prevent rubber tracks from moving. MK3053C...
Page 284: Precautions During Maintenance
• 1 person should stand at the driving operation position on the travel operation panel side, and keep checking each other while ensuring that the engine can be stopped at any time. • Be especially careful when working near a slewing part because you may get entangled. MK3053C...
Page 285 • Directly heating a pressurized piping or rubber hose may cause a sudden snip. Apply a fire protection cover. • Wear protective equipment. • Always ventilate the area. • Keep combustibles away from the area and prepare a fire extinguisher. MK3053C...
Page 286 "OFF" for at least one minute before doing so. If you shut the electricity off by unlocking the disconnect switch while the starter switch is "ON", the information of the machine will not be saved correctly which may lead to an accident. MK3053C...
Page 287 Strictly observe the following. • Do not start any inspection or replacement before the pressure dissipates. • Put on safety goggles and leather gloves. MK3053C...
Page 288 • Checks while machine is running ・ Check that the inspected/maintained parts operate normally. ・ Check that issues such as an oil leak do not occur when load is applied to the oil pressure by increasing the engine or motor rotation. MK3053C...
Page 289 [9] Cautions about contamination • When cleaning, while applying the water, wipe When inspecting or replacing oil, do so in a dust- away mud and dust, etc. with a clean waste free location to prevent contamination. cloth. MK3053C...
Page 290: Basic Maintenance
• Refrain from using an oil other than that When replenishing the oil, replace all of it. recommended by Maeda as it will cause clogging of the filter. It is not a problem if oil in [20] Preparing the footing the quantity that is left in a pipe or cylinder, etc.
Page 291 Kerosene with an extremely low cetane If that is the case, contact us or our sales number has a bad effect on the engine. service agency. MK3053C 6-11...
Page 292 • If oil gets on the electrical parts, be sure to the machine must absolutely not be removed wipe them clean. from the machine or disassembled. • Electrical components other than equipment prepared as options must not be installed. 6-12 MK3053C...
Page 293: Legal Inspection
Confirm the reliability of the operation and stopping of the telescoping, derricking, and slewing movements of the boom and the jib. If defects are discovered when conducting an inspection, contact us or our sales service agency. MK3053C 6-13...
Page 294: Parts Replacement
Replacement frequency Hydraulic piping and crane rotation part Hydraulic piping and crane fixing part P/T line Hydraulic The earlier of every two [engine specification] hose years or 2,000 hours P/T line [engine and electric specification] P/T line [battery specification] 6-14 MK3053C...
Page 295 ✓ Boom extension wire replacement ✓ ✓ Boom retraction wire Wire rope replacement ✓ ✓ Jib extension wire replacement ✓ ✓ Jib telescope wire replacement ✓ ✓  For part replacement, contact us or our sales service agency. MK3053C 6-15...
Page 296: Use Of Fuel And Lubricating Oil
• To maintain the machine in its best condition shown in the table. for a long period, we recommend using the oil, grease, and coolant specified by Maeda in this manual. • If these recommended oils are not used, the...
Page 297 S15 diesel fuel as a substitute for No. 1-D. (1) For the abrasion-resistant hydraulic oil (ISO VG46, VG32, VG22) in the hydraulic oil system, use the oil recommended by Maeda. (2) Only use ISO VG22 during the cold when the engine startup performance is poor. If it is used other than during the cold, the operating lifetime of the winch, etc.
Page 298: Fuses
• When replacing a fuse, be sure to replace it with a blade fuse of the same capacity. [1] Fuse box [common to the engine and the battery] This is installed on the left side of the machine at the bottom of the hydraulic oil tank. 6-18 MK3053C...
Page 299 Upper normal power (13) supply Radio controller power (14) supply Inclination sensor power (15) supply (16) Emergency stop (17) OR slew switching OR extension and manual (18) slewing brake release (19) IOT (ACC) Start signal (20) [engine specification] MK3053C 6-19...
Page 300: Fusible Links
[Fusible link capacity and circuit name] Fuse No. Capacity Connect to Start Main power supply Glow When the following phenomena occur, it may be due to disconnection of the fusible link so check it and replace it, if necessary. 6-20 MK3053C...
Page 301: Controllers
If the engine cover and the left engine cover are taken off, the engine controller installation below the 12 V battery can be confirmed. [2] Sub controller x 2 (I/O unit) Mounted under the cover (controller cover) on the left side of the post. MK3053C 6-21...
