1. Manuals
  2. Brands
  3. Yongmao Manuals
  4. Construction Equipment
  5. STT113
  6. Operation & service manual

Yongmao STT113 Operation & Service Manual

Tower crane
Hide thumbs
Table of Contents

Advertisement

Quick Links

STT113
TOWER CRANE
II. OPERATION & SERVICE MANUAL
2007R32
Fushun Yongmao Construction Machinery Co. Ltd.

Advertisement

Table of Contents
loading

Summary of Contents for Yongmao STT113

  • Page 1 STT113 TOWER CRANE II. OPERATION & SERVICE MANUAL 2007R32 Fushun Yongmao Construction Machinery Co. Ltd.

  • Page 2: Table Of Contents

    Table of contents Chapter I Tower crane parameter and structure ......1B-1 Chapter II Safe rules of tower crane ........... 2B-1 Chapter III Operation ..............3B-1 Chapter IV Power supply and schematic diagram ......4B-1 Chapter V Hoisting winch ............5B-1 Chapter VI Slewing mechanism ...........
  • Page 3 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Tower Crane Parameter and Structure     Chapter I I. Main performance parameter and external dimensions 1 2 . 5 m 5 4 . 2 m 5 2 . 5 m...
  • Page 4 Traveling type Operating condition In service Out of service In service Out of service 112t 135t Dead weight STT113 main performance parameter of tower crane mechanism Table 1-2-3 Speed / Hoist weight Motor Items Mechanism Rope capacity m/min m/min Hoisting ０...

  • Page 5: Chapter Ii Safe Rules Of Tower Crane

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Chapter II Safe Rules of Tower Crane I. manual of safe rules ························································· 2B-2...
  • Page 6 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL I. manual of safe rules 1. The regulation of correct used （1）It is forbidden to use the tower crane which has not pass the performance test; （2） According to the technique regulation and method of use, the crane must be used in its good condition.
  • Page 7 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 3. Personnel selecting and their qualifications （1）The tower crane musts be operated by qualified person; （2）The crane operator must be trained. There must be a specific regulation about the ability of driver, erector, maintenance and service person;...
  • Page 8 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL （2）In service a). The driver should operate the crane in the cabin; b). Test the motion of each mechanism with no load and low speed, meanwhile, check that whether the brake is sensitive before lifting load;...
  • Page 9 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL （3）After one day’s work: a). Lift the hook below the limit point, meanwhile, it is forbidden to leave any load on the hook; b). Drive the trolley close to the mast; c). Starting the weather vane;...
  • Page 10 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL （2）Maintenance of the electrical equipment only can be carried out by qualified electrician or trainee which is supervised by a qualified electrician according to the electrical rules. a).. The tower crane must be cut off the electricity during maintenance and repair, meanwhile, set up a warning plate of “manned operation, prohibit switch on”...

  • Page 11: Chapter Iii Operation

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Chapter III Operation I. General rules ····························································· 3B-2 II. Operation highlight ···················································· 3B-3 III. Operation instruction ················································· 3B-4 IV. Precautions during operation ······································ 3B-7 1. Each time before operation ·············································· 3B-7 2. During operation ·························································· 3B-7 3.

  • Page 12: General Rules

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Important declaration: A thorough debug must be made upon finishing the installation and erection of the tower crane. The tower crane can only be put into service when it is approved by local safety authorities with the issuance of license.

  • Page 13: Operation Highlight

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL II. Operation highlight Control panel is finishing equipment. It must be careful when operating it. The control lever must be operated slowly when starting or stopping. Change shift one by one, it is forbidden to get over shift.

  • Page 14: Operation Instruction

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL III. Operation instruction （1）Starting a) Check the tower crane before everyday starting according to the instruction regulation. If there is any problem, report it and it is not allowed to start any more.
  • Page 15 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL g) The speed was selected by the weight of load. Heavy load selected low speed (PV) and light load selected high speed (GV). h) Stop moving before operating the stroke limiter. i) Don’t put the hook on ground.
  • Page 16 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL (5) Operating the traveling mechanism a) The traveling speed is selected by the distance of traveling. b) In order to ensure the tower crane safety, when it traveling in the track, the trolley must be at the jib foot;...

  • Page 17: Precautions During Operation

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL IV. Precautions during operation The working environmental temperature of tower crane is: - - - - 20 20 20 20℃ ℃ ℃ ℃ ～ ～ ～ ～ + + + + 40 40 40 40℃ ℃ ℃ ℃ , the max.

