Hyster D174 Service & Repair Manual
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Hyster D174 Service & Repair Manual

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Hyster D174 (R30XMS2) Forklift

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  • Page 1 Hyster D174 (R30XMS2) Forklift...
  • Page 2 C024]; S3.00-5.50E (S60-120E); H60-110E; H360-620B; H16.00-30.00C (H360-650C); H36.00-48.00C/E (H800-1050C/E) [D117]; H7.00-12.50H (H150-275H); H13.50-16.00B (H300-350B); H32.00-42.00B (H700-920B); J25-35A/AS; J40-60A; E20-50B; E3.00-5.50B (E60-120B); H6.00-7.00XL (H135-155XL, H135-155XL ) [F006, G006]; H40-60H; R30XMS2 [D174]; R30XM2, R30XMA2, R30XMF2 [G118]; H2.00-3.00J (H40-60J) PART NO. 910091 1900 SRM 97...
  • Page 3 • Use the correct tools for the job. • Keep the tools clean and in good 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 other fastening devices are removed before using force to remove parts.
  • Page 4 Thanks very much for your reading, Want to get more information, Please click here, Then get the complete manual NOTE: If there is no response to click on the link above, please download the PDF document first, and then click on it. Have any questions please write to me: admin@servicemanualperfect.com...

  • Page 5: Table Of Contents

    ) [B024, C024]; S3.00-5.50E (S60-120E); H60-110E; H360-620B; H16.00-30.00C (H360-650C); H36.00-48.00C/E (H800-1050C/E) [D117]; H7.00-12.50H (H150-275H); H13.50-16.00B (H300-350B); H32.00-42.00B (H700-920B); J25-35A/AS; J40-60A; E20-50B; E3.00-5.50B (E60-120B); H6.00-7.00XL (H135-155XL, H135-155XL ) [F006, G006]; H40-60H; R30XMS2; [D174]; R30XM2, R30XMA2, R30XMF2; [G118]; H2.00-3.00J (H40-60J) ©2003 HYSTER COMPANY...
  • Page 6 "THE QUALITY KEEPERS" HYSTER APPROVED PARTS...

  • Page 7: Description

    1900 SRM 97 Description Description Gear pumps have several sections and are made with All the gear pumps have devices that keep the a single set (single stage) of gears or with multiple thrust clearance at a minimum when the pressure sets (tandem) of gears.

  • Page 8: Operation

    Operation 1900 SRM 97 Operation Gear pumps have the teeth of the gears engaged in the center of the pump. When the input shaft is turned, the drive gear turns the driven gear. See Fig- ure 2. The oil in the inlet chamber is moved out from the center by the teeth of rotating gears.

  • Page 9: Relief Valve

    1900 SRM 97 Hydraulic Gear Pump Repair RELIEF VALVE Some pumps have a relief valve installed in a car- tridge or in a bore in the rear cover. See Figure 4. Relief valves in the pump prevent the pressure in the controlled flow system from increasing beyond the specifications.

  • Page 10: Disassemble

    Hydraulic Gear Pump Repair 1900 SRM 97 DISASSEMBLE Make sure you make careful notes of the location and orientation of the parts and seals during disassem- NOTE: See Figure 6, Figure 7, Figure 8, or Figure 9 bly. Some of the parts are similar, but not exactly for the illustration that is similar to the pump being the same and it can be difficult to make an identifi- repaired.

  • Page 11: Inspect

    1900 SRM 97 Hydraulic Gear Pump Repair NOTE: THERE CAN BE A VARIATION OF INTERNAL PARTS ON DIFFERENT MODELS OF LIFT TRUCKS. 1. CAPSCREW 17. SPACER 2. WASHER 18. O-RING 3. REAR COVER 19. CARTRIDGE 4. DOWEL PIN 20. RELIEF POPPET 5.
  • Page 12 Hydraulic Gear Pump Repair 1900 SRM 97 NOTE: THERE CAN BE A VARIATION OF INTERNAL PARTS ON DIFFERENT MODELS OF LIFT TRUCKS. 1. REAR COVER 9. FRONT COVER 2. SEAL GLAND 10. STUD 3. SEAL RETAINER 11. WASHER 4. WEAR PLATE, REAR 12.
  • Page 13 1900 SRM 97 Hydraulic Gear Pump Repair NOTE: THERE CAN BE A VARIATION OF INTERNAL PARTS ON DIFFERENT MODELS OF LIFT TRUCKS. 1. SNAP RING 11. HOUSING SEAL 2. BEARING 12. GEAR HOUSING 3. SEAL 13. BODY 4. FRONT COVER 14.

