Maeda MC305C-3 Operation Manual
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Maeda MC305C-3 Operation Manual

Mini-crawler crane
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103ME-OM1903-00
Operation Manual
Mini-Crawler Crane
Serial No. D3001 and up

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Summary of Contents for Maeda MC305C-3

  • Page 1 103ME-OM1903-00 Operation Manual Mini-Crawler Crane Serial No. D3001 and up...
  • Page 2 Improper use of this machine can lead to serious injury. The operators and maintenance personnel must carefully read this manual and sufficiently understand its contents before operation / inspecting / maintaining the machine. Keep this manual at hand to read it over anytime.

  • Page 3: Table Of Contents

    Table of Contents INTRODUCTION Section 1 INTRODUCTION ........................ 1-2 SAFETY Section 2 SAFETY DEFINITIONS ..................... 2-2 SAFETY PRECAUTIONS ....................2-2 SAFETY LABEL LOCATIONS ................... 2-9 Machine Body ......................2-9 Remote Control System ..................2-20 Electric Motor (Option) .................... 2-22 850kg Searcher Hook (Option) ................2-24 SPECIFICATIONS, TERMINOLOGY AND Section 3 CAPACITY CHARTS...
  • Page 4 Rated Total Load Chart for 850 kg Searcher Hook ..........3-18 WORKING RADIUS/LIFTING HEIGHT ................3-20 Standard ......................... 3-20 Working Radius/Lifting Height for Searcher Hook ..........3-22 OPERATION Section 4 MACHINE COMPONENTS ....................4-2 TRAVEL AND CRANE CONTROLS .................. 4-4 3 8 B 3 7 B C ontrol Location .......................
  • Page 5 Changing Path While Travelling Forward/Backward ..........4-25 STOPPING/PARKING MACHINE ..................4-26 DESCRIPTION ON OUTRIGGER AND CRANE SAFETY DEVICES ......4-27 Outrigger Safety Devices ..................4-27 Functions of Outrigger Safety Device ..............4-27 OUTRIGGER COMPONENTS ..................4-31 OUTRIGGER DISPLAY ....................4-32 OUTRIGGER UN-SET WARNING LAMP (RED) .............
  • Page 6 Working Radius Upper Limit Switch and LED (Orange) ........4-66 Lifting Height Upper Limit Switch and LED (Orange) ......... 4-67 Cancel Switch ....................4-67 Check Switch ..................... 4-67 Descriptions of Moment Limiter Display ..............4-68 Actual Load Display Section ................4-68 Rated Total Load Display Section ..............
  • Page 7 Receiver ......................... 4-79 Functions of Remote Control System ..............4-79 REMOTE CONTROL SYSTEM COMPONENTS ............. 4-80 Transmitter ......................4-80 LCD Screen ....................... 4-81 Start/Reset Button ..................... 4-81 Stop/EMO Button ....................4-81 Speed/Mode Button ................... 4-81 Hook Stow/Setting Button .................. 4-81 Horn Button .......................
  • Page 8 Operation in Outrigger Mode ................4-107 Outrigger Setting ..................... 4-108 Outrigger Stowage ................... 4-109 Operation in Crane Mode ..................4-110 Slewing Operation ................... 4-111 Boom Telescoping Operation ................4-111 Hook Raising and Lowering Operation ............4-112 Boom Derricking Operation ................4-112 Automatic Hook Stow Function ................
  • Page 9 MAINTENANCE AND INSPECTION Section 5 GENERAL MAINTENANCE INFORMATION AND PRECAUTIONS ........5-2 1 7 B P recautions Before Maintenance ................5-2 1 8 B P recautions During Maintenance ................5-4 1 9 B C heck the Service Meters ..................5-8 2 0 B U se Genuine Parts for Replacement ................
  • Page 10 REAR COVER ......................... 5-19 5 1 B R emoving Rear Cover .................... 5-19 5 2 B I nstalling Rear Cover ....................5-19 FUSES ..........................5-20 INSPECTION ........................5-21 Pre-Start and Post-Start Inspection Items .............. 5-21 Pre-Start Visible Checks ..................5-22 Crane .........................
  • Page 11 Replace Oil in Hydraulic Oil Tank ..............5-51 Replace Oil in Slewing Reduction Gear Case ........... 5-52 Replace Oil in Winch Reduction Gear Case ............5-53 Replace Oil in Travelling Motor Reduction Gearcase ........5-54 Inlet/Exhaust Valve Head Clearance Inspection/Adjustment ......5-55 Inspect / Clean / Test Fuel Injector ..............
  • Page 12 Position Pin and Lynch Pin ................5-79 Post-Start – After Starting Engine ..............5-80 Moment Limiter for Operation (850 kg Searcher Hook Mode) ......5-80 TROUBLESHOOTING ..................... 5-81 General ........................5-81 Machine Body ......................5-81 Engine ........................5-82 Electrical Components .................... 5-83 Remote Control ......................

  • Page 13: Introduction

    Section 1 INTRODUCTION 3/2019 MC305C-3...
  • Page 14 - graphic, Machine maintenance procedures may be electronic or mechanical, including photocopying, updated by Maeda at any time. Always obtain the recording, taping, or information storage and latest information from Maeda or a Maeda sales...

  • Page 15: Safety

    Section 2 SAFETY 3/2019 MC305C-3...

  • Page 16: Safety Definitions

    Section 2 – SAFETY DEFINITIONS Mini-Crawler Crane M A E D A SAFETY DEFINITIONS SAFETY PRECAUTIONS Maeda is concerned for your safety and the There is no substitute for common sense and condition of your mini-crawler crane. Safety careful practices. Improper practices or...
  • Page 17 Look at the level gauge when making adjustments during operation. Always keep the machine body level when operating. ・Sudden or jerky movement of the travel, crane or outrigger controls can cause the machine to tip over. Always operate these controls smoothly. 3/2019 MC305C-3...
  • Page 18 ・Never hoist more than one load at a time. ・When you hoist a long load, such as pipes, clamp the load vertically or secure it at both ends. 3/2019 MC305C-3...
  • Page 19 ・Undersized wiring systems can cause an electrical fire. 3/2019 MC305C-3...
  • Page 20 ・Never check for a hydraulic fluid or fuel leak with your hands. Always use a piece of wood or ・Always stop the engine before cardboard. Have your authorised Maeda dealer beginning service. or distributor repair the damage. Flying Object Hazard ・If the engine must be serviced while it is...
  • Page 21 Working Above Machine Hazard ・Always maintain three-point contact as you climb on or off an elevated work surface. ・Do not jump from the elevated work surface. ・Do not climb on the boom, outrigger or other machine surface. 3/2019 MC305C-3...
  • Page 22 Retrieve any tools or parts that may have dropped inside of the machine to avoid improper machine operation. Never dispose of hazardous materials by dumping them into a sewer, on the ground, or into groundwater or waterways. 3/2019 MC305C-3...

  • Page 23: Safety Label Locations

    M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS SAFETY LABEL LOCATIONS Machine Body Fig. 2-1 3/2019 MC305C-3...
  • Page 24 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A Fig. 2-2 2-10 3/2019 MC305C-3...
  • Page 25 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [3] 103-4762100 [4] 103-3439200 3/2019 MC305C-3 2-11...
  • Page 26 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A [11] 103-4762500 [8] 349-3195100 [12] 103-4551300 [9] 349-4420700 [13] 349-4421100 [10] 103-4762300 (２ places) 2-12 3/2019 MC305C-3...
  • Page 27 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [14] 103-2214000 3/2019 MC305C-3 2-13...
  • Page 28 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A [21] 349-4421400 [30] 104-4550800 [26] 350-4539700 (2 places) [41] 553-4267100 [28] 103-4559100 (2 places) [45] 349-4426900 (4 places) 2-14 3/2019 MC305C-3...
  • Page 29 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [51] 349-4527000 [46] 349-4427000 (4 places) [52] 103-4576900 (4 places) [54] 349-4421900 [47] 349-4427100 [50] 349-4427200 3/2019 MC305C-3 2-15...
  • Page 30 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A [60] 349-4427900 [56] 893-4239100 [57] 349-4427300 [58] 349-4427400 [61] 349-4526900 [59] 349-4427500 2-16 3/2019 MC305C-3...
  • Page 31 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [62] 104-3327800 [63] 349-4427800 [70] 103-4551500 (4 places) [73] 349-4422000 3/2019 MC305C-3 2-17...
  • Page 32 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A [75] 553-4268000 (2 places) [78] 585-4739200 [76] 553-4267500 (2 places) [80] 103-3392900 [77] 553-4267400 (2 places) [81] 103-3289000 [83] 103-4551700 2-18 3/2019 MC305C-3...
  • Page 33 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [84] 349-4536600 [89] 350-4432100 [93] 103-4604800 [87] 353-4488600 [88] 103-4559200 (2 places) [94] 103-4604900 [95] 553-4267700 3/2019 MC305C-3 2-19...

  • Page 34: Remote Control System

    Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A Remote Control System Transmitter Receiver Fig. 2-3 2-20 3/2019 MC305C-3...
  • Page 35 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [1] 349-4428500 [68] 300-4214000 [92] 104-4559400 [23] 104-4559300 3/2019 MC305C-3 2-21...

  • Page 36: Electric Motor (Option)

    Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A Electric Motor (Option) Fig. 2-4 2-22 3/2019 MC305C-3...
  • Page 37 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [26] 350-4539700 [70] 103-4552100 (4 places) [100] 553-4267300 (2 places) 3/2019 MC305C-3 2-23...

  • Page 38: 850Kg Searcher Hook (Option)

    Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A 850kg Searcher Hook (Option) Fig. 2-5 2-24 3/2019 MC305C-3...
  • Page 39 M A E D A Mini-Crawler Crane Section 2 – SAFETY LABEL LOCATIONS [1] 102-4621200 (2 places) [9] 103-4636300 (2 places) [2] 103-3347900 [5] 102-4608500 (2 places) [4] 103-4635500 3/2019 MC305C-3 2-25...
  • Page 40 Section 2 – SAFETY LABEL LOCATIONS Mini-Crawler Crane M A E D A [B1] 103-1213400 2-26 3/2019 MC305C-3...

  • Page 41: Specifications, Terminology And Capacity Charts

    Section 3 SPECIFICATIONS, TERMINOLOGY AND CAPACITY CHARTS 3/2019 MC305C-3...