  • Page 18: Each Time After Operation

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 3. Each time after operation a). Lift the hook to the top end. b). Drive the trolley to the jib foot, start the weather vane and brake device, to make the jib slewing freely (weather vane effect). If power off, manual operate this device.

  • Page 19: Periodical Inspection Item

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 4. Periodical inspection item 1). Electricity Cycle Inspection item After each erection Half a month ∨ Check the max. supply voltage of tower crane Check that whether the connection of earth ∨ ∨...

  • Page 20: Chapter V Hoisting Winch

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 2). Machinery Cycle Inspection item After each erection Half a month ∨ ∨ Mast verticality and levelness ∨ Visual inspection of gear ring bolt Tighten up of slewing gear ring ∨ ∨ bolt...
  • Page 21 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Traveling ∨ ∨ mechanism ∨ ∨ Cable drum Hydraulic pushing ∨ ∨ Check the hook, hook pin and ∨ ∨ clamping plate Adjust the tensile force of trolley ∨ wire rope ∨ ∨...

  • Page 22: Chapter Viii Safety Device

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 3). Safety device Cycle Inspection item After after each Before everyday work A month changing fall erection ∨ ∨ ∨ ∨ Load limiter ∨ ∨ ∨ ∨ Moment limiter ∨ ∨ ∨ ∨...

  • Page 23: Chapter Xi Slewing Ring

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 4). Lubrication Cycle Inspection item After each erection A month guide pulley of hoisting wire ∨ ∨ rope bearing or axle box of hoisting ∨ drum lubricate the grooved clutch ∨ ∨ Hoisting...

  • Page 24: Operation

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL V. Operation 1. Control panel layout and operating method The cabin equipped with electrical control panel (HF) and seat. There are left control panel and right control panel on both side of the seat (they are also called joystick).
  • Page 25 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL ON THE LEFT CONTROL PANEL: 1). Parallel connection button SH, Graphical symbol , with functions as follows: The button is used in the special case such as telescoping, changing fall, and so on.
  • Page 26 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL THE RIGHT CONTROL PANEL IS EQUIPPED WITH: Power supply button (also horn button,) symbol ; warning light VOI and break button (emergency button) O. To begin with, turn the emergency button to the right till it was sprung out. Then press the power supply start button. The power supply of the tower crane was started (main contactor P of electrical control panel A start work) while the horn hooting and warning light shining.

  • Page 27: Precautions During Operation

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 2. Precautions during operation 1) Observe the safety operation regulations strictly during the operation. The operation which might influence the safety of the crane is absolutely forbidden. For example, raise a load buried in the ground; slings (rope clamps) are not in line with relative requirement or is damaged;...

  • Page 28: Operating Method For Weather Vane Effect

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 3. Operating method for weather vane effect 1) When the crane is out of service, press the button for 1S~2S, which situate in the side of electrical control panel HF (inside the operators cabin), the indicator lamp of weather vane lights up.

