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Lift Pump and Motor Repair

2000 SRM 1025

1.

MOTOR

2.

COUPLING

3.

HYDRAULIC RESERVOIR

4.

CLAMP

5.

DRAIN PLUG AND O-RING

6.

BREATHER/FILLER CAP

7.

VALVE BLOCK

8.

PROPORTIONAL VALVE (LOWERING)

9.

PUMP

10. TUBE
11. PRESSURE RELIEF VALVE
12. CHECK VALVE
13. SCREW
14. RESERVOIR MOUNTING BRACKET
15. SCREWS
16. SCREWS
17. CAPSCREWS

Figure 5. Lift Pump and Motor Assembly-Without Auxiliary (W30/40ZA)

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Содержание W20-30ZR

Страница 1: ...WALKIE HIGH LIFT HYDRAULIC SYSTEM W30 40ZA B453 W20 30ZR B455 W25 30 40ZC B454 PART NO 1524251 2000 SRM 1025...

Страница 2: ...condition Always use HYSTER APPROVED parts when making repairs Replacement parts must meet or exceed the specifications of the original equipment manufacturer Make sure all nuts bolts snap rings and...

Страница 3: ...ssemble Pump 12 Install Pump Motor 12 Install Reservoir to Pump 12 Install Lift Pump and Motor Assembly 12 Valve Repair 13 Proportional Valve Lowering 13 Remove 13 Install 13 Directional Valve 14 Remo...

Страница 4: ...High Lift Hydraulic System TABLE OF CONTENTS Continued Bleed Hydraulic System 22 Troubleshooting 22 Hydraulic Diagrams and Schematics 25 This section is for the following models W30 40ZA B453 W20 30ZR...

Страница 5: ...to return to the reservoir and the forks lower Rate of flow is regulated by how far the valve opens The lift cylinder s rod extends to raise the forks through a series of mast channels and chains The...

Страница 6: ...es can cause pump noises due to cavitation Aerated hydraulic oil Results in system noise that is similar to cavitation Aerated oil is caused by the ingestion of air through the pipe joints of the inle...

Страница 7: ...the lift pump and mo tor assembly and is replaceable but not adjustable When the operator selects a hydraulic function by pressing a button on the control handle a signal is sent to the traction lift...

Страница 8: ...mechanism or load during the manual lowering procedure Verify that there are no obstructions beneath the lift mechanism or load If the mast does not lower when the man ual lowering valve is activated...

Страница 9: ...2000 SRM 1025 Manual Lowering Figure 2 Single Function Manual Lowering Screw Top View 5...

Страница 10: ...bling the hydraulic pump and mo tor assembly An electric motor drives the hydraulic pump It may be removed without removing the en tire assembly from the drive unit compartment or hy draulic unit comp...

Страница 11: ...an be injected into the body by pressure To prevent possible injury shield yourself from any escaping oil Wrap a rag around the fitting and loosen the fitting and loosen the connection slowly CAUTION...

Страница 12: ...MP 5 DRAIN PLUG AND O RING 6 BREATHER FILLER CAP 7 VALVE BLOCK 8 PROPORTIONAL VALVE LOWERING 9 PUMP 10 TUBE 11 PRESSURE RELIEF VALVE 12 CHECK VALVE 13 SCREW 14 RESERVOIR MOUNTING BRACKET 15 SCREWS 16...

Страница 13: ...RING 7 MAIN VALVE BLOCK 8 PLUG 9 PROPORTIONAL VALVE LOWERING 10 LIFT VALVE AND COIL 11 CAPSCREWS 12 BREATHER FILLER CAP 13 SCREW 14 AUXILIARY VALVE BLOCK 15 DIRECTIONAL VALVE 16 TUBES 17 PRESSURE REL...

Страница 14: ...7 CLAMPS AND O RING 8 MAIN VALVE BLOCK 9 PROPORTIONAL VALVE LOWERING 10 LIFT VALVE AND COIL 11 BREATHER FILLER CAP AND ELBOW 12 SCREW 13 PLUG 14 AUXILIARY VALVE BLOCK 15 VALVE TILT 16 VALVE SIDESHIFT...

Страница 15: ...contamination Clean and flush the hydraulic reservoir as necessary Remove Pump Motor 1 If the lift pump and motor assembly has not been previously removed perform steps 1 through 6 in Remove Lift Pump...

Страница 16: ...ing and torque to 22 N m 16 lbf ft Install Pump Motor 1 Lubricate the motor output shaft and the pump input shaft with a light coating of multi purpose 2 grease with 2 to 4 molybdenum disulfide 2 Inst...

Страница 17: ...aulic compartment cover 6 Discharge the capacitor See Special Precau tions WARNING Hydraulic oil hoses and lines may be under high pressure Hydraulic oil can be injected into the body by pressure To p...

Страница 18: ...ways install caps on the hoses and ports of the pump 7 Tag and disconnect any power wires or hydraulic hoses blocking access to the valve 8 Tag and identify the control wiring plugs and valve coils 9...

Страница 19: ...the coil 10 Remove the upper O ring and slide the coil off the valve cartridge 11 Remove the lower O ring from the valve car tridge 12 Remove the valve cartridge Install 1 Verify that the valve cartri...

Страница 20: ...hield yourself from any escaping oil Wrap a rag around the fitting and loosen the fitting and loosen the connection slowly 8 Loosen both hydraulic hose fittings on the bottom of the valve block to rel...