  • Page 42: Machine Features

    Radio- and remote-control system allow remote outrigger setting and remote crane operation. 3/2019 MC305C-3...

  • Page 43: Crane Terminology

    This is a vertical distance between the hook Working Radius bottom and the ground with the hook raised to the A horizontal distance between the axis of slewing upper limit. and the hook centre. Fig. 3-5 Fig. 3-2 3/2019 MC305C-3...

  • Page 44: Principle Specifications List

    Crane low-pressure relief: 4.41 to 6.37MPa {45 to 65kgf/cm Hydraulic oil tank capacity Model Yanmar 3TNV80F Type Vertical in-line 3-cylinder, Water cooled, 4-cycle (special vortex) Engine Displacement 1.226L (1226cc) Rated output (continuous) 20.38hp SAE/2500min (15.2kW/2500min {20.7PS/2500rpm Fuel tank capacity Diesel/ 40L 3/2019 MC305C-3...
  • Page 45 15-degree inclination), travelling lever lock, travelling/crane/outrigger selector switch (designed to prevent the machine from craning at travelling), outrigger safety device (outrigger interlock and crane interlock), moment limiter (working envelope limited), working status lamp, outrigger non-installation warning lamp Classification Mobile crane ISO4301/2 Group A1 3/2019 MC305C-3...

  • Page 46: Remote Control System Specifications

    Extending and retracting Slewing Counterclockwise (left)/clockwise (right) Power ON/OFF Horn Warning signal Hook stow/Setting Hook stowing/Mode setting Push button switches Speed/Mode Speed control/Mode selection Start/Reset Engine start/Reset Stop/EMO Engine stop/Emergency stop Trigger type accelerator Hydraulic control + Engine control 3/2019 MC305C-3...

  • Page 47: 850 Kg Searcher Hook Specifications

    System / Item Standard Electric motor option Machine mass 3930 kg 4070 kg Mass and dimensions Stowed 4435  1280  1880 mm length  width  height Crane capacity 850 kg Performance Maximum working radius 13.1 m 3/2019 MC305C-3...

  • Page 48: Dimensional Drawings

    Section 3 – DIMENSIONAL DRAWINGS Mini-Crawler Crane M A E D A DIMENSIONAL DRAWINGS Machine Dimensional Drawing Fig. 3-6 3/2019 MC305C-3...

  • Page 49: 850Kg Searcher Hook Dimensional Drawing

    M A E D A Mini-Crawler Crane Section 3 –DIMENSIONAL DRAWINGS 850kg Searcher Hook Dimensional Drawing Fig. 3-7 3/2019 MC305C-3...

  • Page 50: Outrigger Width Dimensional Drawing

    Section 3 – DIMENSIONAL DRAWINGS Mini-Crawler Crane M A E D A Outrigger Width Dimensional Drawing Fig. 3-8 3-10 3/2019 MC305C-3...

  • Page 51: Rated Total Load Charts

    • Operate using the value on the load chart corresponding to the "MAX", "MID" or "MIN" outrigger extension. • The rated lifting capacities with bold numbers are based on crane strength and others, on its stabilities (not exceeded 85% of tipping). Fig. 3-9 3/2019 MC305C-3 3-11...

  • Page 52: Boom Length

    3. "Boom (1) + (2) + (3)": With booms (4) and (5) retracted, booms (2) and (3) are fully extended. "Boom (1) + (2) + (3)" is to apply to crane operation with boom (3) extended even if only slightly. Fig. 3-12 3-12 3/2019 MC305C-3...
  • Page 53 5. "Boom (1) + (2) + (3) + (4) + (5)": All the booms are fully extended. "Boom (1) + (2) + (3) + (4) + (5)" is to apply to crane operation with half of the " mark" on boom (4) passes boom (3). Fig. 3-14 3/2019 MC305C-3 3-13...

  • Page 54: Rated Total Load Chart For Standard Specification

    Standard wire rope specification: 6xWs (26) Deductions from rated total loads must be IWRC, 8 mm diameter, 73 m made for the weight of hook block, ball/hook, Specified breaking load: 42.4 kN slings, rigging or other suspended gear. 3-14 3/2019 MC305C-3...

  • Page 55: Rated Total Load Chart-4 Falls

    2350 3.00 2090 4.50 5.00 3.50 1800 3.50 1680 5.00 6.00 4.00 1430 4.00 1370 6.00 7.00 4.50 1140 4.50 1120 7.00 8.00 5.00 5.00 8.00 9.00 5.62 5.50 9.00 10.00 6.00 9.99 11.00 7.00 12.16 7.82 3/2019 MC305C-3 3-15...

  • Page 56: Rated Total Load Chart-2 Falls

    1480 3.00 1480 4.50 5.00 3.50 1480 3.50 1480 5.00 6.00 4.00 1430 4.00 1370 6.00 7.00 4.50 1140 4.50 1120 7.00 8.00 5.00 5.00 8.00 9.00 5.62 5.50 9.00 10.00 6.00 9.99 11.00 7.00 12.16 7.82 3-16 3/2019 MC305C-3...

  • Page 57: Rated Total Load Chart-Single Fall

    (kg) (kg) (kg) 2.50 2.70 4.00 4.50 3.00 3.00 4.50 5.00 3.50 3.50 5.00 6.00 4.00 4.00 6.00 7.00 4.50 4.50 7.00 8.00 5.00 5.00 8.00 9.00 5.62 5.50 9.00 10.00 6.00 9.99 11.00 7.00 12.16 7.82 3/2019 MC305C-3 3-17...

  • Page 58: Rated Total Load Chart For 850 Kg Searcher Hook

    E-Boom (arm) and the hook will interfere with The capacity when using the searcher hook each other. refers to the capacity with the crane hook To avoid this interference: In SH1 position, do detached. not operate above 30 degree boom angle. 3-18 3/2019 MC305C-3...
  • Page 59 M A E D A Mini-Crawler Crane Section 3 –RATED TOTAL LOAD CHARTS OFFSET POSITION SH1 OFFSET POSITION SH2 OFFSET POSITION SH3 3/2019 MC305C-3 3-19...

  • Page 60: Working Radius/Lifting Height

    • The boom (4) in the diagram of working radius and lifting height represents a state that half of the " mark" passes boom (3). Fig. 3-15 3-20 3/2019 MC305C-3...
  • Page 61 This is load radius. The rated total load decreases with increase in the working radius. Actual crane operation requires the planning of work, allowing for sufficient clearance more than that provided in the diagram. Fig. 3-16 Fig. 3-17 3/2019 MC305C-3 3-21...

  • Page 62: Working Radius/Lifting Height For Searcher Hook

    • Fall mode and searcher hook offset position must be set as "850 kg searcher hook mode" when 850 kg searcher hook is used. Searcher hook offset position must be displayed on moment limiter boom length window. • Never use the searcher hook and the crane hook simultaneously. Fig. 3-18 3-22 3/2019 MC305C-3...
  • Page 63 M A E D A Mini-Crawler Crane Section 3 –WORKING RADIUS/LIFTING HEIGHT Fig. 3-19 Fig. 3-20 3/2019 MC305C-3 3-23...
  • Page 64 Section 3 –WORKING RADIUS/LIFTING HEIGHT Mini-Crawler Crane M A E D A This Page Intentionally Left Blank 3-24 3/2019 MC305C-3...

  • Page 65: Operation

    Section 4 OPERATION 3/2019 MC305C-3...

  • Page 66: Machine Components

    10 - Outrigger 24 - Track roller 11 - Slewing device 25 - Idler 12 - Rubber track 26 - Carrier roller 13 - Travel control 27 - Working status lamp 14 - Crane control 28 - Working light 3/2019 MC305C-3...
  • Page 67 Rubber Tracks, Travel Motor and Sprocket, Track Roller, Idler, Carrier Roller Travel device for travelling. Travel Control A part for travel control of the machine. For operation method of travelling, see "TRAVELLING CONTROLS AND OPERATION" on page 4-21. 3/2019 MC305C-3...

  • Page 68: Travel And Crane Controls

    10 - Left travelling lever 4 - Boom lift lever 11 - Moment limiter display panel 5 - Outrigger un-set warning lamp 12 - Instrument panel 6 - Acceleration pedal 13 - Outrigger operation panel 7 - Level gauge 3/2019 MC305C-3...
  • Page 69 The The lever returns to the "Neutral" position and lowering/raising of the hook block stops. the slewing stops. • Raise: Pull the lever toward you (Up). • Slew clockwise (right): Pull the lever toward you (Right). 3/2019 MC305C-3...
  • Page 70 • Lock: Push the lever to the right. to make the spin turn. • Travel: Push the lever to the left. NOTICE: Operate the travelling lock lever while the left and right travelling levers are at the "Neutral" position. 3/2019 MC305C-3...

  • Page 71: Instrument Panel Sections

    4 - Travelling high-speed switch 11 - Pre-heat monitor 5 - Boom stowing switch 12 - Engine water temperature monitor 6 - Horn switch 13 - Engine oil pressure monitor 7 - Engine emergency stop switch (EMO) 14 - Battery charge monitor 3/2019 MC305C-3...

  • Page 72: Switches

    "ON" and the crane operating speed increases. • OFF: Push the switch forward again, and when the pilot lamp goes off the switch turns "OFF" and the crane operating speed returns to normal. 3/2019 MC305C-3...
  • Page 73 "ON" position and extinguishes at the "OFF" position. Fig. 4-17 • ON: Press the switch. The engine stops. • OFF: Turn the switch clockwise (direction of the arrow in the figure). The switch returns to the original position. 3/2019 MC305C-3...

  • Page 74: Monitors

    The key (10 bars) light up.) automatically returns to the "ON" • The remaining amount indicated may not be position. correct for a while after the starter switch is turned to the "ON" position. This is normal. 4-10 3/2019 MC305C-3...
  • Page 75 If it lights up during the operation, the engine oil pressure has dropped. Immediately stop the machine and check the clogging of the engine oil filter and engine lubricant level. Fig. 4-22 Fig. 4-24 3/2019 MC305C-3 4-11...

  • Page 76: Operation Seat

    • Press your back against the back seat of the operation seat and adjust the operation seat so that you can operate the acceleration pedal, control levers and travelling lever without any difficulty. • Never adjust the operation seat while driving the machine. 4-12 3/2019 MC305C-3...