Page 302: Covers
Take off the engine cover or the battery cover (1) in the direction of the arrow. [3] Taking off the left/right machinery cover When conducting inspections and maintenance inside the left/ right machinery cover, take off the machinery cover according to the following procedure. 6-22 MK3053C...
Page 303 Remove the fixing bolts (2) of the left engine cover or the left battery cover (1).  Five fixing bolts (2) are used on the surface on the side. MK3053C 6-23...
Page 304: Table Of Inspections And Maintenance
(p.6- ✓ Undercarriage inspection (rubber track, track roller, ✓ sprocket, idler) (p.6-33) Fixed hook inspection (p.6-33) ✓ Wire rope inspection (p.6-33) ✓ Overwinding prevention device inspection ✓ (p.6-34) Winch motor inspection (p.6-34) ✓ 6-24 MK3053C...
Page 305 Wire rope deformation, damage, and wear ✓ inspection (p.6-42) Air cleaner vacuator valve inspection [engine specification / engine and electric specification] (p.6- ✓ Inspection after powering on the transmitter (p.6-43) ✓ Rubber track tension inspection and adjustment ✓ (p.6-43) MK3053C 6-25...
Page 306 Wire rope replacement, inspection, and adjustment ✓ (p.6-58) Wire rope replacement criteria (p.6-58) ✓ Winch wire rope removal (p.6-59) ✓ Winch wire rope installment (p.6-61) ✓ Boom telescoping wire rope inspection (p.6-64) ✓ Boom extending wire rope adjustment (p.6-66) ✓ 6-26 MK3053C...
Page 307 Fuel hose and clamp band inspection [engine ✓ specification / engine and electric specification] (p.6-76) Inspection of oil quantity inside the winch ✓ speed reducer case and replenishment (p.6-76) Engine oil replacement [engine specification / ✓ engine and electric specification] (p.6-77) MK3053C 6-27...
Page 308 Hydraulic oil return filter replacement (p.6-89) ✓ Fan belt replacement (p.6-90) ✓ Valve clearance inspection [engine specification ✓ / engine and electric specification] (p.6-91) Replacement of oil in the hydraulic oil tank ✓ (p.6-91) 6-28 MK3053C...
Page 309 [engine specification / engine and electric specification] (p.6-96) Air cleaner hose replacement [engine ✓ specification / engine and electric specification] (p.6-96) Fuel hose and clamp band replacement [engine ✓ specification / engine and electric specification] (p.6-97) MK3053C 6-29...
Page 310: Inspections
Inspect the electrical wiring for looseness or play and inspect the parts that become hot for the buildup of dust. Perform the contents indicated in this item before initially starting the machine on the first day. 6-30 MK3053C...
Page 311 M A E D A Mini-Crawler Crane 6.11 INSPECTIONS MK3053C 6-31...
Page 312 • If the indicator is at the limit hole position, damage or adhesion of garbage, ice, etc., and make an adjustment according to “6.12.2 [8] repair any defects found. Adjusting the boom retracting wire rope and retracting wire tensioner.” 6-32 MK3053C...
Page 313 • For details of the rubber track, refer to “6.11.3 section “5.8.2 Precautions and prohibitions [1] Inspecting and adjusting the rubber track while operating the crane,” tension” or “6.11.3 [2] Inspecting the rubber track for damage and wear.” MK3053C 6-33...
Page 314 • Check that the hook retainer (1) is functioning normally. Repair the relevant parts if there is any abnormality. 105 mm or 51 mm or less more • If each of the hook dimensions satisfies the replacement criteria, replace the hook. 6-34 MK3053C...
Page 315 If there are abnormalities in the movement of the operating lever or switch, promptly repair them. If there are abnormalities in the operating lever or switch, the crane may behave unexpectedly, and it may cause a serious accident. MK3053C 6-35...
Page 316 Remove the reserve tank’s (2) cap (3), then refill the water from the water refill port until the level is “full.” After replenishing the cooling water, securely attach the reserve tank’s (2) cap (3). Referring to section “6.9 COVERS,” attach the engine cover. 6-36 MK3053C...
Page 317 • The replenished oil requires a certain amount of time to descend to the oil pan, so check the quantity of oil again after five minutes have passed since replenishing the oil. MK3053C 6-37...
