Caterpillar Cat 990K Wheel Loader (Prefix A9P) Service Repair Manual (A9P00001 and up).pdf

Shutdown SIS
Previous Screen
Product: WHEEL LOADER
Model: 990K WHEEL LOADER A9P
Configuration: 990K Wheel Loader A9P00001-UP (MACHINE) POWERED BY C27 Engine
Disassembly and Assembly
990K Wheel Loader and 844K Wheel Dozer Machine Systems
Media Number -UENR6576-05 Publication Date -01/01/2018 Date Updated -26/01/2018
i07518348
Piston Pump (Steering) - Assemble
SMCS - 4306-016-QP; 5070-016-ZH
Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 439-3939 Link Bracket 2
B 163-5006 Spring Clip 2
C 171-1113 Measuring Hub 1
D 129-3876 Measuring Bell 1
E - Height Gauge 1
F 171-1112 Test Pins 3
G 171-1114 Alignment Plug 1
H 6V-2055 Grease 1
J - Loctite 263 -
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990K Wheel Loader A9P00001-UP (MACHINE) POWERED BY C27 Engine(SEBP6...
2021/11/23
https://127.0.0.1/sisweb/sisweb/techdoc/techdoc_print_page.jsp?returnurl=/sis...

Illustration 1 g06152922
1. Install retaining ring (61) and bearing (62) onto shaft assembly (60).
2. Use a soft faced hammer to install shaft (60) into housing (30).
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Note the orientation of lip seals (59).
3. Install lip seals (59) and the O-ring seals and into cover (58).
4. Install cover (58) and bolts (57).
5. Install outer races (56) into housing (30).
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6. Install pins (54) onto swashplate (53).
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7. Install bearings (55) to swashplate (53). Use Tooling (B) to hold the bearings in place for
installation.
8. Install swashplate (53) and remove Tooling (B).
9. Install retainers (51), plugs (52) and the O-rings. Repeat for opposite side.
Note: Ensure retainers (51) lock into pins (54) shown in illustration 7..
10. Install adjustment screw (50) into housing (30). Repeat for opposite side.
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11. Place port plate (31) on a flat surface and install Tooling (G).
12. Install Tooling (F) into bearing (49).
13. Install shims (47) into bearing (49).
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14. Install bearing (49) onto barrel (44).
Dimension (X) is 220.95 - 221.20mm (8.698 - 8.708 inch)
Dimension (Y) is 170.95 - 171.20mm (6.730- 6.740 inch)
15. Install barrel assembly (44) onto port plate (31). Install retainer plate (46) onto barrel
assembly (44). Install Tooling (C) and (D) onto retainer plate (46).
16. Use Tooling (G) to measure dimensions (X) and (Y). Adjust the shims under retainer plate
(46) as necessary to achieve the dimensions shown in Illustration 16.
17. Remove Tooling (C) and (D). Remove retainer plate (46) from barrel assembly (44).
Remove barrel assembly (44) from port plate (31).
18. Remove bearing (49) from barrel (44).
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19. Remove shims (47) from bearing (49).
20. Remove Tooling (F) from bearing (49).
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21. Apply Tooling (H) to springs (48). Install springs (48) and shims (47) into bearing (49).
22. Install bearing (49) onto barrel (44).
23. Install retainer plate (46) and pistons (45) into barrel (44).
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24. Rotate housing (30) to a horizontal position. Use a suitable string to install barrel assembly
(44) into housing (30).
25. Apply Tooling (J) to bolts (42). Install retainer (43) and bolts (42). Repeat for opposite side.
Note: Bolts (42) should be replaced with new bolts.
26. Install cover (41). Repeat for opposite side.
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990K Wheel Loader A9P00001-UP (MACHINE) POWERED BY C27 Engine(SEB...
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27. Install O-ring seal (39). Install rods (40) and (38). Install piston (37), spring (36), spring
(35), and piston (34).
28. Install bushing (33) and bearing (32) into head (29). Apply Tooling (H) to port plate (31)
and install into head (29).
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Improper assembly of parts that are spring loaded can cause bodily
injury.
To prevent possible injury, follow the established assembly procedure
and wear protective equipment.
29. Attach Tooling (B) and a suitable lifting device to head (29). Install head (29) onto housing
(30).
30. Install bolts (28). Tighten bolts (28) to a torque of 780 ± 78 N·m (575 ± 58 lb ft). Install
plug (27) and the O-ring seal. Tighten plug (27) to a torque of 198 ± 20 N·m
(146 ± 15 lb ft).
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31. Install plugs (26), (25), and the O-ring seals.
32. Install retaining ring (24A).
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33. Install impeller (23) and retaining ring (24).
34. Install adapter (22) and the O-ring seal. Install bolts (21).
35. Install adapter (20) and the O-ring seal. Install bolts (19). Install coupler (18).
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Improper assembly of parts that are spring loaded can cause bodily
injury.
To prevent possible injury, follow the established assembly procedure
and wear protective equipment.
36. Install spool (11), guide (12), spring (13), spring (14), guide (15), O-ring seal (16), and
valve (17).
37. Install spool (5), guide (6), spring (7), guide (8), O-ring seal (9), and valve (10).
38. Install O-ring seals (4).
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39. Install valve (2) and bolts (3).
