Hitachi ZW250-6 Wheel Loader Workshop Manual (WNEM50-EN-00)
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Hitachi ZW250-6 Wheel Loader Workshop Manual (WNEM50-EN-00)
- Manual Language:English
- Pages: 852
- Size: 22.8 MB
- Downloadable:Yes
- Format:PDF
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Hitachi ZW250-6 Wheel Loader Workshop Manual (WNEM50-EN-00)
- Attach protectors (soft material) on the corners of the load so that the nylon sling does not directly contact the corners. This will prevent the nylon sling from being damaged and the lifted load from slipping.
- Lower the temperature of the lifted load to lower than 100 °C (212 °F). If the temperature of the lifted load is over 100 °C (212 °F), do not lift the load.
- Do not lift acid or alkali chemicals.
- Take care not to allow the sling to become wet. The load may slip.
- When required to use more than one sling, use slings with the same width and length to keep the lifted load balanced.
- When lifting a load using an eyehole, be sure to eliminate any gaps between the sling and load. (Refer to the right illustration.) Reduce the load weight so that it is less than 80 % of the sling breaking force.
- Avoid using twisted, bound, connected, or hitched slings.
- Do not place any object on twisted or bent slings. (Refer to the right illustration.)
- When removing the slings from under the load, take care not to damage the nylon slings. Avoid contact with protrusions.
- Avoid dragging slings on the ground, throwing slings, or pushing slings with a metal object.
- When using with other types of slings (wire rope) or accessories (shackle), protect the joint so that the nylon sling is not damaged.
- Store the nylon slings indoors so that they won’t deteriorate with heat, sun light, or chemicals.
Table Of Contents:
Hitachi ZW250-6 Wheel Loader Workshop Manual (WNEM50-EN-00)
WNEM50-EN-00.......................................................................... 1 SECTION 1 GENERAL..................................................................... 3 Group 1 Precautions for Disassembling and Assembling.............................. 5 Precautions for Disassembling and Assembling.................................. 5 Group 2 Tightening................................................................ 11 Tightening Bolts and Nuts..................................................... 11 Piping Joint.................................................................. 14 Group 3 Painting.................................................................. 21 Group 4 Bleeding Air.............................................................. 29 Bleed Air from the Hydraulic System........................................... 29 Bleed Air from the Fuel System................................................ 30 Bleeding Air from Brake (Axle)................................................ 31 Group 5 Preparation............................................................... 33 Preparations for Inspection and Maintenance................................... 33 Releasing Pressure from Front Attachment Hydraulic Circuit.................... 38 Releasing Pressure from Ride Control Accumulator.............................. 39 Releasing Pressure from Parking Brake Accumulator............................. 40 Releasing Pressure from Hydraulic Oil Tank.................................... 41 Releasing Pressure from Reserve Tank.......................................... 42 SECTION 2 MAINTENANCE STANDARD........................................................ 45 Group 1 Body...................................................................... 47 Center Hinge.................................................................. 47 Pilot Valve (Two Lever Type )................................................. 49 Group 2 Front Attachment.......................................................... 51 Pin and Bushing............................................................... 51 Standard Dimensions for Lift Arm and Bucket................................... 53 Cylinder...................................................................... 55 SECTION 3 BODY........................................................................ 59 Group 1 Cab....................................................................... 61 Removal and Installation of Cab............................................... 61 Group 2 Counterweight............................................................. 93 Removal and Installation of Counterweight..................................... 93 Group 3 Center Hinge.............................................................. 97 Removal and Installation of Center Hinge...................................... 97 Group 4 Engine....................................................................123 Removal and Installation of Engine............................................123 Group 5 Radiator Assembly.........................................................163 Removal and Installation of Radiator Assembly.................................163 Group 6 Hydraulic Oil Tank........................................................181 Removal and Installation of Hydraulic Oil Tank................................181 Group 7 Fuel Tank.................................................................191 Removal and Installation of Fuel Tank.........................................191 Group 8 Pump Device...............................................................203 Removal and Installation of Pump Device.......................................203 Disassembly of Pump Device....................................................213 Assembly of Pump Device.......................................................215 Disassembly of Main Pump......................................................217 Assembly of Main Pump.........................................................221 Disassembly of Regulator......................................................227 Assembly of Regulator.........................................................229 Disassembly of Priority Valve.................................................231 Assembly of Priority Valve....................................................233 Structure of Pilot Pump.......................................................235 Group 9 Control Valve.............................................................237 Removal and Installation of Control Valve.....................................237 Disassembly of Control Valve..................................................247 Assembly of Control Valve.....................................................254 Group 10 Pilot Valve..............................................................263 Removal and Installation of Pilot Valve (Single Lever Type)...................263 Removal and Installation of Pilot Valve (Two Lever Type)......................271 Disassembly of Pilot Valve (Single Lever Type)................................283 Assembly of Pilot Valve (Single Lever Type)...................................286 Disassembly of Pilot Valve (Two Lever Type)...................................291 Assembly of Pilot Valve (Two Lever Type)......................................297 Group 11 Brake Charge Valve.......................................................305 Removal and Installation of Brake Charge Valve................................305 Structure of Brake Charge Valve...............................................313 Removal and Installation of Brake Accumulator.................................315 