  • Page 77: Seat Forward/Backward Slide Adjustment

    After adjusting the back seat (1), release your hand from the reclining adjusting lever (4). The back seat (1) is fixed to the position. NOTICE: The reclining adjustment angle is 75 degrees in 7 steps forward and 23 steps in backward. Fig. 4-29 3/2019 MC305C-3 4-13...

  • Page 78: Cautions Under Cold Weather

    (let the pneumatic oil to escape to the hydraulic oil tank by raising to above the hydraulic circuit set pressure) by using operation lever. Doing so improves the Fig. 4-32 Machine reactions and prevents improper operations. 4-14 3/2019 MC305C-3...

  • Page 79: Starting Engine

    • Verify that the fuel lever of the water Fig. 4-35 separator pot is at the vertical position (open) before starting the engine. • Verify that the switch on the control box for the radio controller is at the "OFF" position. 3/2019 MC305C-3 4-15...

  • Page 80: Starting Engine In Cold Weather

    The key will automatically return to the "ON" When the engine preheating has completed, the position. "preheat monitor" goes off. Fig. 4-40 Fig. 4-36 Fig. 4-37 4-16 3/2019 MC305C-3...

  • Page 81: Correction When Working At High Altitude

    The following measures are necessary to reduce misfires. • Use fuel with a high cetane number (52 or more). • Fully warm up the engine at mid to low engine speed (5 minutes or longer). 3/2019 MC305C-3 4-17...

  • Page 82: Operations And Checks After Starting Engine

    • Do not idle away suddenly until the warm-up operation is done. • When the engine has started, check if the "battery charge monitor" and "engine oil pressure monitor" went off. • If there is any abnormality, repair. 4-18 3/2019 MC305C-3...
  • Page 83 Operate the boom telescoping lever (2) slowly forward/backward to extend/retract the boom until it reaches the stroke end. Check if there is any abnormality with the operation. Fig. 4-48 If there is any abnormality, repair. Fig. 4-46 3/2019 MC305C-3 4-19...

  • Page 84: Stopping Engine

    (6) and change the engine speed to idling. Continue the no-load operation for about 5 minutes. Fig. 4-49 2. Turn the starter switch to the "OFF" position. The engine will stop. Fig. 4-50 Remove the starter switch key. 4-20 3/2019 MC305C-3...

  • Page 85: Travelling Position

    4-21 for the travelling posture of the Fig. 4-51 machine. See "Crane Stowing Operation" on page 4-57 to stow the crane. Stow the hook block in the specified position. See "OUTRIGGER STOWING" on page 4-45 to stow the outriggers. Fig. 4-52 3/2019 MC305C-3 4-21...

  • Page 86: Allowable Water Depth

    The machine may overrun. • Never change the direction on the slope or cut the slope horizontally. Fig. 4-54 • Travel safely such as by going down to the level ground and taking a detour. 4-22 3/2019 MC305C-3...

  • Page 87: Starting Travelling Machine

    "Travel" position and the travelling lock toward you to travel backward. lever to the "Travel" position. Preparation before Starting Travelling Operate the work selector switch on the outrigger operation panel to the "Travel" position. Fig. 4-59 Fig. 4-56 3/2019 MC305C-3 4-23...

  • Page 88: Changing Machine Travelling Mode

    Operate the left travelling lever. Fig. 4-60 Tilt the left travelling lever forward to turn to the right in the forward direction. Tilt the left travelling lever toward you to turn to the right in the backward direction. 4-24 3/2019 MC305C-3...

  • Page 89: Spin Turns

    "Neutral" position. Right Turn While Travelling Backward While tilting the left travelling lever toward you, return only the right travelling lever to the "Neutral" position. Fig. 4-62 Fig. 4-63 3/2019 MC305C-3 4-25...

  • Page 90: Stopping/Parking Machine

    • Always set the travelling lock lever to the "LOCK" position when parking the machine. • Stop the engine and always remove the key for the starter switch. Bring the key with you when you leave the machine. Fig. 4-66 4-26 3/2019 MC305C-3...

  • Page 91: Description On Outrigger And Crane Safety Devices

    “Outrigger” position even after the outrigger is being extended and set, there may be faulty adjustment or failure in the outrigger safety device. Contact us or our sales service agency. 3/2019 MC305C-3 4-27...
  • Page 92 When the machine tilts for Crane inclination alarm device is • Warning buzzer sounds continuously 3 degrees or more during activated outrigger setting operation Crane Operation Standard Operation Sequence, Display and Warning Activation of Safety Devices Machine Status 4-28 3/2019 MC305C-3...
  • Page 93 • Fully retract the boom • Boom stowing lamp on display panel • If the boom stowing lamp • Boom horizontal stowing (green) does not light up, all the position outrigger operations stop. • Boom slew and stow position 3/2019 MC305C-3 4-29...
  • Page 94 • Travelling lock lever at "Travel" position • Start the engine. • Operate the travelling levers. When the machine tilts for Crane inclination alarm device is • Warning buzzer sounds continuously 15 degrees or more during activated travelling operation 4-30 3/2019 MC305C-3...

  • Page 95: Outrigger Components

    Section 4 – OUTRIGGER COMPONENTS OUTRIGGER COMPONENTS Fig. 4-67 1 - Position pin 5 - Outer box 2 - Rotary 6 - Inner box 3 - Outrigger setting cylinder 7 - Rigor adapter (Tray) 4 - Outrigger extension cylinder 3/2019 MC305C-3 4-31...

  • Page 96: Outrigger Display

    (1) at the tip of the detected by the detection switch (1) of the inner box (2) and by the detection switch inside the outrigger rotary. inner box. Fig. 4-70 Fig. 4-69 4-32 3/2019 MC305C-3...

  • Page 97: Outrigger Un-Set Warning Lamp (Red)

    Boom movements are detected by the projection (4) (movable) at the side of the boom rear edge and the detection switch (3) (fixed) at the boom connection. Fig. 4-74 Fig. 4-72 3/2019 MC305C-3 4-33...

  • Page 98: Outrigger Operation Panel

    • When operating the work selector switch to the "Travel" position, be sure to stow the crane and put the machine in the "travelling posture". Driving the machine not in the "travelling posture" can overturn the machine, resulting in serious accidents. 4-34 3/2019 MC305C-3...
  • Page 99 Push down the switch upward. The outrigger setting cylinder retracts and you can stow the outrigger. • Neutral: Release your finger from the switch. The switch returns to the "Neutral" position and the outrigger setting cylinder stops telescoping. 3/2019 MC305C-3 4-35...

  • Page 100: Outrigger Setting

    • If the ground is not protected or if the outriggers may sink even after protecting the ground, do not perform the crane operations. Fig. 4-83 4-36 3/2019 MC305C-3...

  • Page 101: Cautions When Placing Outrigger

    Do not operate the outriggers with the moment tracks are approximately 50 mm above the limiter override switch at the "ON" position. ground. Set the moment limiter override switch to the "ON" position only when performing the inspection and maintenance. 3/2019 MC305C-3 4-37...
  • Page 102 • Reduce the engine speed to low speed when • Despite the maximum extension of all the operating the outrigger switches. outriggers, the width of extended outriggers decreases due to an ungraded ground even when clearance "a" in the figure is 50 mm. 4-38 3/2019 MC305C-3...
  • Page 103 "a" in the figure is 50 mm. Do not perform crane operation under such extension condition. Potential overturning of the machine may occur that leads to serious personal injury if disregarded. Fig. 4-92 3/2019 MC305C-3 4-39...
  • Page 104 NOTICE: The boom stowing lamp (1) and four outrigger extension lamps (2) on the outrigger display are ON. Fig. 4-95 Pull the position pin (1) out of the rotary (2) and rotate the rotary outward. Fig. 4-96 4-40 3/2019 MC305C-3...
  • Page 105 Operate the remaining switches in the same same time will suddenly raise two outriggers way and extend the inner box of the four on one side, causing overturning of the outriggers to the desired position. Set the machine. switch to the "Neutral" position. 3/2019 MC305C-3 4-41...
  • Page 106 Fig. 4-105 When the machine was raised to about 50 mm above the ground, operate the outrigger operation switches while checking the position of the bubble in the level to adjust the machine to be levelled. Fig. 4-106 4-42 3/2019 MC305C-3...

  • Page 107: Outrigger Maximum Extension

    (between the outrigger bottom and crawler NOTICE: If even a group of outriggers is retracted bottom) in the figure at below. to a medium point, all the outriggers are deemed to be extended at the medium. Fig. 4-110 3/2019 MC305C-3 4-43...

  • Page 108: Outrigger Minimum Extension

    (between the outrigger bottom and crawler bottom) in the figure at below. Fig. 4-114 NOTICE: If even a group of outriggers is retracted to the minimum point, all the outriggers are deemed to be extended at the minimum. 4-44 3/2019 MC305C-3...

  • Page 109: Outrigger Stowing

    • Do not put your hands or fingers around the outrigger operation panel to the "Outrigger" gaps of movable areas when stowing the position. outriggers. Your hands or fingers may get caught, and it may lead to serious accidents. 3/2019 MC305C-3 4-45...
  • Page 110 Operate the work selector switch on the same height. Return the switch to the outrigger operation panel to the "Outrigger" "Neutral" position. position. Repeat this operation to gradually lower the machine until the rubber tracks go down completely on the ground. 4-46 3/2019 MC305C-3...
  • Page 111 The engine stops. Fig. 4-122 Fig. 4-125 NOTICE: On the outrigger display, the boom stowing lamp (1) (green) is illuminated and four outrigger extension lamps (2) and four outrigger grounding lamps (3) are flashing in red. 3/2019 MC305C-3 4-47...
  • Page 112 (1) (green) is illuminated and four outrigger extension lamps (2) and four outrigger grounding lamps (3) are flashing in red. Fig. 4-127 NOTICE: The position pin (1) has a wire to prevent the loss of the pin. 4-48 3/2019 MC305C-3...

  • Page 113: Working With Crane

    • Do NOT remove the case cover or panel sheet from, or disassemble the moment limiter body. Such act may damage case and/or panel sheet and may result in failures and improper operations. 3/2019 MC305C-3 4-49...

