Caterpillar cat 966 f series ii wheel loader (prefix 7hl) service repair manual (7hl00001 and up)

Service Repair Manual
Models
966F SERIES II WHEEL
LOADER

Shutdown SIS
Previous Screen
Product: WHEEL LOADER
Model: 966F WHEEL LOADER 7HL
Configuration: 966 F SERIES II WHEEL LOADER (LOGGING ARRANGEMENT) 7HL00001-UP (MACHINE)
Disassembly and Assembly
966F WHEEL LOADER VEHICLE SYSTEMS
Media Number -SENR4779-01 Publication Date -01/03/2004 Date Updated -24/10/2005
SENR47790018
Pilot And Hydraulic Pump
SMCS - 5073-010; 5073-015; 5073-016
Remove & Install Pilot And Hydraulic Pump
Release the pressure from the hydraulic system before any lines are
removed or disconnected.
NOTE: Identify all hydraulic lines as they are removed to aid in the proper installation. Cap and
plug all lines and fittings as they are removed to prevent excess fluid loss and contamination.
1. Remove four bolts and washers (1) and line (2).
2. Remove line (3) from the front of the pump.
1/18966 F SERIES II WHEEL LOADER (LOGGING ARRANGEMENT) 7HL00001-UP ...
2020/3/16https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...

3. Remove two lines (4). Remove four bolts and washers (8) and the hydraulic line.
4. Remove four bolts and washers (5) and disconnect wire harness (7).
5. Open the access door behind the cab. Fasten a hoist to the pump and remove the two bolts and
hydraulic pump (6). The weight of the pump is 68 kg (150 lb).
NOTE: To install pilot and hydraulic pump, reverse the removal steps.
Disassemble Pilot And Hydraulic Pump
Start By:
a. remove pilot and hydraulic pump
1. Remove pilot oil pump (1) from the hydraulic pump.

2. Remove cover (2) and spring (3) from the pump.
Spring (5) is under compression behind plug (7).
3. Remove plug (7), sping (5) and spool assembly (4).
4. Remove O-ring seal (6) from the plug.
Spring (8) is under compression behind bolt (12).
5. Remove bolt (12), spring (10), valve (9) and spring (8) from valve spool (11).

6. Remove plate (15) and rotor assembly (16) from the ring.
7. Remove ring (14) and the dowels from adapter (13).
8. Remove the O-ring seals from the adapter and the plate.
9. Remove vanes (17) from the rotor.
10. Scribe a line on the housings for assembly purposes and remove four bolts (18). Make a
separation of cartridge assembly (19) from the pump.
NOTE: Make a note of the direction of the arrows at locations (X) and (Y) and the location of
bolts (20) for assembly purposes.
11. Remove the cartridge and the O-ring seal from the housing.

12. Remove seal ring (21) and cover (22).
NOTE: Put identification on the parts of the cartridge for their correct position at assembly.
13. Remove bolts (20) and the cover from the cartridge.
14. Remove seals (24) from cover (23).
15. Remove plate (25) from the cartridge.

16. Remove ring (26) and rotor assembly (27) from the plate.
17. Remove vanes (29) from the rotor.
18. Remove inserts (28) from the vanes.
19. Remove plate (30) from the end plate.
20. Remove seals (31) from end plate (32).

21. Remove the O-ring seal and backup seal (33) from the plate.
22. Remove body assembly (34) from body (35).
23. Remove cartridge assembly (36) from the shaft.
24. Remove seal ring (37) from the housing.
25. Remove spiral ring (38) and remove the shaft assembly and the washer from the housing. Use
Driver Group (B) to remove the lip type seals from the housing.

26. Remove snap ring (39) with Pliers (A).
27. Remove bearing (41) from shaft (40).
28. Remove washer (42) from the housing.
NOTE: Make a note of the direction of the arrows that are nearest bolts (44) and the direction of
the arrow on the ring for assembly purposes.
29. Remove bolts (44) and plate (43) from the cartridge.
30. Remove seals (45) from plate (43).

31. Remove plate (46) from the cartridge.
32. Remove ring (47) and rotor assembly (48).
33. Remove the plate that is under the rotor.
34. Remove vanes (50) and inserts (49) from the rotor.
35. Remove seals (51) from plate (52).

36. Remove seals (53) from the plate.
Assemble Pilot And Hydraulic Pump
1. Inspect all parts for wear or damage. Make replacements as necessary. Put clean oil on all parts
at assembly.
2. Install O-ring seal (53) and the backup ring on the plate.
3. Install seal assemblies (51) on the plate.
10/18966 F SERIES II WHEEL LOADER (LOGGING ARRANGEMENT) 7HL00001-U...