Page 318 View the monitor fuel gauge and check the fuel to see if it is full (near “F”). Replenish the engine oil so that it is partway between “H” and “L” on the oil level gauge (1). 6-38 MK3053C...
Page 319 Referring to section “6.13.8 [2] Discharging contaminated water and sediment from inside the fuel tank [engine specification / engine and electric specification],” discharge contaminated water and sediment from the fuel tank. Remove the mesh (5) from the inside of the pot (1). MK3053C 6-39...
Page 320 Stop the machine at a firm level ground. Referring to section “6.9 COVERS,” take off the right machinery cover. 6-40 MK3053C...
Page 321 Referring to section “5.7.4 Stowing the outriggers,” stow the outriggers. Stop the machine on firm level ground. Put the operating cover back with reference Referring to section “5.7.3 Setting the to "6.9 Covers." outriggers,” slew the outrigger’s (4) outrigger rotary to the outside. MK3053C 6-41...
Page 322 Open the air cleaner cover’s vacuator valve (4), After checking and replenishing the oil, remove any garbage, clean it, and repair any securely tighten the oil quantity inspection defects found. plug (2). 6-42 MK3053C...
Page 323 5 to 30 hours, the “initial loosening” will occur. Until the “initial loosening” period has been exceeded, adjust the tension frequently. This prevents “rubber track deviation caused by insufficient tension.” MK3053C 6-43...
Page 324 • When the tension is loose (increasing the tension) • Prepare a grease gun (pump). Remove the two attachment bolts (2) and take off the inspection cover (1). 6-44 MK3053C...
Page 325 (1) Track roller (2) Rubber shoe When the ejection of the grease is poor, perform the following workings to eject the grease. Referring to section “5.7.3 Setting the outriggers,” stow the outriggers and lower the machine to the ground. MK3053C 6-45...
Page 326 • If the rubber track’s core metal (5) has broken away in one place or more, replace with a new item. • Cracks For an item in which cracks (6) have appeared in the rubber track lag, repair it promptly or replace it with a new one. 6-46 MK3053C...
Page 327 • If the engine is run at low speed for a long time, the lubrication of the engine cylinder head will become insufficient and may cause engine malfunction. If using the engine at low speed, rev up the engine for around five minutes once a day. MK3053C 6-47...
Page 328 When doing this, at the same time, confirm that “B.ANGLE” on the display varies according to the boom movement. 6-48 MK3053C...
Page 329 When doing this, at the same time, confirm condition for any defects. that “B.LENGTH” on the display varies When doing this, at the same time, confirm according to the boom movement. that “J.LENGTH” on the display varies according to the jib movement. MK3053C 6-49...
Page 330 In addition, view the monitor display and that the winch drum is winding in an orderly check that the boom slewing position lamp is manner and that each sheave is rotating lit green when the boom is in the stowing smoothly. direction. 6-50 MK3053C...
Page 331 “maximum contracted” jib length, a boom angle of “45°,” and a jib angle of “0.0°.” If there is a difference between the actual measurement value and the moment limiter’s monitor display values, contact us or our sales service agency. MK3053C 6-51...
Page 332 10° or more Confirm that the engine’s exhaust gas is and the eye mark was colorless. In addition, check whether noise aligned and the stowing or vibrations occur. If there are any defects, position set. repair them. 6-52 MK3053C...
Page 333 [13] Engine start and stop operation inspection [engine specification / engine and electric specification] When the engine is stopped, press the engine start / stop switch (7) and confirm that the engine starts. MK3053C 6-53...
Page 334 STD (a), confirm that the engine RPM increases according to the operating lever. Also, when the speed change switch is moved to STD (a) → 3 (b) → 2 (c) → 1 (d), confirm that the maximum speed drops. 6-54 MK3053C...
Page 335: Irregular Maintenance
(4) and the rubber track (5) as in the the undercarriage above the ground. following diagram, turn the sprocket backward. When the rubber track (5) rises above the idler (4) due to the iron pipe, slide it in the horizontal direction and remove it. MK3053C 6-55...
Page 336: Handling Rubber Tracks
Be sure to read “6.12.1.1 [3] Prohibited operations” and “6.12.1.1 [4] Cautions in using Referring to section “6.11.3 [1] Inspecting rubber tracks” before use. and adjusting the rubber track tension,” adjust the tension of the rubber track. 6-56 MK3053C...