  • Page 114: Crane Operation

    Do Not Operate with Slewing Force Drawing in or lifting the load with slewing operation is prohibited. Fig. 4-129 Fig. 4-130 Do Not Operate with Derricking Force Drawing in or lifting the load with boom lift operation is prohibited. Fig. 4-131 4-50 3/2019 MC305C-3...
  • Page 115 "hook lowering" must be operated at low speed. Fig. 4-136 Fig. 4-133 Do Not Access into Working Radius Do not let people access into the working radius such as permitting an operator to go under the hoisted load. Fig. 4-134 3/2019 MC305C-3 4-51...
  • Page 116 Perform the following operations before crane operation. Operate the travelling lock lever (8) to the "LOCK" position. Fig. 4-138 Fig. 4-139 Operate the work selector switch on the outrigger operation panel to the "Crane" position. Fig. 4-140 4-52 3/2019 MC305C-3...
  • Page 117 Then, operate the winch lever (3) to "DOWN" (push forward) side to lower the hook block. Fig. 4-146 Fig. 4-143 • Extending the boom will hoist the hook block, activating the alarm buzzer of the over winding detector and the operation stops. 3/2019 MC305C-3 4-53...
  • Page 118 • Raise: Pull the lever to the "UP" side toward you. NOTICE: Adjust the winch raising/lowering speed with the winch lever and stroke of the acceleration Fig. 4-149 pedal. 4-54 3/2019 MC305C-3...
  • Page 119 NOTICE: Adjust the boom telescoping speed with machine. the boom telescoping lever and the stroke of the • Do not pull the load horizontally or pull in acceleration pedal. the load by telescoping the boom. 3/2019 MC305C-3 4-55...
  • Page 120 "LEFT" side. • Neutral: Release your hand from the lever. The lever returns to the "Neutral" position and the slewing stops. • Slew clockwise (right): Pull the lever toward you to the "RIGHT" side. 4-56 3/2019 MC305C-3...
  • Page 121 Operate the boom telescoping lever (2) to the "RETRACT" (pull toward you) side to fully retract the boom. Fig. 4-159 Fig. 4-156 3/2019 MC305C-3 4-57...
  • Page 122 "UP" (pull toward you) side again and slowly boom lowering operation to the lowest position raise the hook block (4) to stow the block at and slewing operation. the bottom of the boom end. 4-58 3/2019 MC305C-3...

  • Page 123: Moment Limiter (Overload Detector)

    100 % or more) (B) Yellow working status lamp (Pre-warning light for load factor of 90 to 100 %) (C) Green working status lamp (Working light for load factor of less than 90 %) 3/2019 MC305C-3 4-59...

  • Page 124: Function Of Moment Limiter

    Fig. 4-167 Fig. 4-166 The moment limiter is a device installed to prevent the hoisted load from falling, the boom from breaking, or the machine from overturning due to overloading. 4-60 3/2019 MC305C-3...

  • Page 125: Display Of Moment Limiter Error Messages

    90 % or higher. Performing crane operation at high engine speed will slew the hoisted load and is very dangerous, causing overloading and it may break the boom. 3/2019 MC305C-3 4-61...
  • Page 126 Section 4 – MOMENT LIMITER (OVERLOAD DETECTOR) Mini-Crawler Crane M A E D A The audible message of "Peep, overloading" will be issued. Furthermore, the LED of "100 %" on the moment limiter load factor display lights up. Fig. 4-170 4-62 3/2019 MC305C-3...
  • Page 127 To return to the "OFF" position, also return the If you use this switch when lifting from the boom raising lever. ground, there is a risk of serious accidents such as the machine being damaged or overturning. Fig. 4-173 3/2019 MC305C-3 4-63...

  • Page 128: Moment Limiter Display

    25 - Single-fall LED (Blue) 11 - Actual load display 26 - 2-falls LED (Blue) 12 - Rated total load display 27 - 4-falls LED (Blue) 13 - Working radius display 14 - Working radius upper limit switch 4-64 3/2019 MC305C-3...

  • Page 129: Descriptions Of Switches On Moment Limiter Display

    NOTICE: The setting and cancelling will not repeat even if you keep the switch pressed for more than 2 seconds. Let your hand go off the switch and press the switch again. 3/2019 MC305C-3 4-65...

  • Page 130: Boom Angle Lower Limit Switch And Led (Orange)

    2 seconds. Let your hand go off the repeat even if you keep the switch pressed for switch and press the switch again. more than 2 seconds. Let your hand go off the switch and press the switch again. 4-66 3/2019 MC305C-3...

  • Page 131: Lifting Height Upper Limit Switch And Led (Orange)

    NOTICE: The setting and cancelling will not repeat even if you keep the switch pressed for Fig. 4-182 more than 2 seconds. Let your hand go off the switch and press the switch again. 3/2019 MC305C-3 4-67...

  • Page 132: Descriptions Of Moment Limiter Display

    This section displays the number of wire falls on the hook, working radius, currently hoistable rated total load (hook weight + lifting ring weight + load to be hoisted) computed out of the conditions such as the degree of outrigger extension. 4-68 3/2019 MC305C-3...

  • Page 133: Working Radius Display Section

    The lifting height is the vertical distance from the ground to the bottom of the hook. Boom Angle Display Section This section constantly displays the current boom angle during the crane operation. The boom angle is the angle the boom and the horizontal line form. 3/2019 MC305C-3 4-69...

  • Page 134: Load Factor Led (Changes To Green/Yellow/Red)

    "bars" around the number "50" on the right and perform the recovery operation caused by below are ON. overloading. All the "bars" around the number "50" and above See "Recovery Operation after Auto Stop" on are OFF. page 4-61 for recovery operations. 4-70 3/2019 MC305C-3...

  • Page 135: Working Envelope Restriction Warning

    (4) stop automatically. When a warning buzzer sounds, operate the winch lever immediately to the "LOWER" side or operate the boom telescoping buzzer to the "RETRACT" side to lower the hook block (1). 3/2019 MC305C-3 4-71...

  • Page 136: Number Of Wires Selector Switch

    When the boom is lowered and the boom angle If the boom working envelope is limited due to reaches "about 3 degrees", the boom lowering working space issue, you can set the boom operation stops automatically. working envelope to the desired value. 4-72 3/2019 MC305C-3...

  • Page 137: Setting Working Envelope

    "ON" position to enable the restriction. NOTICE: The last status of the set value has been held in memory even if the starter switch is turned to the "OFF" position. Fig. 4-199 Fig. 4-198 3/2019 MC305C-3 4-73...

  • Page 138: Moment Limiter Override Switch

    OFF shutting down the machine. Restart the machine as normal, and the Moment Limiter system will commence with normal start up sequence. Fig. 4-200 4-74 3/2019 MC305C-3...

  • Page 139: Remote Control System Introduction

    Levers and buttons can be manipulated by sprayer cleaners which deteriorate plastics the thumb, while the Accelerator lever can and produce cracks. be triggered by the forefinger. Other fingers should grab the grip to hold the Transmitter. 3/2019 MC305C-3 4-75...

  • Page 140: No Shock To The Transmitter

    (14°F or below) or cold air internal wires or produce other failures. directly blows Sudden change in temperature may cause dew formation inside the Transmitter and which causes failure or malfunction and leads to a serious hazard. Fig. 4-210 4-76 3/2019 MC305C-3...

  • Page 141: Precautions For Crane Operation - Before Starting Engine

    • Activate the control levers and Accelerator manipulated. Further, verify the each lever of the Transmitter slowly in any time. applicable value of load in the Transmitter is identical to that of the Moment limiter display. 3/2019 MC305C-3 4-77...

  • Page 142: Precautions For Crane Operation - Terminating The Operation

    DC 7 volts. This prevents malfunctions of the Crane due to voltage drop and the operation will resume automatically when the voltage is restored to DC 7 volts or higher. 4-78 3/2019 MC305C-3...

  • Page 143: Transmitter

    • The connection by the cable between the which control the Crane. Transmitter and Receiver allows secure Further, the load data from the Moment limiter of communication between both. the Crane are delivered to the Transmitter through the cable. 3/2019 MC305C-3 4-79...

  • Page 144: Remote Control System Components

    5 - Hook Stow/Setting Button 11 - Boom lift/No.4 Outrigger Operation Lever 6 - Horn Button 12 - Accelerator Lever 7 - Power Switch 13 - Grip 8 - Slewing/No.1 Outrigger Operation Lever 14 - Connection Cable 4-80 3/2019 MC305C-3...

  • Page 145: Lcd Screen

    LCD screen. button provides the forced stop function. Fig. 4-217 Fig. 4-215 Horn Button Push this button to toot the horn. Fig. 4-218 3/2019 MC305C-3 4-81...

  • Page 146: Power Switch

    (stowing) of either only No.1 or all of the outriggers at once: • Retraction (stowing): Push the upper end of the lever. • Neutral: Release your finger from the lever. • Extension (installation): Push the lower end of the lever. 4-82 3/2019 MC305C-3...

  • Page 147: Boom Lift/No.4 Outrigger Operation Lever

    • Extension (installation): Push the lower lever. end of the lever. • Extension (installation): Push the lower end of the lever. In the A MODE, this lever is used as a cursor key by "▲ and ▼". 3/2019 MC305C-3 4-83...

  • Page 148: Accelerator Lever

    • The Accelerator lever does not control outriggers. • The acceleration rate is always indicated in the right part of the LCD screen during crane operations. (See the figure.) Fig. 4-227 Fig. 4-225 4-84 3/2019 MC305C-3...

  • Page 149: Storage Case

    Before putting it into this case, ensure that the power of the Transmitter is OFF. Hook one end of the hook belt (16) to the Transmitter and attach another end to the operator’s waist belt, or such. Fig. 4-228 Fig. 4-229 3/2019 MC305C-3 4-85...

  • Page 150: Receiver Components

    Section 4 – REMOTE CONTROL SYSTEM COMPONENTS Mini-Crawler Crane M A E D A Receiver Components Fig. 4-230 1 - Control Box 3 - Monitor Display 2 - Main Switch 4 - Receptacle 4-86 3/2019 MC305C-3...

  • Page 151: Control Box

    (4) is incompetent. Always keep the water proof cap attached. Fig. 4-232 CAUTION: In the event that the monitor display (3) indicates an error code, settle the error as follows: Push the Reset button of the Transmitter. 3/2019 MC305C-3 4-87...