  • Page 29: Chapter Iv Power Supply And Schematic Diagram

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Chapter IV Power supply and schematic diagram I. Power supply of the tower crane 1. Power supply Install the electrical equipment of tower crane according to the national standard requirement. ST series tower crane meet the relevant regulations in design and...
  • Page 30 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 2. Earthing Attention：The earth wire of tower crane mustn’t be replaced by fuse or the core of switch and cable. There are three kinds of earthing modes： A. The earth substance adopts the standard earth stake, either use φ33x4.5, 1.5m long steel tube or L70x70,...
  • Page 31 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 3. Power supply capacity and supply voltage requirement The requirement of the lowest power supply capacity for each type of tower crane is determined by the hoisting winch. Because of the different hoisting operating conditions, the requirement of power supply is different.
  • Page 32 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 4. How to see electrical schematic diagrams In the process of installing and service, it often needs to look up the electrical schematic diagram. In order to complete the installing and service work more quickly and accurately, the schematic diagram adopt letter symbols and graphic symbols in coordinate drawing which meanings could be find in the table 4-1-1 and 4-1-2.
  • Page 33 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 5. Electrical schematic diagram symbol description (see table 4-1-1) Table 4-1-1 Symbol Name Symbol Name Start button Stop button Power indicator Left control panel zero switch Right control panel zero horn switch Parallel connection...
  • Page 34 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Symbol Name Symbol Name Power supply contactor Protection relay for loss of for high speed phase and phase sequence Control relay for high XLGV LPV1 Medium speed contactor speed Control breaker for Main power supply switch...
  • Page 35 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Symbol Name Symbol Name Power supply contactor Relay for controlling trolley DPV1 for trolley backwards medium speed Power supply contactor Contactor for controlling for trolley medium trolley blower speed High speed relay for...
  • Page 36 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 6. Electrical schematic diagram figure description (see table 4-1-2) Table 4-1-2 Figure Name Figure Name Connecting terminal (HF box) Connecting terminal (HF box) Connecting terminal (L Panel) Connecting terminal (D box) Connecting terminal (R box)
  • Page 37 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 7. Wiring diagram and list of installing cable for tower crane (see fig. 4-1-1) The consumer can intall the cable according to this electrical schematic diagram (non traveling type of tower crane). SLMO...
  • Page 38 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL The consumer can intall the cable according to this electrical schematic diagram (traveling type of tower crane) SLMO RDMO SLCH SDMO F-DM AL-LM H-AL F-AL R-RM-1 R-RM-2 A-AL Fig. 4-1-1b 4B 10...
  • Page 39 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Chapter five Hoisting winch （ （ （ （ 24PQC15） ） ） ） Symbol instructions: P Q C Single rope pull Mechanism code Motor power (KW) 5B-1...
  • Page 40 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Instruction: Keep the Min vertical speed when the rope pulled tight. Keeps the Min lowering speed when put down the load. Keep the middle speed when started to arise and be about to the end.
  • Page 41 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Ⅰ Ⅰ Ⅰ Ⅰ composing of hoist winch 1. limiter 2. drum 3. reducer 4. undercarriage 5. motor 6. disc brake 7. cool motor Fig. 5－ － － － 1－ － － － 1...
  • Page 42 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 1. Hoisting drum The surface of drum have fold line score in order to limit the across enwind point of the each layer rope on the circle of the roller when reeve the multilayer rope, the two positions is at a distance of 180°, the others parallel reeve with the side...
  • Page 43 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Ⅱ Ⅱ Ⅱ Ⅱ Characteristic parameter working level using grade load condition YSYDE180L－2/4/16 motor type 2800/1400/300 motor speed/min raising speed and load m/min m/min 12mm rope diameter rope capacity of drum 400m 5B-5...
  • Page 44 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Ⅲ Ⅲ Ⅲ Ⅲ working principle of ho isting winch Three speed motor of hoisting winch drive the drum to running by reducer. The electric interlock control panel control the hoisting winch to carry out three raising speed and three lowering speed.
  • Page 45 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL （Ⅱ）. Adjusting air clearance of brake as following: 1. takeoff cover cap (40); 2. Loosening the nut (39) and (45), adjusting the distance between yoke iron of electromagnet (47) and gag bit (59) is 0.7－0.8mm. the clearance tolerance around is less than 0.05mm，After tighten up the nut (39) (45) should check...
  • Page 46 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 29. Bolt 32. Underplate of gag bit 33. Brake holder block 34. Fixing cover of brake 35. Compression spring 37. Spring adjusting nut 39. 45. Eectromagnet adjusting nut 40. Cover cap 46. Bolt 52.
  • Page 47 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL V. Maintenance and servicing of hoisting winch 1. Check carefully according to following table before daily operation: Check item Requirement Oiling according to code designation and oil capacity (18＃ Reducer distillate hyperbolic gear oil )
  • Page 48 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 2. Reducer oiling Pouring orifice Oil level position Reservoir sweep opening Fig. 5-1-3 Filling up the 18＃distillate hyperbolic gear lubricant to the oil level according to the demand. The crane should check the oiliness and oil level position after operated each 200h and filling up the oil to the oil level;...
  • Page 49 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 3. The crane should adjust the clearance between the brake moment of disk brake for motor, brake holder block and brake disc after operated one week. Demanded the brake moment of brake ≥175N.m, the clearance between brakes is 0.8mm. Check the brake whether sensitivity before operate the crane every day.
  • Page 50 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Chapter VI Slewing mechanism I. Explanation of symbols ·························································· 6B-2 II. Composition of slewing mechanism and its working principle ········ 6B-2 III Working principle of controller RTC ······································· 6B-4 IV. Operating and fault clearance of slewing mechanism RTC ············ 6B-5 V.