Page 337: Warranty
Loose tension will allow the rubber tracks to come off. Keep the following in mind during operation. • Avoid making spin turns on concrete surfaces. Avoid making sudden steering whenever possible, since it will cause early wear or defect on the rubber tracks. MK3053C 6-57...
Page 338 • Within one turn (counting 6 peaks) of the wire rope, when 10% or more of the bare wire of the bare wire (excluding the filler wire) number is disconnected. • 20% or more within 5 turns of the wire rope 6-58 MK3053C...
Page 339 Take off the wire rope according to the following procedure. When removing the winch wire rope, refer to section “5.7.3 Setting the outriggers,” and be sure to set up the outriggers at the maximum extension. Set up the machine on hard, firm level ground. MK3053C 6-59...
Page 340 Turn the Starter Switch to the “OFF” position Repeat the above steps until twisting of the to stop the machine. hook is eliminated. Replace the wire rope with a new one if the twisting is not corrected by the above steps. 6-60 MK3053C...
Page 341 (5) Wire rope (14) Boom snap sheave (6) Protective weight (15) Wire guide (7) Stowing cam (16) Idler (8) Jib winch head top sheave (17) Winch drum (9) Jib winch head snap sheave (18) Rope wedge (for the drum) MK3053C 6-61...
Page 342 When doing this, adjust the length of the wire rope (5) so that the tip of the wire rope (5) does not protrude from the wire attachment hole (a) of the winch drum (9). 6-62 MK3053C...
Page 343 Lay the S1 lever (s1) in front of you to raise the boom so that the hook block is raised until it is lifted from the ground.  Do not operate the winch until the hook block is lifted. MK3053C 6-63...
Page 344 If the retracting wire tension indicator is not aligned with the limit hole position, then an adjustment is necessary. • When making the adjustment, do so with the standard hole position as the target. 6-64 MK3053C...
Page 345 • The No. 2 and No. 3 boom gap (gap (a) in the following diagram) • The No. 3 and No. 4 boom gap (gap (b) in the following diagram) • The No. 4 and No. 5 boom gap (gap (c) in the following diagram) MK3053C 6-65...
Page 346 Fix the adjustment nut (5) of the No. 3 boom extending wire rope with the lock nut (3). Adjust the angle so that the extension Adjusting No. 3 boom extending wire rope wire bracket (6) is horizontal. 6-66 MK3053C...
Page 347 (12) evenly on the left and right in the direction (clockwise) of the extension of the No. 5 extending wire rope (11) up to the point just before the No. 5 boom starts to extend. MK3053C 6-67...
Page 348 Be careful to avoid standard position (the boom rear side overextension as it puts a load on the wire. inspection hole). 6-68 MK3053C...
Page 349 The adjustment of the wire tensioner’s tension when loaded is completed. Do not tighten (loosen) the tensioner’s bolts carelessly. Doing so will change the tension and may lead to sagging of the wire and damage. MK3053C 6-69...
Page 350 If the gaps (a), (b), and (c) are not 3 mm or telescoping wire rope,” make the adjustment. less despite adjusting each extending wire, extend the extending wires and adjust so that the gaps are 3 mm or less. 6-70 MK3053C...
Page 351 Adjusting the No. 3 jib retracting wire rope Loosen the lock nut (1), then tighten the adjustment nut (3) evenly left and right in the direction (clockwise) in which the No. 3 jib retracting wire rope (2) extends until gap (a) is zero. MK3053C 6-71...
Page 352: Regular Maintenance
[4] Fan belt tension inspection and adjustment [engine specification / engine and electric specification] For details of how and where the maintenance is conducted, refer to section “6.13.5 [4] Fan belt tension inspection and adjustment [engine specification / engine and electric specification].” 6-72 MK3053C...
Page 353 Total of 1 Variable gauge cylinder rod side attachment pin 1 places each Lithium grease Variable gauge cylinder bottom attachment pin Slewing bearing Total of 2 places Slewing gear Outer circumference Single-fall hook block 1 places each 4-fall hook block MK3053C 6-73...
Page 354 When applying grease to both sides and the bottom of the boom and to the wire rope, referring to section “5.8.9 Telescoping the boom,” extend the boom. In order to prevent wear and rusting of the wire rope, apply rope grease. When applying the grease, first remove dirt from the rope surface. 6-74 MK3053C...