  • Page 152: Fuse In The Receiver

    The fuse is placed inside the Receiver. Test and replacement of the fuse shall be practiced as follows: • Use the following hand tools: • A screw driver (Philips) • Jewelers screw driver set (Slotted) Fig. 4-235 4-88 3/2019 MC305C-3...

  • Page 153: Insertion Of A Fuse

    • Care should be exercised so that the cover (3) of the Receiver will not catch wires when it is attached back. [Fuse class] Fig. 4-237 Type: Grass tube fuse Rating: 15A Fig. 4-238 3/2019 MC305C-3 4-89...

  • Page 154: Messages In The A Mode Screen

    (7) Reset of "user values" by the speed set-up mode. (8) Version information of the Transmitter firmware. To switch the function item to another, or to change the setting value of the function, use, the Hook raising and lowering lever. 4-90 3/2019 MC305C-3...
  • Page 155 1. will be fixed and the minutes". display returns to the A MODE screen. When the desired time is obtained, push the Hook stow/Setting button. The time in above 1. will be fixed and the display returns to the A MODE screen. 3/2019 MC305C-3 4-91...
  • Page 156 To reset, select "Y", otherwise, select N" to preserve. Whether reset or not is fixed, push the Hook stow/Setting button. The status in above 1. will be fixed and the display returns to the A MODE screen. 4-92 3/2019 MC305C-3...

  • Page 157: An Example For Setting In The A Mode

    • Change of the other function item setting is available by the same procedure. In such event, correctly exit from the A MODE, without fail. Fig. 4-250 3/2019 MC305C-3 4-93...

  • Page 158: Procedure In The Operation Mode

    OFF, and then push the Power button again for power ON. Fig. 4-257 NOTICE: In case that the power is already ON, once turn OFF, and then push the Power button again for power ON. 4-94 3/2019 MC305C-3...
  • Page 159 "n"; the mark turns to "Extension ( )". Fig. 4-260 Fig. 4-264 Fig. 4-261 Fig. 4-265 NOTICE: Switching between "Outrigger Extension mode" and "Outrigger Ground setting mode" is alternately by each push of the Speed/Mode button. 3/2019 MC305C-3 4-95...

  • Page 160: Remote Control System Verifications

    • Check for any cracks and/or damage to the Transmitter enclosure, or impairment to the rubber cover of the operation levers and control buttons. Fig. 4-267 Repair such cracks or damage immediately, when any. 4-96 3/2019 MC305C-3...
  • Page 161 While the "Crane mark" is shown in the LCD screen (for approx. 2 seconds), push the Speed/Mode button for 2 seconds. Fig. 4-269 Fig.4-28 Also, verify that "STOP" is correctly Fig. 4-273 displayed in the LCD screen when the Stop/EMO button is pushed. Fig. 4-270 3/2019 MC305C-3 4-97...
  • Page 162 Here, confirm that the "Outrigger mark" is Fig. 4-279 exhibited, then it enters into the "Ground setting Manipulate each operation lever and verify mode", soon after. that each indication in the LCD screen is correct. Fig. 4-276 Fig. 4-280 Fig. 4-277 Fig. 4-281 4-98 3/2019 MC305C-3...

  • Page 163: Checking Receiver

    • Check the Main switch (2) and Receptacle (4) for the loose conditions or damages. Fig. 4-284 Repair immediately when such loose conditions or damages are found. Such loose conditions or damages may cause errors or faults of the Receiver, which results a serious hazard. 3/2019 MC305C-3 4-99...

  • Page 164: Checking After Starting Engine

    1. Set the Acceleration Lever to the medium speed (nearly middle in its stroke). 2. Pull out the choke knob, unless otherwise the sufficient idling has been completed. 3. Return the chock knob to its initial position, when the engine starts. 4-100 3/2019 MC305C-3...

  • Page 165: Checking "Outrigger Mode" Operation

    Switch the operation mode to the "OUTRIGGER MODE" and confirm that "Ground setting mode" is indicated in the LCD screen. Fig. 4-288 Fig. 4-289 Push the Speed/Mode button. Here, confirm that the "Outrigger Extension mode" is exhibited. 3/2019 MC305C-3 4-101...
  • Page 166 Push the Start/Reset button and start the engine. Use the Slewing/No.1 Outrigger operation lever, to the both "Extend (lower)" and "Retract (upper)" area, and check that the No. 1 outrigger follows the lever operation. Fig. 4-295 Fig. 4-292 Fig. 4-296 Fig. 4-293 4-102 3/2019 MC305C-3...

  • Page 167: Checking "Crane Mode" Operation

    Push the Power switch of the Transmitter to power ON. Then turn ON the Main switch of the Receiver. Fig. 4-299 13. Try other outriggers, No. 2 to 4 by the same manipulation and confirm that the outriggers correctly respond to the lever control. 3/2019 MC305C-3 4-103...
  • Page 168 Raise the boom to the sufficient angle (approximately 60 degree) by the Boom lift lever, pushing to the "Raise (upper)" area. Fig. 4-307 11. Using the Hook raising and lowering lever to the "Raise (upper)" area, hoist the hook. Fig. 4-304 Fig. 4-308 4-104 3/2019 MC305C-3...
  • Page 169 12., above, slowly pull and release and pull the Accelerator lever to verify the the Accelerator lever and confirm that the hook is stowed properly. speed of each action follows the acceleration ratio. Fig. 4-312 Fig. 4-310 3/2019 MC305C-3 4-105...

  • Page 170: Remote Control Operation

    VERIFICATIONS" on page 4-96. Cautions Before Operation So that dropping the Transmitter is prevented, hook one end of the hook belt (16) to the Transmitter and attach another end to the operator’s waist belt, or such. Fig. 4-313 4-106 3/2019 MC305C-3...

  • Page 171: Operation In Outrigger Mode

    Crane is grounded in the "Ground setting mode", then switch to the • "Extension mode" to retract them. • Unless otherwise this order is followed, • that may cause to tip the Crane and bring a • serious accident. Fig. 4-317 3/2019 MC305C-3 4-107...

  • Page 172: Outrigger Setting

    1. Push Speed/Mode button in the mode The operation mode is switched to condition of above 4. "Outrigger Extension mode". The operation mode is switched to "Ground setting mode". Fig. 4-320 Fig. 4-323 Fig. 4-321 Fig. 4-324 4-108 3/2019 MC305C-3...

  • Page 173: Outrigger Stowage

    Push Speed/Mode button in the mode Operation Mode" on page 4-94, enter into condition of above 3. the "OUTRIGGER MODE". The operation mode is switched to "Outrigger Extension mode". Fig. 4-326 Fig. 4-329 Fig. 4-327 Fig. 4-330 3/2019 MC305C-3 4-109...

  • Page 174: Operation In Crane Mode

    Transmitter and cause its fault; it may result a serious accident. • To toggle each operation lever to the opposite side, or to use another lever, always release the Accelerator lever, each 4-110 3/2019 MC305C-3...

  • Page 175: Slewing Operation

    Accelerator lever slowly. Such abrupt acceleration or deceleration The boom retracts. especially while a load is hung will make a large impact to the Crane and may result a serious hazard such as Crane tipping or damage. 3/2019 MC305C-3 4-111...

  • Page 176: Hook Raising And Lowering Operation

    Accelerator lever slowly. The hook starts to be raised. Hook Lowering Push the Hook raising and lowering/No.2 outrigger operation lever to "Lower (lower)", then pull the Accelerator lever slowly. The hook starts to be lowered. 4-112 3/2019 MC305C-3...

  • Page 177: Automatic Hook Stow Function

    Push the Speed/Mode button. Each push will forward the LCD screen indication as shown in the diagram, below: When the indicated mode fits your requirement, carry on the Crane operation in that condition. Fig. 4-340 Fig. 4-342 3/2019 MC305C-3 4-113...
  • Page 178 Micro speed mode, beforehand Fig. 4-344 Push the Hook stow/Setting button for at least 2 seconds. Indication of "2" in the LCD screen is high-lighted and it enters into the "Micro speed mode" setting screen. 4-114 3/2019 MC305C-3...

  • Page 179: Engine Stop And Emergency Stop Procedure

    • The Stop/EMO button is also available to stop the engine in the normal conditions. Push the Stop/EMO button to stop the engine from the Transmitter or in case of emergency. The engine stops. Fig. 4-348 3/2019 MC305C-3 4-115...

  • Page 180: Engine Start And Reset Procedure

    (3) Repair all the cracks or damages without fail, if any. Put the transmitter into the accessory storage case and keep it in the dry and cool place where the wind and rain or direct sun ray is sheltered. 4-116 3/2019 MC305C-3...

  • Page 181: Electric Motor (Option)

    Before inspection and maintenance, inform all personnel to alert them of your action. Be sure to attach a warning tag, "Do Not Touch", to the power supply equipment breaker for the prevention of accidental breaker operation conducted by other personnel. 3/2019 MC305C-3 4-117...

  • Page 182: Instrument Panel Sections

    Push down the switch to the left. The engine is designated as a power output source. • Electric motor: Push down the switch to the right. The electric motor is designated as a power output source. Fig. 4-352 4-118 3/2019 MC305C-3...

  • Page 183: Power Unit

    2 - Electric motor 3 - Coupling 4 - Hydraulic pump Power Supply Box Fig. 4-354 1 - Power supply box 2 - Power supply box door 3 - Door handle 4 - Terminal block 5 - Cable inserting hole 3/2019 MC305C-3 4-119...

  • Page 184: Inverter Unit

    Inverter Unit Fig. 4-355 1 - Rear cover 5 - AC circuit power switch 2 - Protective cover 6 - Power light (white) 3 - Inverter unit 7 - Trouble light (red) 4 - DC12V power switch 4-120 3/2019 MC305C-3...
  • Page 185 • The AC circuit power switch is illustrated in the upper figure, and the DC12V power switch is illustrated in the lower figure. Fig. 4-359 • ON: An error is detected in the Inverter unit. • OFF: The Inverter unit is in normal operation. 3/2019 MC305C-3 4-121...

  • Page 186: Electric Motor Operation

    • Be sure to supply the machine specifications-compliant power (AC 380, 400V) to this machine. Power supply Power Power supply voltage current frequency 380, 400 V 11.5 A 50 Hz 4-122 3/2019 MC305C-3...
  • Page 187 Draw the machine specifications-compliant original position and securely tighten four cabtyre cable (A) through a hole of the mounting screws (11). cable ground (7) at the bottom of the power supply box to connect it to the terminal block (5). 3/2019 MC305C-3 4-123...