  • Page 51: Explanation Of Symbols

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL I. Explanation of symbols R T C Locked rotor torque（N.m） Eddy-current speed regulation Variable voltage speed control Slewing mechanism Description: Select the slewing speed according to the required displacement. Accelerate or decelerate the slewing speed gradually. When stopping the jib, speed down first and then stop the slewing operating.
  • Page 52 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL The armature of bow wave brake of the motor runs with shaft. The Electromagnet of bow wave brake produces magnetic field in the air gap δ1 around the armature when the excited loop was supplied with direct current. The armature incises the magnetic field so as to form potential field, and then current (that is bow wave) is obtained.

  • Page 53: Working Principle Of Controller Rtc

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL III Working principle of controller RTC ＋V Eddy-current voltage output clockwise contactor anticlockwise contactor Three phase adjustable AC voltage －V Voltage feedback Control functional block diagram The potentiometer RP in interlock operation desk setting phase shift triggering control voltage of crystal brake tube then could output three circuit signals by the amplifier IC.

  • Page 54: Operating And Fault Clearance Of Slewing Mechanism Rtc

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL IV. Operating and fault clearance of slewing mechanism RTC 1. Notice for operating RTC 1) This slewing mechanism adopts specific slewing controller (electronic block) in control loop. It can automatically ensure the stably acceleration and deceleration when starting up or braking, it also can prevent the tower crane from abnormal running, such as emergency stop, suddenly reversion.
  • Page 55 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 3）There is noise and joggling in the slewing motor. In this condition, power on and check that whether the voltage three phase for motor is lack phase; whether the three phase voltage is balanced. In normal condition, the degree of unbalance for three phase voltage shouldn’t be more than 3%, i.e.
  • Page 56 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 6) positive turn and negative turn contactor(RD or RG) don’t close. First, check the connection whether loosen or broken line; next supply power and check the sliding end of potentiometer RP should have plus minus constant voltage (when the handle operate), if have no voltage output, lookup potentiometer both end point should have plus minus constant voltage, if there isn’t voltage input, the...

  • Page 57: Slewing Brake

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL V. Slewing brake 1. Manual brake release (see fig. 6-4-1) 1) Start the weather vane device: a). Raise the brake lever (1), i.e. act A. b). Push the button (2), and make it stay under the brake lever (1).

  • Page 58: Electric Starting Of Weather Vane Device

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 3. Working principle 1. Brake engaged 2. Brake released Note: “E” is the clearance of brake, which value must be kept between 0.8-1.2mm. Adjust it if necessary. 2. Electric starting of weather vane device Description: It is an electromagnetic brake, which is braked when switched off.

  • Page 59: Service And Maintenance Of Slewing Brake

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 3. Service and maintenance of slewing brake Attention: There shouldn’t be any foreign substance in the brakes (such as cement, sand, grease, etc). 1) Unscheduled maintenance The adjustment and maintenance should be carried out under the following conditions: a).