Page 355 M A E D A Mini-Crawler Crane 6.13 REGULAR MAINTENANCE [Greasing part details] MK3053C 6-75...
Page 356 (2) and the clamp band (1) are worn or damaged, replace or repair them simultaneously, referring to the section “6.13.14[3] Fuel hose and clamp band replacement [engine specification / engine and electric specification].” Referring to section “6.9 COVERS,” re- attach the engine cover. 6-76 MK3053C...
Page 357 After replenishing the oil, tighten the oil Stop the machine on firm level ground. quantity inspection plug (G) securely. Referring to section “5.7.3 Setting the outriggers,” set the outriggers and raise the machine to a convenient height for the job. MK3053C 6-77...
Page 358 • When cleaning the element, do not tap it or knock it with anything. • Do not use damaged items for the element’s fold, gasket, or seal. • If the element is damaged despite the replacement period not being reached, replace it with a new item. 6-78 MK3053C...
Page 359 Install it so that the TOP position of the more from the inside. dustpan (3) is at the top, then fix it with the clamps (6) (two places). Referring to section “6.9 COVERS,” re- attach the engine cover. MK3053C 6-79...
Page 360 Stop the machine on firm level ground. Referring to section “6.9 COVERS,” take off Loosen the bottom bolt (4) and the the engine cover. adjustment bolt (5). Check that there are no scratches and cracks in the cooling fan blades (1). 6-80 MK3053C...
Page 361 • When replenishing the oil, be careful that garbage, etc. does not enter from the oil refill port. • Do not overtighten as the engine oil filter cartridge packing may deform. • Discharged oil receptacle: prepare a container of capacity 5 ℓ or more. MK3053C 6-81...
Page 362 (3). (1), pour in the stipulated amount of engine Referring to section “6.9 COVERS,” re- oil from the oil refill port (2). attach the engine cover. Referring to “5.7.4 Stowing the outriggers,” stow the outriggers. 6-82 MK3053C...
Page 363 Confirm visually that there are no cracks or any other defects. If the clamp band is loose, apply oil to the screw area and tighten it securely. Referring to section “6.9 COVERS,” re- attach the engine cover. MK3053C 6-83...
Page 364 • 0° inspection If it has opened up to the stroke end, press the “✓” switch. The inspection result is displayed. Set up the device with the outrigger’s rotation angle opened to 10° or more. 6-84 MK3053C...
Page 365 (2).  Pour in the gear oil until the oil is exiting the oil quantity inspection plug hole. After checking and replenishing the oil, securely tighten the oil quantity inspection plug (2). MK3053C 6-85...
Page 366 (it is OK to apply grease thinly), beneath the fuel tank drain plug (P). and install it.  When installing the fuel filter element, once the packing is in contact with the packing surface, without using the filter wrench, tighten it well by hand. 6-86 MK3053C...
Page 367 Because when the machine suddenly starts moving, it is extremely dangerous. • Antifreeze is combustible, so do not bring it close to fires. When handling antifreeze, do not smoke. MK3053C 6-87...
Page 368 Open the drain plug (3) and discharge the cooling water. After discharging the water, close the drain valve (3). Pour tap water into the radiator water refill port and fill it up close to the water refill port. 6-88 MK3053C...
Page 369 • After replacing the hydraulic oil filter, while the oil is filling up the piping and the oil compressor, do not start the machine for a while. MK3053C 6-89...
Page 370 Re-adjust it after one hour of operation. replenish the hydraulic oil. Referring to section “6.9 COVERS,” re- Referring to section “6.9 COVERS,” re- attach the engine cover. attach the left machinery cover. Referring to section “6.14.7 Hydraulic circuit air removal,” remove the air. 6-90 MK3053C...
Page 371 • After replenishing the oil, securely close the oil refill port cap. Otherwise, the oil refill port cap may come off during operation, and the heated oil may gush out, resulting in scalding. MK3053C 6-91...
Page 372 (2) and similar as an oil leak stop by adhering it to discharge the oil. the drain plug and the screw part of the oil refill plug, and securely tighten the screw. 6-92 MK3053C...
Page 373 Inspect the discharged oil, and if it contains a large quantity of metal powder or foreign matter, contact us or our sales service agency. Securely tighten the drain plug (P). Place the discharged oil receptacle directly below the drain plug (1). MK3053C 6-93...