Group 12 Manifold Valve...........................................................321 Removal and Installation of Manifold Valve....................................321 Disassembly of Manifold Valve.................................................329 Assembly of Manifold Valve....................................................332 Group 13 Solenoid Valve...........................................................337 Removal and Installation of 2-Spool Solenoid Valve Unit.......................337 Structure of 2-Spool Solenoid Valve Unit......................................341 Removal and Installation of Parking Brake Solenoid Valve Unit.................343 Structure of Parking Brake Solenoid Valve Unit................................349 Structure of Parking Brake Solenoid Valve.....................................351 Group 14 Flow Regulator Valve.....................................................353 Removal and Installation of Flow Regulator Valve..............................353 Structure of Flow Regulator Valve.............................................357 Group 15 Cooling Fan System.......................................................359 Removal and Installation of Fan Valve.........................................359 Structure of Fan Valve........................................................363 Removal and Installation of Fan Motor.........................................365 Structure of Fan Motor........................................................371 Removal and Installation of Pilot Pump........................................373 Disassembly of Pilot Pump.....................................................379 Assembly of Pilot Pump........................................................381 Group 16 Ride Control Accumulator.................................................385 Removal and Installation of Ride Control Accumulator..........................385 Group 17 Battery Disconnect Switch................................................389 Removal and Installation of Battery Disconnect Switch.........................389 Group 18 Aftertreatment Device....................................................395 Removal and Installation of Aftertreatment Device.............................395 Group 19 DEF Tank.................................................................421 Removal and Installation of DEF Tank..........................................421 Group 20 Coolant Control Valve....................................................429 Removal and Installation of Coolant Control Valve.............................429 Group 21 DEF Supply Module........................................................435 Removal and Installation of DEF Supply Module.................................435 Group 22 Exterior Components......................................................439 Removal and Installation of Exterior Components...............................439 SECTION 4 TRAVEL SYSTEM...............................................................499 Group 1 Tire......................................................................501 Removal and Installation of Front Tire........................................501 Removal and Installation of Rear Tire.........................................505 Group 2 Drive Unit................................................................509 Removal and Installation of Drive Unit........................................509 Disassembly and Assembly of Drive Unit........................................517 Removal and Installation of Torque Converter..................................523 Disassembly and Assembly of Transmission......................................527 Disassembly and Assembly of Transmission Control Valve........................577 Removal and installation of parking brake (Replace the brake friction pad)....593 Group 3 Axle......................................................................603 Removal and Installation of Front Axle........................................603 Removal and Installation of Rear Axle.........................................613 Disassembly of Axle...........................................................629 Assembly of Axle..............................................................645 Group 4 Propeller Shaft...........................................................671 Removal and Installation of Propeller Shaft...................................671 Group 5 Brake Valve...............................................................683 Removal and Installation of Brake Valve.......................................683 Disassembly of Brake Valve....................................................689 Disassembly of Brake Valve....................................................690 Assembly of Brake Valve.......................................................691 Assembly of Brake Valve.......................................................692 Group 6 Steering Device...........................................................695 Removal and Installation of Steering Pilot Valve..............................695 Disassembly of Steering Pilot Valve...........................................701 Assembly of Steering Pilot Valve..............................................704 Removal and Installation of Steering Valve (Without Emergency Steering).......709 Removal and Installation of Steering Valve (With Emergency Steering)..........717 Disassembly of Steering Valve.................................................725 Assembly of Steering Valve....................................................728 Disassembly of Emergency Steering Check Block.................................731 Assembly of Emergency Steering Check Block....................................733 Removal and Installation of Steering Cylinder.................................735 Disassembly of Steering Cylinder..............................................757 Assembly of Steering Cylinder.................................................761 Removal and Installation of Steering Accumulator..............................767 Removal and Installation of Left Stop Valve...................................771 Removal and Installation of Right Stop Valve..................................777 Disassembly of Stop Valve.....................................................783 Assembly of Stop Valve........................................................784 Group 7 Emergency Steering Device.................................................785 Removal and Installation of Emergency Steering Pump...........................785 SECTION 5 FRONT ATTACHMENT............................................................795 Group 1 Front Attachment..........................................................797 Removal and Installation of Front Attachment..................................797 Removal and Installation of Bell Crank........................................807 Removal and Installation of Bucket............................................815 Removal and Installation of Bushing...........................................819 Group 2 Cylinder..................................................................823 Removal and Installation of Lift Arm Cylinder.................................823 Removal and Installation of Bucket Cylinder...................................831 Disassembly of Lift Arm Cylinder and Bucket Cylinder..........................843 Assembly of Lift Arm Cylinder and Bucket Cylinder.............................847
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