  • Page 60: Wiring Chart Of R Box

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL VI. Wiring chart of R box (see fig. 6-5-1) HVeM HVeM 11 12 1～4 5、6 7～9 11～14 15、16 19～22 Terminal strip for the connecting box of slewing center (R box) Terminal Terminal 47、48、49、46 1～9、11～16...
  • Page 61 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Chapter VII Trolley winch I. Explanation of symbols ························································· 7B 7B 7B 7B-2 2 2 2 II. Composition of trolley winch and its working principle ················ 7B 7B 7B 7B-3 3 3 3 III.
  • Page 62 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL I. Explanation of symbols D T C Locked rotor torque Eddy-current speed regulation Variable voltage speed control Trolley winch Description: The trolley speed should be selected in accordance with the trolley distance. It is...
  • Page 63 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL II. Composition of trolley winch and its working principle Trolley mechanism DTC consists of a drum, a planetary reduction gear and an torque motor on which shaft extension end, and rear end respectively equipped with a bow wave brake and a disc brake supplied with direct current, (see Fig.7-1-1).
  • Page 64 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 15 14 Fig. 7-2-1 1. Outer support plate 2. Connecting bar 3. Drum and cabinet for reducer 4. Pinion for travel switch 5. Inner support plate 6. Travel switch DXZ-4/FW 7. Eddy-current brake for motor, exciting voltage DC20V 8.
  • Page 65 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL III. Trolley brake (see fig. 7-3-1) Description: It is an electromagnetic brake, which is braked when switched off. It has independent power supply. 1. Working principle of trolley brake 1. Exciting coil 2. Spring 3.
  • Page 66 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 2. Maintenance a). Every 200 hours or every one month once. b). Check the clearance and brake moment, as well as the worn condition of the brake disc, replace it if necessary. c). Don’t replace the brake until it worn out completely.
  • Page 67 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL The motion procedure diagram for relay and contactor of trolley winch RXDAr 档 SDAv SDM0 RDM r RXDAv SDAr Attracting when power on Keep former attracting state Release when power down...
  • Page 72 LAYOUT OF HOIST/SUPPLY POWER TSFuP TSFu1 RedFu RedFu1 TSLA Circuit- Circuit- Circuit- Circuit- Circuit- Circuit- Rectifying Transformer breaker breaker breaker breaker breaker breaker diode XLPV Control relay Control relay Control relay Control relay AC contactor Control 3 Phase relay contactor Auxiliary relay AC contactor...
  • Page 73 ELECTRIC PARTS LIST OF HOIST/SUPPLY POWER Q’ty Symbol Name TSLA Transformer Auto circuit-breaker TSFUP、 TSFU1、 RedFU1、RedFU、LFU、 Circuit-breaker Rectifying diode 3 Phase contactor P、LH、LD、LMV、LPV、LGV、LFa AC contactor CXL、XP、XL、SH、XLPV Control relay Connecting XLPV、LPV、LD、LH、LGV、 Auxiliary relay Terminal strip Button A/HF Socket...
  • Page 78 LAYOUT OF SLEWING/TROLLEY Red2 Control transformer Diode Diode Control transformer DMV1 DPV1 Power circuit Forward Back Low speed Low speed Mid speed Mid speed Trolley relay (high contactor contactor contactor contactor contactor contactor breaker of speed) trolley of trolley of trolley of trolley of trolley of trolley...
  • Page 79 ELECTRIC PARTS LIST OF SLEWING/TROLLEY Q’ty Symbol Name TS1 , TS2 , TS3 Transformer red , red2 Rectifying diode TsFUP , TsFU1 , RedFU , RedFU1 Circuit-breaker RDi , FADi , DDi , GtDi DAV , DAR , DPV , DMV1 , RD , AC contactor RG , DMV , RFS , PD , XRi1 SD , DGV , DPV1 , DFA , XRi2 , XRa1 ,...
  • Page 80 CADi：变压器断路器 Safety Transformer Circuit Breaker CATS：变压器 X E g Safety Transformer XEc ：司机室灯开关 Control Cab Lighting X E c X E g X C F AC 220v Ec ：司机室灯 Cab Lighting XEg ：雨刷器开关 50(A) 51(B) 53(T) 106 107 100 101 100 101 F(K) Control Windscreen Wipe...
  • Page 81 4 8 V SLCL MONITOR H O I S T R A D I U S L O A D C E L L M O N I T O R L M M LOAD-D333A DISPLAY WIRING DIAGRAM DRAWING MARK WEIGHT SCALE IND NUMBER DOC.NO.
  • Page 82 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Chapter VIII Safety device I. Introduction······································································· 8B-2 II. Hoisting limiter ································································· 8B-3 1. Purpose ············································································· 8B-3 2. Working principle ································································· 8B-3 3. Adjustment ········································································· 8B-4 III. Slewing limiter ··································································· 8B-5 1. Purpose ············································································· 8B-5 2.

  • Page 83: Introduction

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL I. Introduction The safety devices of tower crane are important devices which can ensure the safety of person and equipment。 Among the safety devices, the moment limiting device and load limiting device set a guard line for protecting the crane from overturning and rope broken.

  • Page 84: Hoisting Limiter

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL II. Hoisting limiter 1. Purpose Hoisting limiter is a device which can avoid any possible operation error. a). Stop hoisting motion when the hook block is 1-2m apart from the trolley. b). When lowering the hook block, prevent the wire rope from completely unwinding or winding up in reverse direction onto the drum.

  • Page 85: Adjustment

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 3. Adjustment After the tower crane reaches the expected working height: Adjustment must be carried out with no load. Hoisting or lowering the hook, and operate the contact A or D manually, so as to confirm the contact which cutting off the controlling motion.

  • Page 86: Slewing Limiter

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL III. Slewing limiter 1. Purpose This device is used for tower crane which without collector. It can prevent the electric cables from twisting and damage. When installed the slewing limiter, the max. slewing circle is 3.