Page 374 • Hex wrench for removing the plug: 4 mm • Oil removal elbow (use recommended): drain Using the hex wrench (C), turn and remove port size Rc1/16 (PT1/16) the drain plug (P). Stop the machine on firm level ground. 6-94 MK3053C...
Page 375 • If the element is damaged despite the for around five minutes, and operate the replacement period not being reached, equipment without the winch. replace it with a new item. • Use the genuine product for the element. MK3053C 6-95...
Page 376 (6) (two places). that dust does not enter the air cleaner hose. Referring to section “6.9 COVERS,” re- Referring to section “6.9 COVERS,” take off attach the engine cover. the engine cover. 6-96 MK3053C...
Page 377 Other than when removing air, be sure to close the air removal plug of the fuel ejection pump. Otherwise, it may cause the engine to stop. Stop the machine on firm level ground. Referring to section “6.9 COVERS,” take off the engine cover. MK3053C 6-97...
Page 378: What To Do When This Happens
• If the battery terminal is loose, there is the danger of sparks being generated or of explosion due to poor contact. When attaching the terminal, tighten it securely. 6-98 MK3053C...
Page 379: Battery Handling Cautions
• In periods when the temperature is low, the battery performance falls significantly, so keep the charging ratio close to 100% as much as possible and be careful about heat retention in preparation for starting the machine the next morning. MK3053C 6-99...
Page 380: Cautions When Charging The Battery
• Firmly fix the charger’s (+) side charging clip to the battery’s (+) terminal and then firmly fix the charger’s (-) side charging clip to the battery’s (-) terminal. 6-100 MK3053C...
Page 381: Starting Up Using A Booster Cable
If the engine does not start, leave it for a ・Use a battery for the working machine with minute or longer, then try again. the same capacity as the battery of the broken-down machine. ・Check that the cable and clips are not damaged or corroded. MK3053C 6-101...
Page 382: Lithium-Ion Battery Usage Cautions
“OFF” when stopping the machine for a long time. • If using the battery in an environment at an altitude exceeding 1000 m, the lithium-ion battery cooling performance will fall, so be careful when using it. 6-102 MK3053C...
Page 383: Cautions When Charging The Lithium-Ion Battery
“ON.” This operation cancels the safety device, so only use it in an emergency such as a stowing working. MK3053C 6-103...
Page 384 0° (level). When the boom angle is less than 0° (level) and the If the starter switch key is turned to OFF, the outriggers are stowed, the boom and override function is also turned OFF (normal). 6-104 MK3053C...
Page 385 Open the air removal plug at the top of the fuel ejection pump. Once the fuel coming out of the plug stops bubbling, re-tighten the air removal plug. MK3053C 6-105...
Page 386: Pre-Stowage Procedure
When they are left outdoors unavoidably, choose flat ground that is not subject to flooding or other natural disasters, and cover them. • Fill the fuel tank. This prevents moisture gathering. • Fill the oil, grease, and replace the oil without omission. 6-106 MK3053C...
Page 387: Post-Stowage Handling
When storing the machine long term, stow in the following way. • After washing and cleaning each part, stow them indoors. When they are left outdoors unavoidably, choose flat ground that is not subject to flooding or other natural disasters, and cover them. MK3053C 6-107...
Page 388: Handling During Stowage
・When storing the machine for a long period again, apply grease to the exposed parts of the hydraulic cylinder’s piston rod. ・After the anti-rusting operation, to avoid overcharging of the lithium-ion battery, charge the battery to around 50% charged. 6-108 MK3053C...
Page 389: Preparations For The Cold
• In particular, if mud, etc. together with drops of antifreeze, refer to “6.13.8 [3] Cleaning the water gets inside the seal of the surface of the cooling system internals [engine specification / hydraulic cylinder’s piston rod, then the seal engine and electric specification].” will be damaged. MK3053C 6-109...
Page 390 For details of the lubricating oils for each piece of equipment, refer to “6.5.1 Use of fuel and lubricating oil depending on temperature,” and switch to items of the specified viscosity. 6-110 MK3053C...
Page 391: Troubleshooting
The outrigger’s extension Adjust the outrigger’s angle is not standard. The rated total load value is low. extension angle and extension The outrigger’s extension range to the target values. range is short. MK3053C 6-111...