  • Page 188: Operation And Checking After Power Connection

    Staff guide personnel as necessary, and follow the lead of them. Fig. 4-367 • Keep the Inverter unit cover away from flammable materials. The inside of the Inverter unit will rise in temperature that may lead to fire, if disregarded. 4-124 3/2019 MC305C-3...
  • Page 189 Use the following procedure for checking the power unit if an abnormal noise, odour, or vibration is present in and around the power unit. (1) Turn the starter switch to the "OFF" position. The electric motor comes to a stop. 3/2019 MC305C-3 4-125...

  • Page 190: Machine Operation

    Fig. 4-372 Remove the cover (6) of the terminal block (5) in the power supply box, holding the left and right of the cover (6) with fingers and pulling it toward you. Fig. 4-373 4-126 3/2019 MC305C-3...

  • Page 191: Searcher Hook Safety Precautions

    Do not use this switch in normal situations to lift loads off the ground. Serious accidents such as machine damage or toppling may occur if you use the boom raising enable switch to lift loads off the ground. 3/2019 MC305C-3 4-127...

  • Page 192: Kg Searcher Hook Components (Option)

    10 Hexagonal bolt with washer Bracket (strength 10.9) Bracket 1 11 Hexagonal bolt with washer Bracket 2 (strength 10.9) 12 Hexagonal bolt with washer Position pin (strength 10.9) Lynch pin 13 Nut (strength 10) Hook 14 High tension washer Shackle 4-128 3/2019 MC305C-3...

  • Page 193: 850 Kg Searcher Hook Moment Limiter Display

    12 - Rated total load display 26 - 2-fall LED (Blue) 13 - Working radius display 27 - 4-fall LED (Blue) NOTICE: For information on the moment limiter not provided here, see "MOMENT LIMITER (OVERLOAD DETECTOR)" on page 4-59. 3/2019 MC305C-3 4-129...
  • Page 194 NOTICE: When changing the setting, right after doing so, release your hand from the switch, and then press the switch again. When in 850 kg searcher hook mode, searcher hook position mode display and actual boom length value are shown alternately. 4-130 3/2019 MC305C-3...
  • Page 195 M A E D A Mini-Crawler Crane Section 4 – 850 kg SEARCHER HOOK MOMENT LIMITER DISPLAY Searcher Hook offset position and mode display in boom length display Fig. 4-378 3/2019 MC305C-3 4-131...

  • Page 196: Searcher Hook Operation

    Fig. 4-382 To install searcher hook, always use new Line up the hole (8) in E-boom (7) tip and genuine Maeda bolts, nuts, and washers. hole (9) in bracket. Fig. 4-383 4-132 3/2019 MC305C-3...
  • Page 197 Fig. 4-388 Fig. 4-386 DANGER! E-boom and hook may interfere with each other in RESTRICTED AREA on Rated Total Load chart, and it may cause a serious accident. Always adjust boom angle to proper position for the work. 3/2019 MC305C-3 4-133...
  • Page 198 • Sudden lever operation increases error in reading load. When operating boom derricking lever, move the lever slowly. 4-134 3/2019 MC305C-3...

  • Page 199: Transportation

    • ALWAYS set the Machine in the "travelling posture" and securely insert the position pins Fig. 4-393 (4 pieces) to the outrigger rotary parts before loading or unloading the Machine. For more information, see "TRAVELLING POSITION" on page 4-21. Fig. 4-395 3/2019 MC305C-3 4-135...

  • Page 200: Cautions During Transport

    Fig. 4-398 For more information, see "Loading/Unloading" on page 4-137, and "Cautions on Loading Machine" on page 4-140. Cautions During Transport Observe the related regulations and exercise safety during transport. Fig. 4-399 4-136 3/2019 MC305C-3...

  • Page 201: Loading/Unloading

    • Always unload the machine by moving forward. Moving backward involves overturning hazard. The operator must be on the back side of the truck. • Loading/Unloading the machine involves danger. Be extremely careful. 3/2019 MC305C-3 4-137...

  • Page 202: Hoisting Machine

    The machine may lose its balance. Do not operate any other lever than travelling levers on the ramp boards. Load the machine properly to the desired position on the trailer. 4-138 3/2019 MC305C-3...
  • Page 203 Then slowly hoist the machine. Check the changes in the posture due to the leakage from the hydraulic circuit on the head side of the boom lift cylinder (4) when the machine is hoisted. 3/2019 MC305C-3 4-139...

  • Page 204: Cautions On Loading Machine

    Provide a square timber in front and back of the rubber tracks to prevent the machine from moving during transportation. Secure the machine with chain or wire cable. Secure it surely, especially not to let it slip to the side. Fig. 4-404 4-140 3/2019 MC305C-3...

  • Page 205: Maintenance And Inspection

    Section 5 MAINTENANCE AND INSPECTION 3/2019 MC305C-3...

  • Page 206: General Maintenance Information And Precautions

    Appoint a person who supervises the work and follow his/her instructions in case of machine repair or installing/uninstalling a work device. Unexpected accidents due to misunderstood communication between workers may occur during teamwork. Use Appropriate Tools Fig. 5-1 Fig. 5-3 Fig. 5-2 3/2019 MC305C-3...
  • Page 207 • Apply pawls to so that the prevent rubber tracks do not move. • Persons in charge of the maintenance should pay attention to prevent physical body and clothes from contacting the moving parts. 3/2019 MC305C-3...

  • Page 208: 8 B P Recautions During Maintenance

    • Do not spill oil or grease. Fig. 5-8 • Do not sprawl the tools. • Beware of the footing when walking. To prevent accidents, do not attempt maintenance when the engine is running. 3/2019 MC305C-3...
  • Page 209 • Put on protective equipment. • Keep the ventilation well. • Put away the combustibles and prepare a fire extinguisher. • Do not ground to a location near electrical part. Such may cause the electrical part to malfunction. 3/2019 MC305C-3...
  • Page 210 If the high pressure oil gave serious injury to skin service agency for a repair. or eye, wash away with flowing water and see the doctor as soon as possible. 3/2019 MC305C-3...
  • Page 211 • Check for any dropped tool or part. Ones caught by the interior or lever related link mechanism poses extra danger. • Check for any fuel leak, water leak, oil leak, bolt loose and similar issues. 3/2019 MC305C-3...

  • Page 212: 9 B C Heck The Service Meters

    2 9 B Safety precautions provided on the machine Replacement should always be followed when using the Always use Maeda genuine parts as specified in machine. the parts catalogue for part replacement. C autions for Weld Repair U se Pure Grease...

  • Page 213: Assure Safe Rubber Track

    A minute amount of oil remaining in piping and any circumstance. cylinders does not cause problems even if Replace the oil entirely when replenishing a mixed with other oil. different type of oil. Always use Maeda genuine parts for part replacement. 3/2019 MC305C-3...

  • Page 214: Fuel Handling

    • Drain deposits and water out of the fuel tank before starting the engine or approximately 10 • Always use Maeda genuine filters. minutes after fuel replenishment. Coolant Handling • The air should be released from the circuit when •...

  • Page 215: Electrical Part Handling

    O-ring. • Air bleed of the hydraulic circuit is required after the following tasks are performed: replacement and cleaning of the hydraulic oil filter element and strainer, repair and replacement of hydraulic equipment, and hydraulic piping replacement. 3/2019 MC305C-3 5-11...

  • Page 216: Breaking-In Machine

    See "Replace Engine Oil and Oil Filter" on page 5-41. • The metal powder produced inside the engine through breaking-in increases in the engine oil and it deteriorates the oil, shortening the engine life. 5-12 3/2019 MC305C-3...

  • Page 217: Consumables

    Proper replacement of consumables delivers increased economy in machine use. Always use Maeda genuine parts for part replacement. See the parts catalogue for part numbers when ordering parts.

  • Page 218: Lubricating Oil

    "Nippon Oil Super Highland 32" is adopted for a hydraulic oil system as factory default. • For adjustment of antifreeze concentrations in coolant with temperature at -10°C or below, see "Coolant Replacement and Internal Cleaning" on page 5-49. 5-14 3/2019 MC305C-3...

  • Page 219: Special Tools And Standard Tightening Torque

    3.85 32.6-43.1 3.35-4.43 65.5 6.70 57.0-75.3 5.85-7.70 10.6 90.4-120 9.2-12.2 16.6 142-187 14.4-19.1 22.8 195-258 19.8-26.2 32.4 277-366 28.2-37.3 44.0 376-497 38.3-50.6 56.0 477-631 48.7-64.4 81.9 699-925 71.2-94.2 1090 948-1250 96.5-128 1485 1290-1710 131-174 1910 1660-2200 167-223 3/2019 MC305C-3 5-15...
  • Page 220 62.5 6.40 53.1-71.9 5.44-7.35 11.1 92.7-125 9.44-12.8 17.7 148-200 15.0-20.4 27.7 230-312 23.5-31.9 38.1 317-429 32.4-43.8 54.0 450-608 45.9-62.1 73.4 612-828 62.4-84.4 93.3 778-1050 79.3-107 1340 1140-1540 116-156 1820 1550-2090 157-213 2470 2100-2840 214-290 3180 2700-3660 275-373 5-16 3/2019 MC305C-3...

  • Page 221: Hose Connector Tightening Torque

    Determine the appropriate tightening torque based on the hose connector width across flats (a). Fig. 5-22 Width Across Target value Tolerance Hose No. Flat (Mark "a") N▪m kgf▪m N▪m kgf▪m 35-54 3.5-5.5 54-93 5.5-9.5 59-98 6.0-10.0 10.5 84-132 8.5-13.5 16.0 128-186 13.0-19.0 22.0 177-245 18.0-25.0 3/2019 MC305C-3 5-17...

  • Page 222: Machinery Cover

    (three each on the left and right) are used to tighten with the machinery cover. Pull the left-hand machinery cover (1) to the side to remove. Pull the right-hand machinery cover (2) to the side to remove. 5-18 3/2019 MC305C-3...

  • Page 223: Rear Cover

    R emoving Rear Cover 5 1 B Remove the rear cover as follows when performing inspection or maintenance inside the rear cover. Remove the eight retaining bolts (2) from the rear cover (1). Remove the rear cover (1). 3/2019 MC305C-3 5-19...