  • Page 87: Adjustment

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 3. Adjustment Adjustment must be carried out with no load. Operate the “left slewing” or “right slewing”, and operate the contact A manually, so as to confirm the contact which cutting off the controlling motion.

  • Page 88: Trolley Limiter

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL IV. Trolley limiter 1. Purpose The trolley limiter can prevent the operation error and keep a safety distance between the trolley and jib nose or jib foot. 2. Working principle The trolley limiter is with a reduction gear, which is engaged with the gear ring on the drum via a pinion.

  • Page 89: Adjustment

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 3. Adjustment 1) Adjusting (trolley out and decelerate) safety device (RDAv): drive the trolley to a distance of 1.5m from the jib nose buffer. Turn cam (3) until it depresses the corresponding contact (4).

  • Page 90: Moment Limiter

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL V. Moment limiter Fig. 8-5-1 The adjustment for device A, C and D Loosen the nut (1), and turn the bolt (2) until it touches the contact (3) and pressing the switch contact. After accurate adjustment, lock nut (1).

  • Page 91: Purpose

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 1. Purpose The tower crane is calculated and designed according to constant maximum load moment. During the operation, it is forbidden to exceed the load moment. The moment limiter is a device to inspect hoisting and trolleying motion so as to prevent the crane from accident on account of overload.

  • Page 92: Adjustment

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 3. Adjustment Light load Over load SLMO A (fixed radius, variable load) SDMO C (fixed load, variable radius) RDMO D (variable radius, deceleration) 1. Elastic plate 2. Limit switch 3. Adjusting bolts 4. Moment housing 5.
  • Page 93 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Table 8-5-1 1. Adjusting the hoisting moment limiter SLMO 1). Drive the trolley to the jib nose, and lift the specified load X with rated speed in 2 falls according to the jib length (adjust device A) 2).

  • Page 94: Load Limiter

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL VI. Load limiter 1. Purpose The structure and hoisting winch of the crane are calculated and designed in accordance with maximum load. It is not permitted that working load exceeds the maximum load. The load limiter MSWL is a safety device to prevent the crane from overload.
  • Page 95 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Table 8-6-1 Adjusting the speed limiter（ （ （ （ SLCHGV） ） ） ） 1. Lift load V with low speed (PV), and then hoisting with high speed. 2. Adjusting bolt (1) until the bolt head touches the sensitive switch (2).
  • Page 96 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Load table for max. working load limiter: Table 8-6-2 SLChGV SLChPV (MV) V（10N） W（10N） X（10N） Y（10N） 1500 1650 3000 3300 24QPC15 3000 3300 6000 6600 Adjusting load and radius table for the moment limiter...

  • Page 97: Anemoscope

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL ANEMOSCOPE VII. 1. Technical specifications 1.1 Power source：48VAc/50Hz; 1.2 starting wind speed≤1.5m/s; 1.3 display≤±3%; 2. Site humidity ranges 2.1 wind speed detector：-40--+50℃；0--100%RH 2.2 display：-20--+50℃；0-70%RH。 3. Operation principals and instructions for use 3.1 Operation principals The wind sensor and the display are powered by three power cables.
  • Page 98 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 4. Tuning and repair 4.1 The electrical circuit inside the wind display has already been adjusted, so there in no need for further tuning. In the event of sufficient depreciation and /or rough transport conditions, the display can be inaccurate, or the preset limit can be biased.

  • Page 99: Chapter Ix Hydraulic System

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Chapter IX Hydraulic system I. Composition of hydraulic pump station ·································· 9B-2 II. Basic technical parameter ·················································· 9B-3 III. Working principle ·························································· 9B-4 IV. Operating and maintenance ··············································· 9B-6 V. The common failure reason and its clearance ··························· 9B-8...

  • Page 100: Composition Of Hydraulic Pump Station

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL The hydraulic system of ST series tower crane is composed of: hydraulic pump station, telescoping cylinder, joining hose and so on. I. Composition of hydraulic pump station It mainly makes up of oil box, filter, motor, oil pump, combination reversing valve, pressure limiting valve and pressure gauge.

  • Page 101: Basic Technical Parameter

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL II. Basic technical parameter Hydraulic oil N46 antiwear hydraulic oil or 40thickened oil volume for oil box Motor power Max. working pressure for 20MPa telescoping Oil pump capacity 8.4L/mm Φ160mm Cylinder inner diameter Piston rod diameter Φ110mm...