Page 392 Turn the disconnect switch OFF Monitor signal defective once and disconnect the power The monitor does not turn off supply. even if the starter switch is turned Wiring defect Inspection / repair (★) to OFF. Monitor defective Replacement (★) 6-112 MK3053C...
Page 393 Left without charging Overuse of the override Even if the starter switch is ON, The starter switch has never Set the starter switch to the power is not turned on been set to START START once MK3053C 6-113...
Page 394 The starter turns, but the fuel. engine does not start. Air contaminating the inside of Referring to “6.14.8 Fuel circuit air the fuel system removal,” remove the air Fuel defective Replace with the specified fuel. 6-114 MK3053C...
Page 395 The engine stops during lubricating oil depending on Insufficient fuel operation. temperature,” and replenish the fuel. Wiring defect Inspection / repair (★) Sensor defect Inspect or replace (★) Crushing or dislodging of the Inspect or replace (★) hose MK3053C 6-115...
Page 396 ・The warming-up operation ・Set the warming-up operation hot. mode is set to “ON” mode to “OFF” ★Inspection and repair ・The cooling fan is ★Inspection, repair, and malfunctioning ・The controller is replacement ★Inspection, repair, and malfunctioning ・The battery is malfunctioning replacement 6-116 MK3053C...
Page 397 ・The outside temperature is high temperatures During operation, the motor is hot ・The warming-up operation ・Set the warming-up operation mode to OFF mode is set to ON ★Inspection, repair ・The cooling fan is malfunctioning ★Inspection, repair, ・The controller is malfunctioning replacement MK3053C 6-117...
Page 398 ・The electric motor is malfunctioning The control panel’s malfunction ・The control panel is ★Inspection, repair, replacement lamp (red) is lit malfunctioning ・Overloading The breaker trips (power supply ★Inspection, repair, replacement ・Connected in reverse phase box or control panel) ・Short circuit, etc. 6-118 MK3053C...
Page 399: Before Troubleshooting
Are all the transmitter’s operation levers in the or the operation switches, repair them or replace neutral position? them. Check whether the fuse has blown or not, and if Has the receiver’s internal fuse blown? it has blown, investigate the cause and replace the fuse. MK3053C 6-119...
Page 400: Radio-Controller Device Defects
The crane cannot be operated from the transmitter. (The power is turned on and Radio controller device or wiring Inspection / repair (★) the crane is operated from the failure emergency operation on the machine main body side) 6-120 MK3053C...
Page 401 TRANSMITTER,” and establish receiver and the transmitter. communication. The radio controller lamp (blue) does not light up Lamp defective Inspection and repair Vehicle controller failure Inspection / repair (★) Wiring defect Inspection / repair (★) MK3053C 6-121...
Page 402 Cancel the controls The crane operation always stops controls under certain conditions. Failure of the sensors Adjustment Wiring defect Inspection / repair (★) The tri-colored lamp does not light Fuse blown Replacement Tri-colored lamp malfunction Repair or replacement (★) 6-122 MK3053C...
Page 403: Display Of Error Codes And Warnings
When the light goes on during operation, there is an abnormality in the battery charging system. Immediately stop the operation, check the tension of the fan belt and check the harness. MK3053C 6-123...
Page 404: Message Display
Depending on the monitor settings, there may be cases when it is not displayed. For the display / non-display settings, contact us or our sales service agency.  There are messages other than those described above. If a message is displayed on the monitor screen, check the contents well, and proceed according to the message. 6-124 MK3053C...
Page 405 If the engine abnormality code above has occurred. only is displayed, stop the □□□-□ machine usage, and contact us or our sales service agency. • For the error code’s □□□, the display varies depending on the error occurring. MK3053C 6-125...
Page 406 This Page Intentionally Left Blank...
Page 407 OPERATION MANUAL for MAEDA MINI-CRAWLER CRANE MK3053C Document Number 201E-OM2407-00 First edition 5th July, 2024 Issued by MAEDA SEISAKUSHO CO., LTD. 1095, Onbegawa, Shinonoi, Nagano City, Nagano Prefecture, 388-8522 Japan Any reproduction or reprinting without permission is prohibited.

This manual is also suitable for:

K0001

Maeda MK3053C Operation Manual

Quick Links

Troubleshooting

Need help?

Questions and answers

Related Manuals for Maeda MK3053C

Summary of Contents for Maeda MK3053C

This manual is also suitable for:

Table of Contents