  • Page 224: Fuses

    Remove the cover (3) of the fuse box. Fig. 5-26 3. Remove the fuse from the fuse box and check/replace the fuse. 4. Insert a new or checked fuse to the original position in the fuse box. 5-20 3/2019 MC305C-3...

  • Page 225: Inspection

    Replace Rubber Tracks See "Rubber Tracks" on page 5-60. Replace Winch Wire Rope See "Winch Wire Rope - Removal" on page 5-66. Check Wire Rope - Boom Telescope Extension See "Wire Rope - Boom Telescope Extension" on page 5-72. 3/2019 MC305C-3 5-21...

  • Page 226: Pre-Start Visible Checks

    Carefully check around these areas. Should you find any abnormality, be sure to fix it or contact us or our sales service agency. Check the items shown in this section as routine surveillance before starting the first work of every day. Fig. 5-28 5-22 3/2019 MC305C-3...

  • Page 227: Crane

    If you find any abnormality, repair. • Check each section of wedge socket for loose bolts and the support pin retaining plate, loose rope cloip, and loose rope wedge. If they are loose, retighten them. 3/2019 MC305C-3 5-23...

  • Page 228: Outriggers

    If you find any abnormality, repair. • Check each of the frames, machinery covers, rear cover and other parts for cracks, excessive deformation, contamination and others. If you find any abnormality, repair. 5-24 3/2019 MC305C-3...

  • Page 229: Pre-Start Inspection - Before Starting Engine

    (3) If the coolant level in the radiator was low, check the radiator, radiator hose, and engine for water leakage. (4) Fill water from the radiator filler opening and securely install the radiator cap (5). 3/2019 MC305C-3 5-25...

  • Page 230: Check / Add Engine Oil

    Open the access hatch in the right-hand machinery cover. Fig. 5-33 Pull the oil level gauge (G) out and wipe the oil with a disposable cloth. Insert the oil level gauge (G) into the gauge guide and pull it out. 5-26 3/2019 MC305C-3...

  • Page 231: Check / Add Fuel

    • Be sure to close the tank cap after refuelling. Turn the Starter Switch to the ON position. Fig. 5-35 Looking at the fuel gauge on the monitor panel, check if the fuel is filled to almost full (around "F"). Fig. 5-36 3/2019 MC305C-3 5-27...

  • Page 232: Check / Clean Water Separator

    (2) Turn the retainer ring (4) of the head (5) section counterclockwise (left) to loosen, then remove the pot (1) from the head (5) section. (3) Drain the fuel and water out of the pot (1). 5-28 3/2019 MC305C-3...

  • Page 233: Check / Clean Fuel Filter Pot

    (2) Turn the retainer ring (3) of the head (4) section counterclockwise (left) to loosen, then remove the pot (1) from the head (4) section. (3) Drain the fuel and water out of the pot (1). 3/2019 MC305C-3 5-29...

  • Page 234: Check / Add Hydraulic Oil

    (1) See "OUTRIGGER SETTING" on page 4-36 and rotate the outriggers outward. (2) See "Removing Machinery Cover" on page 5-18 and remove the machinery cover. (3) Drain the fuel and water out of the pot (1). 5-30 3/2019 MC305C-3...

  • Page 235: Check / Refill Oil Level In Slewing Reduction Gear Case

    Fig. 5-46 Fig. 5-45 (3) After refilling with the oil, install the filler plug (F) and securely tighten the plug. (4) See "OUTRIGGER STOWING" on page 4-45 and rotate the rotary of the "outrigger (2)" inward and stow. 3/2019 MC305C-3 5-31...

  • Page 236: Check / Clean Radiator And Oil Cooler Fins

    5-18 and install the machinery cover. life cycle and therefore should be replaced. See "OUTRIGGER STOWING" on page 4-45 and rotate the outriggers inward to stow them. 5-32 3/2019 MC305C-3...

  • Page 237: Post-Start Inspection - After Starting Engine

    Fig. 5-50 Check Working Lights Turn the starter switch to the "ON" position and check the followings. Fig. 5-53 Fig. 5-51 3/2019 MC305C-3 5-33...

  • Page 238: Check Outrigger Display

    Contact us or our sales service agency. degrees in 7 steps forward and 23 steps in backward. Fig. 5-56 Verify that the outrigger un-set warning lamp flashes and the red of the working status lamp lights up. 5-34 3/2019 MC305C-3...

  • Page 239: Check Over Winding Detector Operation

    "5.9 m" (booms (1) + (2)) and boom angle is "57 degrees", then measure the "boom angle" and "working radius. If the measured value(s) differ from the moment limiter display value, contact us or our sales agency. 3/2019 MC305C-3 5-35...

  • Page 240: Periodic Maintenance

    Inspect/Adjust inlet valve and Exhaust exhaust valve clearance Valve Coolant Replacement and Internal Engine Coolant Cleaning Crankcase Check crankcase breather Breather Drain Contaminant Water/Deposits in Water Separator Water Separator Refer to the engine operation manual for details on engine. 5-36 3/2019 MC305C-3...

  • Page 241: Periodic Maintenance Procedure

    See "Replace Hydraulic Oil Return Filter" on page 5-46. • Replacement Hydraulic Oil Suction Filter See "Replace Hydraulic Oil Suction Filter" on page 5-47. • Checking / Adjustment Alternator Belt Tension See "Check / Adjust Belt Tension" on page 5-42. 3/2019 MC305C-3 5-37...

  • Page 242: Drain Contaminant Water/Deposits In Water Separator

    0.20 to 0.29MPa (2 to them. 3kg/cm ) to remove impurities from the internal surface. Put the pot (1) in place, and turn the retaining ring (4) clockwise (right) to tighten it. 5-38 3/2019 MC305C-3...

  • Page 243: Grease Machine Units

    Neo grease Greasing of both (grease for Each boom) sides and bottom of a boom boom Greasing of the boom 2 pieces telescoping wire rope Rope oil Greasing of the winch 1 piece wire rope 3/2019 MC305C-3 5-39...
  • Page 244 Section 5 – PERIODIC MAINTENANCE Mini-Crawler Crane M A E D A Fig. 5-61 5-40 3/2019 MC305C-3...

  • Page 245: Replace Engine Oil And Oil Filter

    Put in the drain plug (P) and secure it. • Keep impurities out of the filler cap when replenishing oil. 3/2019 MC305C-3 5-41...

  • Page 246: Check / Adjust Belt Tension

    16. Start the engine, and idle it for 5 minutes. Stop the engine. Fig. 5-67 17. Make sure again the oil level is in the range "H" to "L" marked on the oil level gauge (G). 5-42 3/2019 MC305C-3...

  • Page 247: Check / Refill Oil In Travelling Motor Reduction Gear Case

    • Replenish the gear oil until it exudes from the oil inspection plug. • Wipe off the oil completely if spilled. Put in the top drain plug (P) and oil inspection plug (G), and secure the plugs upon completion of oil inspection and replenishment. Fig. 5-69 3/2019 MC305C-3 5-43...

  • Page 248: Inspect / Clean / Replace Air Cleaner

    • Avoid the use of an element if its groove, gasket, or sealing is damaged. • Always use Maeda genuine elements. See "OUTRIGGER SETTING" on page 4-36 and rotate the outriggers outward. See "Removing Machinery Cover" on page 5-18 and remove the machinery cover.

  • Page 249: Drain Contaminant Water/Deposits In Fuel Tank

    Put in the drain plug (P) and secure it upon completion of draining fuel. NOTICE: Wipe off fuel completely if spilled. See "Installing Machinery Cover" on page 5-18 and install the machinery cover. See "OUTRIGGER STOWING" on page 4-45 and stow the outriggers. 3/2019 MC305C-3 5-45...

  • Page 250: Replace Fuel Filter Cartridge

    See "OUTRIGGER SETTING" on page 4-36 Set the pot (1) to the head (4) section, then and rotate the outriggers outward. turn the retainer ring (3) clockwise (right) to See "Removing Machinery Cover" on page tighten. 5-18 and remove the machinery cover. 5-46 3/2019 MC305C-3...

  • Page 251: Replace Hydraulic Oil Suction Filter

    • Keep impurities out of the filler cap when replenishing oil. Place the machine on a level surface. See "OUTRIGGER SETTING" on page 4-36 and rotate the outriggers outward. See "Removing Machinery Cover" on page 5-18 and remove the machinery cover. 3/2019 MC305C-3 5-47...

  • Page 252: Replace Air Cleaner Element

    Put the flange (3) in place with liquid packing gasket, or sealing is damaged. applied to the rubber plate (6). Secure the • Always use Maeda genuine elements. flange (3) with the eight mounting bolts (4). NOTICE: Wipe off the oil completely if spilled.

  • Page 253: Coolant Replacement And Internal Cleaning

    Annually or every 1000 hours all-season type Perform cooling system cleaning and antifreeze replacement with the machine in a horizontal position. A mixing ratio of antifreeze varies with temperature. Antifreeze as a volume ratio is min. 30% to yield anticorrosive effect. 3/2019 MC305C-3 5-49...
  • Page 254 13. Start the engine with the drain valve (8) open, and ensure the engine runs at low idle. Conduct a cleaning with running water until clean water flows out of the radiator. 5-50 3/2019 MC305C-3...

  • Page 255: Replace Oil In Hydraulic Oil Tank

    (upper limit) on the level gauge. Excessive oil replenishment may cause the oil to gush from the air breather during machine travelling and crane operation, which could result in burns. • Keep impurities out of the filler cap when replenishing oil. Fig. 5-88 3/2019 MC305C-3 5-51...

  • Page 256: Replace Oil In Slewing Reduction Gear Case

    • See "LUBRICATING OIL" on page 5-14 for which oil to be used. • Use seal tape, etc. at the thread of the filler plug to stop the oil leak and securely tighten the plug after refilling with the oil. Fig. 5-91 5-52 3/2019 MC305C-3...

  • Page 257: Replace Oil In Winch Reduction Gear Case

    • Oil drain pan: A 1-L container • Hexagonal wrench for plug removal: 8mm • Quantity of oil for replacement: 0.75L Place the machine on a level surface. 3/2019 MC305C-3 5-53...