  • Page 102: Working Principle

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL III. Working principle Driving the oil pump by joint slack after motor starting, then the oil pump makes fat liquor from oil box to telescoping cylinder pass through the filter, combine change valve and high pressure glue pipe assembly.
  • Page 103 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Main power supply Electromagnetic starter Motor Electrical principle for pump station The combine change valve in the middle position H, the opening P and opening T are joined, the output hydraulic oil of the oil pump went back, the hydraulic system in unload condition at that moment.

  • Page 104: Operating And Maintenance

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL IV. Operating and maintenance 1. Connect the motor’s main power supply exactly; make the motor wheeling comply with counter-clockwise (check the motor’s turning by point movement method) observed from shaft extent direction. Open the cover of the hydraulic air filter and fill the clean and appointed hydraulic oil from it;...
  • Page 105 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 3. Observe whether the oil is curdle if the hydraulic system disuse long time. Hydraulic system is made contact and operated period of time (no load) each two or three months. The cylinder and pump are proceeding the hydraulic cycle to filled oils with its surface to have no rust and protect pump, valve and cylinder.

  • Page 106: The Common Failure Reason And Its Clearance

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL V. The common failure reason and its clearance 1) The cylinder shakes heavily when it lowering. The mast will swinging if it shakes badly. Reason: The adjustment of throttle valve for oil return circuit is unsuitable.
  • Page 107 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Ⅹ Ⅹ Ⅹ Ⅹ CHAPTER FIXING AND TESTING RULES FOR WIRE ROPE I. Explanation ································································ 10B-2 II. Fitting wire rope ························································· 10B-2 1. Fitting new wire rope ··············································· 10B-2 III. Maintenance ····························································· 10B-4 IV.

  • Page 108: Fitting Wire Rope

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Ⅰ Ⅰ Ⅰ Ⅰ . Description: Although its structure is compact and its appearance is strong, the fatigues and wear of wire rope is unavoidable. The worn and aging wire rope will damaged rapidly, which would result in severe accidents (both on person and equipment) if the users do not pay special attention to it.
  • Page 109 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 2） ） ） ） Check the length of wire rope . 3） ） ） ） Enwind the wire rope on the drum by means of a sling and fasten it with bulldog grips. The length of the wire rope’s jut from the last bulldog grip is no less than 3cm (the tightening moment of the screws of bulldog grip is 9 mdaN).

  • Page 110: Maintenance

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Ⅲ Ⅲ Ⅲ Ⅲ . Maintenance Maintenance of wire rope depends on the purpose of tower crane, the working environment as well as the kind of wire rope used. If possible, the wire rope should be...

  • Page 111: Inspection Places

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL tower crane》 》 》 》 ; b. Types of tower crane and it working environment; c. Working level of tower crane; d. The results of the tests before and the defects found. e. Working time of the wire rope since its initial use.

  • Page 112: Checking Places Around Crown Block And Fixed-Points

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Check for broken rope. d). Check for erosion on the wire rope. e). Check for distortion caused by adding load suddenly. Fixed pulley Fixed point Drum Movable block Load 3. Checking places around crown block and fixing points:...
  • Page 113 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 4. Internal inspection of the wire rope It draws a conclusion from the experience of inspection and discard as useless of wire rope that internal damage is mainly caused by the erosion and fatigues that is the primary reason of wire rope invalidation.

  • Page 114: The Discard As Useless Standard Of Rope

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL VI. The discard as useless standard of rope 1. The quality and quantity of broken rope For six layers and eight layers of ropes, broken rope mostly occurs on the appearance. And that is difference to wire rope of multi wall wire of rope, broken rope of this wire rope occurs inside but not to view.

  • Page 115: Rope End Broken Wire

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 2. Rope end broken wire When the rope broken wire at rope end or round, it indicate this part have high stress even have a litter, maybe arose by rope end setting incorrect, should found out the reason for damage.

  • Page 116: Flexibility Decrease

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 7. Flexibility decrease: In some condition (generally relate to the working environment), the flexibility of rope shall decrease observably; it’s not safe if use continue. Generally accompany follow phenomena: a).The rope diameter minish: b).Extending length of lay for rope...

  • Page 117: Outside And Inside Corrosion

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL attrition reach diameter 40% and even not found the broken fiber when the rope diameter decrease 7% or more relative to nominal diameter. 9. Outside and inside corrosion: a).Outside corrosion: The corrosion outside the rope can observe by naked eye. The rope should discard as useless when the surface appears chasm and rope quite loosens.