Страница 21: ...NG Hydraulic oil hoses and lines may be under high pressure Hydraulic oil can be injected into the body by pressure To prevent possible injury shield yourself from any escaping oil Wrap a rag around t...

Страница 22: ...ing the mounting bracket to the isolators and tilt the lift pump and motor assembly away from the frame 9 Slowly loosen the relief valve cartridge to relieve pressure 10 Remove the relief valve cartri...

Страница 23: ...ure See Figure 11 Item 1 9 Remove the check valve cartridge Install 1 Verify that the valve cartridge O rings are not damaged Replace as needed 2 Verify that the valve cartridge and valve block are cl...

Страница 24: ...jected into the body by pressure To prevent possible injury shield yourself from any escaping oil Wrap a rag around the fitting and loosen the fitting and loosen the connection slowly 10 Loosen the se...

Страница 25: ...r 5 Turn key switch to OFF position and disconnect battery 6 Block load wheels to prevent lift truck from mov ing Refer to Periodic Maintenance 8000 SRM 1027 7 Discharge the capacitor See Special Prec...

Страница 26: ...Hydraulic System 1 Loosen buttonhead screw near top of cylinder 2 Connect battery and turn key switch to ON posi tion 3 Briefly press and release Lift button repeatedly until hydraulic oil flows from...

Страница 27: ...lief valve is stuck open Clean adjust or replace the relief valve The pump has low output The pump is worn Check repair or install new parts as required Seals or gaskets are damaged and cause leaks In...

Страница 28: ...ervoir is low Fill reservoir to correct level Check for leaks Lift lower coil is defective Measure the resistance on the coil and replace if not correct EV1 17 7 EV2 22 5 Lift lower cartridge is defec...

Страница 29: ...and Schematics Hydraulic Diagrams and Schematics 1 LIFT PUMP AND MOTOR ASSEMBLY 2 PROPORTIONAL LOWERING VALVE 3 HOSE ASSEMBLY 4 FITTING 5 TUBE AND NUT ASSEMBLY 6 RELIEF VALVE Figure 13 Hydraulic Diagr...

Страница 30: ...0 SRM 1025 1 LIFT PUMP AND MOTOR ASSEMBLY 2 FITTING 3 HOSE ASSEMBLY 4 FITTING 5 TUBE AND NUT ASSEMBLY 6 FITTING 7 HOSE ASSEMBLY 8 FITTING 9 LIFT VALVE 10 PROPORTIONAL LOWERING VALVE Figure 14 Hydrauli...

Страница 31: ...SSEMBLY 12 FITTING 13 VALVE ASSEMBLY 14 FITTING 15 HOSE ASSEMBLY 16 HOSE ASSEMBLY 17 FITTING 18 EXTEND RETRACT CYLINDER 19 VALVE ASSEMBLY 20 FITTING 21 HOSE ASSEMBLY 22 HOSE ASSEMBLY 23 O RING 24 FITT...

Страница 32: ...FITTING 6 FITTING 7 HOSE ASSEMBLY 8 HOSE ASSEMBLY 9 HOSE ASSEMBLY 10 FITTING 11 FITTING 12 HOSE ASSEMBLY 13 C B VALVE ASSEMBLY 14 FITTING O RING 15 FITTING O RING 16 FITTING 17 FITTING 18 FITTING 19...

Страница 33: ...________________________________________ ____________________________________________________________ ____________________________________________________________ _____________________________________...

Страница 34: ...Hydraulic Diagrams and Schematics 2000 SRM 1025 30...

Страница 35: ...2000 SRM 1025 Hydraulic Diagrams and Schematics Figure 17 Hydraulic Schematic W30 40ZA Without Side shift 31...

Страница 36: ...Hydraulic Diagrams and Schematics 2000 SRM 1025 32...

Страница 37: ...2000 SRM 1025 Hydraulic Diagrams and Schematics Figure 18 Hydraulic Schematic W30 40ZA With Side shift 33...

Страница 38: ...Hydraulic Diagrams and Schematics 2000 SRM 1025 34...

Страница 39: ...2000 SRM 1025 Hydraulic Diagrams and Schematics Figure 19 Hydraulic Schematic W20 30ZR Without Side shift 35...

Страница 40: ...Hydraulic Diagrams and Schematics 2000 SRM 1025 36...

Страница 41: ...2000 SRM 1025 Hydraulic Diagrams and Schematics Figure 20 Hydraulic Schematic W20 30ZR With Side shift 37...

Страница 42: ...Hydraulic Diagrams and Schematics 2000 SRM 1025 38...

Страница 43: ...2000 SRM 1025 Hydraulic Diagrams and Schematics Figure 21 Hydraulic Schematic W25 30 40ZC With Side shift 39...

Страница 44: ...Hydraulic Diagrams and Schematics 2000 SRM 1025 40...

Страница 45: ...2000 SRM 1025 Hydraulic Diagrams and Schematics Figure 22 Hydraulic Schematic W25 30 40ZC With Side shift and Aux 41...

Страница 46: ...________________________________________ ____________________________________________________________ ____________________________________________________________ _____________________________________...

Страница 47: ......

Страница 48: ...TECHNICAL PUBLICATIONS 2000 SRM 1025 5 03 4 03 2 03 Printed in U S A...

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