  • Page 14: Assemble

    Hydraulic Gear Pump Repair 1900 SRM 97 1. CAPSCREW (4) 10. SEAL (2) 2. GEAR HOUSING 11. BODY 3. PIN (4) 12. GEAR HOUSING 4. DRIVE GEAR 13. DRIVE GEAR AND SHAFT 5. DRIVEN GEAR 14. DRIVEN GEAR AND SHAFT 6.
  • Page 15 1900 SRM 97 Hydraulic Gear Pump Repair 3. Install needle bearings into front and rear covers. 7. Install seal and rear cover. Use a plastic hammer Use a press to push bearings into position. Push to join the sections. Apply a small mount of Loc- ®...

  • Page 16: Install

    Pump Output Check 1900 SRM 97 INSTALL CAUTION Do not permit hot oil to enter a cold pump. CAUTION Make sure the relief valve in each system is at Before the gear pump is installed, loosen the the lowest setting. lock nut on the adjustment screw for the relief valve.

  • Page 17: Method No. 2

    1900 SRM 97 Pump Output Check 1. HYDRAULIC PUMP 5. PRESSURE GAUGE 2. INLET PORT 6. TEE FITTING 3. OUTLET PORT 7. FLOW METER 4. HYDRAULIC TANK 8. NEEDLE VALVE Figure 11. Hydraulic Pump Output Check with Flow Meter METHOD NO. 2 operate the engine when there is no oil in the hydraulic tank.

  • Page 18: Hydraulic System Air Check

    Hydraulic System Air Check 1900 SRM 97 1. HYDRAULIC PUMP 6. TEE FITTING 2. INLET PORT 7. NEEDLE VALVE 3. OUTLET PORT 8. CONTAINER 4. HYDRAULIC TANK 9. TIMER 5. PRESSURE GAUGE Figure 12. Hydraulic Pump Output Check Hydraulic System Air Check If the pump makes noise or does not move the cor- the pump.

  • Page 19: Troubleshooting

    1900 SRM 97 Troubleshooting Troubleshooting PROBLEM POSSIBLE CAUSE PROCEDURE OR ACTION The pump makes too much Air in the hydraulic system. Remove air from hydraulic system. noise. The bearings or gears are damaged. Repair or replace hydraulic pump. Outlet valve from the hydraulic tank Open hydraulic tank outlet valve.
  • Page 20 Troubleshooting 1900 SRM 97 PROBLEM POSSIBLE CAUSE PROCEDURE OR ACTION Breather on hydraulic tank has a re- Replace hydraulic tank breather. hydraulic pressure. (Cont.) striction. Seal for pump shaft is damaged. Replace pump shaft seal. Pump drive has a problem. Repair pump drive.
  • Page 21 1900 SRM 97 Troubleshooting PROBLEM POSSIBLE CAUSE PROCEDURE OR ACTION Hydraulic pump wears Dirt in the hydraulic system. Drain hydraulic tank and clean thor- faster than normal. oughly. Wrong hydraulic oil. Drain incorrect oil and fill hydraulic tank to correct level with correct oil. Relief valve is set wrong or is dam- Adjust relief valve setting.
  • Page 22 NOTES ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ____________________________________________________________...
  • Page 24 TECHNICAL PUBLICATIONS 1900 SRM 97 10/03 (7/03)(10/02)(11/01)(4/97)(9/93)(3/88)(11/82)(9/81)(2/79) Printed in U.S.A.

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R30xms2

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