  • Page 118: Equipment Condition For Relevant Rope

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Ⅶ Ⅶ Ⅶ Ⅶ . Equipment condition for Relevant rope Should periodic check the enwind drum and pulley in order to make these parts well running on bearing. Dig or locked pulley or turn part arouse rapid aggregative wear out and uneven so result in the rope serious abrasion.

  • Page 119: Appendix: Common Wire Rope Defects

    STT113 TOWER CRANE OPERATION AND SERVICE MANUAL APPENDIX COMMON WIRE ROPE DEFECTS Wire rope defects requiring immediate replacement and their causes are depicted in the following figures: Individual wires bend up and protrude through the strands: serious defect caused by stress changing.
  • Page 120 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Chapter XI Slewing ring Periodical inspection for fastening bolt of slewing ring (type 011.40.1120) Frequency of inspection: After the initial 100 hours’ running of the slewing ring, the pre-tension of the bolt should be inspected. Then it should be inspected once every 500 hours running.
  • Page 121 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Table 11 11 11 11- - - - 1 1 1 1 - - - - 1 1 1 1 Bolt class 10.9 Bolt class 12.9 ф （ （ （ （ mm） ） ） ） Diameter Tightening torque (N.m)
  • Page 122 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Chapter XII Tower crane maintenance Every kind of lubricating symbols (see table 12-1-1) Table12-1-1 Code Symbols Type International standard or main characteristic number K-12032-08 Li (Ca) extreme pressure grease NLGIO grade P-01032-60 MOS2 lubricating grease（special purpose）...
  • Page 123 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 1. Running-in period Carry out the first draining of the reduction gears after 450 working hours. 2. Using the grease gun 1) Grease all the articulations without grease nipples (such as door and flap hinges, rods, locks and articulations of the safety devices).
  • Page 124 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Maintenance schedule: C：checking G：lubricating N：oil level R：fillup E：replacing ：checking ：lifetime lubricating H：refueling P：air blasting V：draining 4 5 0 9 0 0 1 9 0 0 7 year 4 5 0 9 0 0...
  • Page 125 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 1. Maintenance on trolley mechanism The following rules should be strictly observed to do any kind of maintenance on trolley: The operator must tie the safety rope（1）. When making maintenance on the brake, the operator must ride on the motor and step on the mechanism pedal（2）.
  • Page 126 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 2. Maintenance on hook: The bearing on the traverse beam of the hook must be greased every 200 hours using calcium based grease. G2 Li (Ca) extreme pressure grease NLGI2 grade 150 hours...
  • Page 127 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 3. Maintenance on rope twist-protector G：Lubricating Ta / Ca extreme pressure grease NLG12 grade 350 hours 3 months 12B-6...
  • Page 128 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 4. Greasing the wire ropes The wire ropes must be greased every 6 months or, in general, each time when they seem to be dry or tend to oxidize. We recommend to lubricate them very moderately using RCF grease and RC grease.
  • Page 129 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL Because of different working environment temperature, hydraulic lubricant of using by Hydraulic unit should be different. The user should be added proper hydraulic oil according to the environment temperature. Number of hydraulic oil environmental -30~-20°C...
  • Page 130 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL The lubricating grease can be selected according to the following table: Lubricating grease Bear Lubricating Working conditions structure position Consistency Name Standard code grade extreme rubber seal pressure low temperature, raceway 1#, 2#...
  • Page 131 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 8. Lubricating for hoisting winch 1). Lubricating for hoisting reducer Fill the lubricating oil before the reducer putting into service, after running 500 hours, drain the oil and fill new oil. After the first time for oiling, replace the oil every 2400 hours.
  • Page 132 STT113 TOWER CRANE OPERATION AND SERVICE MANUAL 9. Manitenance for telescoping cage M: when starting； G: Lubricating 500h 12B-11...
  • Page 133 Fushun Yongmao Construction Machinery Co., Ltd. ： No. 3 Yuanda Road, Shuncheng District, Fushun, Liaoning, P.R. China Ad d . ： 86-413-7648899，7649988 Tel. ： 86-413-7649999 Fax. Postcode ： 113126 ： http//www.yongmao.com.cn Website ： sun@yongmao.com.cn E-mail Manufacture License of Special Equipment No.：TS2410592－2008...

Table of Contents