  • Page 258: Replace Oil In Travelling Motor Reduction Gearcase

    "outrigger (1)". Supply the gear oil to the travelling motor reduction gear case through the upper drain plug hole (P). NOTICE: Pour in the gear oil until the oil comes out of the oil level check plug (G). 5-54 3/2019 MC305C-3...

  • Page 259: Inspect / Clean / Test Fuel Injector

    • Disconnect the ground side (normally (-) terminal) first to remove the battery, and conversely, connect the (+) terminal first to install the battery. Objects such as tools coming between (+) terminal and the machine body will cause sparks. Fig. 5-98 3/2019 MC305C-3 5-55...

  • Page 260: Cautions In Handling Battery

    • If the battery fluid contacted clothing or skin, immediately wash away by huge quantity of water. • If the battery fluid entered an eye, wash immediately with water and see the doctor as soon as possible. 5-56 3/2019 MC305C-3...

  • Page 261: Cautions When Starting Up Using Booster Cable

    • Never inverse the connection of [(+) terminal and (-) terminal]. Doing so can cause damage on alternator. • Remove the battery cable when handling the battery other than for battery electrolyte level check and specific gravity measurement. Fig. 5-103 3/2019 MC305C-3 5-57...

  • Page 262: Remove / Install Battery

    • Check that the cable and clips have no breakage and corrosion. • Connect the clips securely. • Verify that the operation levers are at the "Neutral" position. 5-58 3/2019 MC305C-3...
  • Page 263 "START" position to start the engine. If the engine does not start, wait for more than 2 minutes before re-starting. NOTICE: For more information on how to start the engine, see "STARTING ENGINE" on page 4-15. 3/2019 MC305C-3 5-59...

  • Page 264: Rubber Tracks

    Fig. 5-112 • Keep the rubber tracks indoor where there is no direct sunlight or rain when storing them for long time (three months or more). Fig. 5-109 5-60 3/2019 MC305C-3...
  • Page 265 • The operation in the very cold land changes the material of the rubber tracks, shortening its life. Use the rubber tracks in the range of -25°C to + 55°C, due to the physical property of the rubber. 3/2019 MC305C-3 5-61...

  • Page 266: Inspection Of Rubber Tracks

    2 links, replace the rubber track with a new one. Fig. 5-120 Fig. 5-122 Broken Steel Cord If more than half of the steel cord layer is broken on one side, replace the rubber track with a new one. Fig. 5-123 5-62 3/2019 MC305C-3...

  • Page 267: Replace Rubber Track

    With the rubber track engaged with the sprocket, put the crawler on the idler. • Ensure that grease is completely removed from the inside of the rubber track before rotating the sprocket to remove the rubber track. 3/2019 MC305C-3 5-63...

  • Page 268: Checking After Starting Engine

    Adjust the tension frequently until the period of See "OUTRIGGER STOWING" on page 4-45 "initial slack" passes. This will prevent "rubber to stow the outriggers and lower the machine track from coming off due to insufficient tension on on the ground. the rubber track". 5-64 3/2019 MC305C-3...
  • Page 269 Perform the "tension check" of the rubber "Tension Adjustment" on page 5-65 to make track again. adjustments. If the tension is not appropriate, make another adjustment. See "OUTRIGGER STOWING" on page 4-45 to stow the outriggers and lower the machine on the ground. 3/2019 MC305C-3 5-65...

  • Page 270: Wire Rope

    • Evidence of any heat damage from any cause. track. If the tension is not appropriate, make another adjustment. 5. See "OUTRIGGER STOWING" on page 4-45 to stow the outriggers and lower the machine on the ground. Fig. 5-136 5-66 3/2019 MC305C-3...

  • Page 271: Winch Wire Rope - Correcting Twisted Rope

    Operate the boom telescoping lever to the "EXTEND" (push forward) side to extend the boom to its maximum. Operate the winch lever to repeat raising/lowering the hook block for several times. 3/2019 MC305C-3 5-67...

  • Page 272: Winch Wire Rope - Removal

    Remove the wire clip (4). tapping the round bar (6) with a hammer in the direction indicated by the arrow (b). Fig. 5-142 Fig. 5-144 Wind up the remaining wire rope (5) completely. Removal of the winch wire rope is completed. 5-68 3/2019 MC305C-3...

  • Page 273: Winch Wire Rope - Installation

    (5) in the winch drum (8). Ensure that the wire rope is coiled between Fig. 5-145 the irregular winding protective roller (B) and winch drum. The wire rope needs to jut out the boom end (approx. 10m). 3/2019 MC305C-3 5-69...
  • Page 274 (1) Draw the wire rope (5) through the wedge socket (3) as shown in the figure. (2) With the rope wedge (7) in position (a), yank at the wire rope (5) in the direction indicated by the arrow. Fig. 5-151 5-70 3/2019 MC305C-3...

  • Page 275: Check / Adjust Boom Telescoping Wire Rope

    The boom extending wire rope (8) is adjusted to the correct tension if boom No.5 extends upon rotating the adjusting bolt (9). If boom No.5 remains retracted, perform proper adjustment according to "Adjustment of boom telescoping wire rope". Fig. 5-154 3/2019 MC305C-3 5-71...
  • Page 276 • If 5mm or more clearance is formed, rope". adjust the retracting wire rope (5) of boom No.5. • If no clearance is formed, perform wire rope adjustment from section 5 "Adjustment of boom No.5 extending wire rope (8)". Fig. 5-158 Fig. 5-157 5-72 3/2019 MC305C-3...
  • Page 277 (9) of the boom No.5 extending wire rope (8), and secure it with the lock bolt (6). Fig. 5-159 Fig. 5-160 Install the cover (2) to the boom end with the three mounting bolts (1) upon completion of adjustment. 3/2019 MC305C-3 5-73...

  • Page 278: Long-Term Storage

    Contact us or our sales service agency in Be sure to operate the machine once a month the above event. during the storage to maintain the oil film at lubricating section. Charge the battery at the same time. 5-74 3/2019 MC305C-3...

  • Page 279: Cold Temperature Preparation

    For more information on the coolant replacement 1.28 1.29 1.30 1.31 period and mixing rate of antifreezing fluid, see 1.26 1.27 1.28 1.29 Charging "Coolant Replacement and Internal Cleaning" on Rate (%) 1.24 1.25 1.26 1.27 page 5-49. 1.23 1.24 1.25 1.26 3/2019 MC305C-3 5-75...

  • Page 280: Cautions After Completing The Operation

    After the Cold Weather Is Gone When the season changed and it started to get warm, take the following action. • See "LUBRICATING OIL" on page 5-14 to change the oil in the system to the one with specified viscosity. 5-76 3/2019 MC305C-3...
  • Page 281 Replace them at periodic inspection or before they reach abrasion limits. Replace consumable items regularly, which will produce economical use of this machine. Always replace with a Maeda genuine item. Check parts catalogue for correct part number for parts request. List of Consumables...
  • Page 282 See "Position Pin and Lynch Pin" on page 5-79. Post-Start – After Starting Engine Check Moment Limiter for Operation (850 kg See "Moment Limiter for Operation (850 kg Searcher Searcher Hook Mode) Hook Mode)" on page 5-80. 5-78 3/2019 MC305C-3...

  • Page 283: Visible Checks

    If any abnormality is found, change the bolt for a new one even it is earlier than expected bolt life. Position Pin and Lynch Pin • Check if position pin is surely secured with lynch pin. Fig. 5-162 3/2019 MC305C-3 5-79...

  • Page 284: Post-Start - After Starting Engine

    Moment Limiter for Operation (850 kg moment limiter display value, contact Searcher Hook Mode) MAEDA or MAEDA sales agency. Lift up load and check if boom extending or WARNING! If you find any abnormality with boom lowering operation is auto-stopped the moment limiter, immediately contact us or when overloaded.

  • Page 285: Troubleshooting

    Outriggers cannot operate • Operate the work selector • Work selector switch not at switch to "Outrigger" "Outrigger" • Operate the work selector • Work selector switch at Crane and outriggers cannot switch to "Outrigger" or operate "Drive" "Crane" 3/2019 MC305C-3 5-81...

  • Page 286: Engine

    • See "Replace Engine Oil and • Engine oil filter clogged illuminates while the engine is in Oil Filter" on page 5-41 to operation check, adjust, or change the • Engine unit in failure filter (• Check and repair) 5-82 3/2019 MC305C-3...

  • Page 287: Electrical Components

    • Insufficient battery charge • Charge the battery Starter key turning slow • Defective starter (• Replace) Starter disengaged before the • Defective wiring (• Check and repair) engine starts • Insufficient battery charge • Charge the battery 3/2019 MC305C-3 5-83...

  • Page 288: Remote Control

    The LCD screen in the Transmitter or the Monitor In the event where the error messages or error display in the Receiver shows error messages or codes are indicated, once power OFF the error codes. Transmitter and turn it ON again. 5-84 3/2019 MC305C-3...
  • Page 289 ――― • Power on the *Maintenance / he Receiver PCB defective Receiver, again. replace • Data error in the memory. ――― • Power on the *Maintenance / he Receiver PCB defective Receiver, again. replace • CPU error 3/2019 MC305C-3 5-85...
  • Page 290 • Wiring failure between the replace under the manual mode but Receiver PCB and the control some functions valve solenoids. available in the remote control • Electromagnetic proportional mode. * Maintenance / control reducing valve error. replace 5-86 3/2019 MC305C-3...

  • Page 291: Moment Limiter Error Causes And Actions To Be Taken

    If an error is displayed again, calibration has not been done yet. change the indicator. Slewing detection limit switch Adjust and check the slewing detection disconnected or improperly adjusted. limit switch. No displayed Check the fuse built-in the display unit. 3/2019 MC305C-3 5-87...

  • Page 292: Electric Motor

    • Ill-grounded • Adhere to ground standards. • A break in stator winding (• Inspection, repair, replacement) The trouble lamp (red) of the • Failure in the Inverter unit (• Inspection, repair, replacement) Inverter unit comes on. 5-88 3/2019 MC305C-3...
  • Page 293 MAEDA MINI-CRAWLER CRANE MC305C-3 OPERATION MANUAL Document No. 103ME-OM1903-00 First edition: March 1st, 2019 Maeda Seisakusho Co., Ltd. 1095 Onbegawa, Shinonoi Nagano, Nagano 388-8522, Japan No part of this manual can be reproduced in any form without permission.

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