40. Install plug (1) and the O-ring seal. Remove the piston pump from Tooling (A).
End By:
a. Install the piston pump.
Copyright 1993 - 2021 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Tue Nov 23 17:33:33 UTC+0800 2021
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Shutdown SIS
Previous Screen
i06545830
Gear Pump (Secondary Steering) - Remove and Install
SMCS - 4324-010-GT; 4324-010; 5073-010-SST; 5073-010
Removal Procedure
Start by:
a. Connect the steering frame lock.
b. Release the hydraulic system pressure.
NOTICE
Care must be taken to ensure that fluids are contained during
performance of inspection, maintenance, testing, adjusting, and repair
of the product. Be prepared to collect the fluid with suitable containers
before opening any compartment or disassembling any component
containing fluids.
Refer to Special Publication, NENG2500, "Dealer Service Tool
Catalog" for tools and supplies suitable to collect and contain fluids on
Cat®
products.
Dispose of all fluids according to local regulations and mandates.
Hot oil and hot components can cause personal injury. Do not allow hot
oil or hot components to contact skin.
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Note: Check the O-ring seals, the gaskets, and the seals for wear or for damage. Replace the
components, if necessary.
Note: Cleanliness is an important factor. Before assembly, thoroughly clean all parts in cleaning
fluid. Allow the parts to air dry. Do not use wiping cloths or rags to dry parts. Lint may be
deposited on the parts which may cause trouble. Inspect all parts. If any parts are worn or
damaged, use new parts for replacement. Dirt and other contaminants can damage the precision
component. Perform assembly procedures on a clean work surface. Keep components covered and
protected always.
1. Drain the transmission oil into a suitable container for storage or disposal. Refer to
Operation and Maintenance Manual, "Transmission Oil - Change". Drain enough oil to
bring the oil level below the secondary steering pump.
2. Disconnect hose assemblies (2) from secondary steering pump (3).
3. Remove nuts (4) and secondary steering pump (3).
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4. Remove gasket (5) from the pump drive.
Installation Procedure
1. Install secondary steering pump (3) in the reverse order of removal.
Tue Nov 23 17:34:30 UTC+0800 2021
3/3
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Shutdown SIS
Previous Screen
i00761547
Gear Pump (Secondary Steering) - Disassemble
SMCS - 4324-015-GT; 5073-015-SST
Disassembly Procedure
Start By:
a. Remove the secondary steering pump. Refer to Disassembly and Assembly, "Gear Pump
(Secondary Steering) - Remove".
1. Remove bolts (1) and the washers. Remove body (2) from the secondary steering pump.
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2. Remove two pistons (3) and two springs from body (2).
3. Remove two seals (4) from body (2).
4. Remove spacer (5) from body assembly (6).
5. Remove two spacers (7) from spacer (5).
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6. Remove two pistons (8) and two springs (9) from body assembly (6).
7. Remove two seals (10) from body assembly (6).
8. Remove bolts (11) and the washers from flange assembly (12). Remove flange assembly
(12) from body assembly (6).
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9. Remove seal (13) from flange assembly (12).
10. Remove seals (14) from bushings (15).
11. Remove two dowels (16) and two bushings (15) from flange assembly (12).
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12. Remove two lip seals (17) and the ring from flange assembly (12).
13. Remove two metal seals (18) and five plastic seals (19) from body assembly (6).
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14. Remove plate (20) from body assembly (6).
15. Remove shaft (21) and gear (22) from body assembly (6).
16. Remove plate (23) from body assembly (6).
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17. Remove two metal seals (24) and five plastic seals (25) from body assembly (6).
18. Remove seals (26) from bushings (27). Remove bushings (27).
Tue Nov 23 17:35:27 UTC+0800 2021
7/7
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Shutdown SIS
Previous Screen
i01281269
Gear Pump (Secondary Steering) - Assemble
SMCS - 4324-016-GT; 5073-016-SST
Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-0510 Driver Gp 1
Note: Thoroughly clean all parts of the secondary steering pump prior to assembly.
1. Check the condition of all seals. If any seals are worn or damaged, use new parts for
replacement . Lubricate the seals with clean hydraulic oil.
2. Apply clean hydraulic oil on all internal parts of the secondary steering pump.
NOTICE
Failure to follow the recommended procedure or the specified tooling
that is required for the procedure could result in damage to
components.
To avoid component damage, follow the recommended procedure
using the recommended tools.
Note: Two isolation plates are required for the bottom of the pump housing. Two isolation
plates are required for the top of the pump housing. The isolation plates hold the seal
components together. The isolation plates that have round edges on one outer radius will be
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Caterpillar Cat 990K Wheel Loader (Prefix A9P) Service Repair Manual (A9P00001 and up).pdf

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Caterpillar Cat 990K Wheel Loader (Prefix A9P) Service Repair Manual (A9P00001 and up).pdf