4. Install plate (46) with the brass side toward the rotor.
NOTICE
Vanes (50) must be installed as described or improper operation will
result.
5. Install inserts (49) and vanes (50) in rotor (48). Install the vanes with the leading edge (sharp
edge) at the outside diameter and in the same direction as the rotation of the rotor.
6. Put ring (47) in position on the plate. The arrow on the chamfer of ring (47) must be in the same
direction as the rotation of the rotor.

8. Install seal assemblies (45) on plate (43).
9. Put plate (43) in position. Install the bolts in the holes that are nearest the arrows that are in the
same direction as the arrows on the ring.
10. Use Driver Group (A) to install the lip type seal in the housing as shown.

11. Turn the housing over and install the other lip type seal with Driver Group (A). Install the seal
with the lip down, as shown.
12. Put washer (42) in the housing.
13. Install bearing (41) on shaft (40).
14. Use Pliers (B) to install snap ring (39).
15. Put the shaft assembly in position in the housing.
16. Install spiral ring (38) to hold the shaft assembly in the housing.

17. Install seal ring (37).
18. Install cartridge (36) in the housing.
19. Install the O-ring seal over the outside diameter of the cartridge, on the housing.
20. Install housing assembly (34) on housing (35). Make an alignment of the dowels in the
cartridge with the holes in housing (35).
21. Install seals (33) on the plate with the backup ring above the O-ring.

23. Put plate (30) in position with the brass side toward the rotor.
24. Put inserts (28) in vanes (29).
NOTICE
Failure to install vanes (29) or ring (26) as described, will result in
improper operation of the pump.
25. Install vanes (29) in the rotor with the leading edge (sharp edge) at the outside diameter of the
rotor and in the same direction as the rotation of the rotor.
26. Install the rotor assembly on the plate.
27. Install ring (26) with the arrow on the chamfer of the ring in the same direction as the rotation
of the rotor.

30. Install the plate and fasten with the bolts nearest the arrow that is in the same direction as the
arrow on the ring. These arrows must point in the direction of the pump rotation.
31. Put seal ring (21) in position in the housing.
32. Put the cartridge and the O-ring in position.

33. Fasten housing (19) with four bolts (18). Tighten the bolts to a torque of 360 ± 14 N·m (265 ±
10 lb ft).
34. Put spring (8), valve (9), shims (10) and bolt (12) in position in valve spool (11).
35. Install O-ring seal (6) on plug (7).
36. Install spool assembly (4), spring (5) and plug (7).
37. Put vanes (17) in the rotor.

38. Put the O-ring seals and the pins on plate (13). Put the rotor assembly in position on the plate.
39. Install ring (14) and adapter (15).
40. Install spring (3) on the pilot pump assembly.
41. Install the pilot pump assembly on the shaft.
42. Install cover assembly (2) and fasten with the four bolts that hold it. Tighten the four bolts to a
torque of 55 ± 7 N·m (40 ± 5 lb ft).
End By:
a. install pilot and hydraulic pump
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
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Shutdown SIS
Previous Screen
Product: WHEEL LOADER
Model: 966F WHEEL LOADER 7HL
Configuration: 966 F SERIES II WHEEL LOADER (LOGGING ARRANGEMENT) 7HL00001-UP (MACHINE)
Disassembly and Assembly
966F WHEEL LOADER VEHICLE SYSTEMS
Media Number -SENR4779-01 Publication Date -01/03/2004 Date Updated -24/10/2005
SENR47790019
Hydraulic Oil Filters
SMCS - 5068-011; 5068-012
Remove Hydraulic Oil Filters
Release the pressure in the hydraulic system before performing any
work.
Typical Example
1. Remove hydraulic tank filler cap (2) slowly to release the pressure in hydraulic tank (1).

Typical Example
2. Loosen bolt (3) and remove cap (4).
Typical Example
3. Remove element (5).
4. Remove spiral lock ring (6). Remove spacer (7) and six springs (8) from the cover.
5. Remove spiral lock ring (10). Remove bolt (3) from the cover. Remove the O-ring seal from the
bolt.

6. Remove O-ring seal (9).
7. Repeat Steps 2 through 6 for the other filter.
Install Hydraulic Oil Filters
1. Install the O-ring seal on the bolt and install the bolt in the cover. Install spiral lock ring (10)
and O-ring seal (9).
2. Install six springs (8), spacer (7) and spiral lock ring (6).
3. Install element (5).
4. Put cover (4) in position and tighten bolt (3).

Caterpillar cat 966 f series ii wheel loader (prefix 7hl) service repair manual (7hl00001 and up)

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Caterpillar cat 966 f series ii wheel loader (prefix 7hl) service repair manual (7hl00001 and up)