Usage:
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Stop the engine, lower the bucket to the ground, move the control levers backward and forward to release the pressure in the hydraulic system. Slowly loosen the cap to release any pressure in the hydraulic tank. Let the hydraulic oil become cool before any lines are disconnected in the hydraulic system. |
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- 920-17.5 U.S. gal. (66 litre)
- 930-19.5 U.S. gal. (74 litre)
1. Drain the oil from the hydraulic tank. The capacity of the system is:
2. Remove access cover (1) and fender (2) as a unit from the machine. Remove access cover (3).
3. Remove access cover (4) from the machine.
4. Remove elbow (5) and tube assembly (6) as a unit.
5. Disconnect hose assemblies (9) and (10). Remove tee (7) and tube assembly (8) from the hydraulic pump.
NOTE: Tee (8) can not be removed until the bolts that hold the pump in position are loosened.
6. Remove the two bolts (11) and remove pump (12). The weight of the pump is 50 lb. (23 kg).
Install Hydraulic Pump
NOTE: Put clean hydraulic oil on all O-ring seals.
1. Put the O-ring seal on pump (1) and install the pump on the machine.
NOTE: Do not tighten bolts (2) until tube assembly (3) is installed.
2. Install bolts (2) to hold the hydraulic pump in position.
3. Put the O-ring seal and tube assembly (3) in position. Install the back flange and two bolts that hold hose assembly (5).
4. Tighten bolts (2).
5. Put the O-ring seal in hose assembly (5) and connect hose assembly (5) to the pump.
6. Put the O-ring seals in position and install tee (4). Connect hose assembly (6) to the tee.
7. Install tube assembly (7) and elbow (8) as a unit.
8. Install access cover (9) on the machine.
9. Install access cover (11) and fender (10) on the machine as a unit.
10. Install the access cover on the bottom of the hydraulic tank.
11. Fill the hydraulic system with oil to the correct level.
Disassemble Hydraulic Pump
start by:
a) remove hydraulic pump
NOTE: Put marks across the adapter, body and covers for correct alignment when the pump is assembled.
1. Remove bolts (1), adapter (2) and the O-ring seal from the pump body.
2. Remove bolts (3) and cover (4) from the pump cover. Remove the two O-ring seals and the back-up ring from the cartridge assembly.
3. Remove the two seal rings (5) from cover (4).
4. Remove bolts (6) and body (7) from cover (8). Remove the two O-ring seals and back-up ring from the cartridge assembly.
5. Remove the two seal rings (9) from body (7).
6. Use tool (A) to remove ring (10) from the shaft.
7. Remove shaft (11) from adapter end of body (7).
8. Remove the ring that holds bearing (12) in body (7). Remove bearing (12) and washer (13).
9. Remove seal (14) from the inside of body (7).
10. Remove seal (15) from the adapter end of body (7).
11. Remove cartridge assemblies (16) and (17) from pump cover (8).
12. Disassemble both cartridge assemblies as follows:
a) Remove screws (21) and make a separation of plate (18), ring 19), plate (20) and plates (22).
b) Remove rotor (23) from ring (19).
c) Remove vanes (24) and inserts (25) from rotor (23).
d) Remove the seal and retainer assemblies (26) from plates (18) and (20).
e) Remove seals (28) from retainers (27).
13. Check all of the parts of the pump for damage (scratches, nicks and burrs). If the parts have damage, use new parts for replacement. See DIAGNOSING HYDRAULIC PUMP FAILURES FORM NO. SEBD0501.
Assemble Hydraulic Pump
| NOTICE |
|---|
All parts must be kept clean and free of damage (scratches, nicks and burrs). Use clean solvent to clean all metal parts of the pump. Put clean hydraulic oil on all parts of the pump at assembly. |
1. Install O-ring seals (1) in each retainer (2).
2. Install the seal and retainer assemblies (4) in end plates (3) and (5) with the O-ring seal toward the end plates as shown.
3. Install inserts (8) in vanes (7). Install the vane assemblies in rotor (6) with the sharp edge of the vanes toward the direction of the arrow (direction of rotation) as shown.
4. Install rotor (6) and the vane assemblies in ring (10). Make sure the arrow on rotor (6) is in the same direction as the arrow on the chamfer of ring (10).
5. Install plates (9) and (11) on each side of ring (10). Make sure the bronze side of the plates are next to rotor (6).
6. Put end plates (3) and (5) with the seal and retainer assemblies in position on the plates.
7. Make sure the notches on outside diameters of plates (3), (9), (11) and (5) are in alignment. Make an alignment of these notches with the chamfers on ring (10) and install the two screws that hold the cartridge assembly together.
NOTE: Make sure the end of ring (10) that has the arrow on its chamfer is assembled toward end plate (3) before the screws are tightened.
8. Do Steps 1 through 7 for the other cartridge assembly.
9. Install cartridge assemblies (13) and (14) in pump cover (12) until the dowels of the cartridge assemblies are in their bores in the cover.
10. Put O-ring seals (15) on both cartridge assemblies and install back-up rings (16). Make sure the O-ring seals are toward cover (12).
11. Install the lip type seal in the outside counterbore of pump body (17) with tool group (A). Make sure the lip of the seal is toward the inside as shown.
12. Use tool group (A) to install the lip type seal in the inside of pump body (17). Make sure the lip of the seal is toward the inside as shown.
13. Install washer (19) and bearing (18) in pump body (17). Install the ring that holds bearing (19) in position.
14. Install the shaft in pump body (17). Use tool (B) to install ring (21) in the groove of the shaft.
15. Install the two seal rings (20) in pump body (17).
16. Put the O-ring seal in position on the cartridge assembly. Install pump body (17) and the shaft on cover (12). Tighten the bolts that hold body (17) to a torque of 70 ± 5 lb.ft. (95 ± 7 N·m).
17. Install the two seal rings (22) in cover (23).
18. Install O-ring seal (24) on the cartridge assembly. Put cover (23) in position and tighten the bolts that hold it to a torque of 45 ± 5 lb.ft. (60 ± 7 N·m).
19. Install O-ring seal (26), adapter (25) and the bolts to the pump body.
end by:
a) install hydraulic pump