1. The document provides disassembly and assembly instructions for the piston pump (hydraulic fan) on a 992K Wheel Loader model.
2. It describes 33 steps to disassemble the pump and its components such as the head assembly, piston assemblies, valves.
3. It then describes 13 steps for assembling the pump, including installing seals, springs, and adjusting the bearing preload using feeler gauges to measure clearance. Proper cleaning and lubrication of parts is emphasized.
𝘼𝙣𝙩𝙞𝙦𝙪𝙚 𝙋𝙡𝙖𝙨𝙩𝙞𝙘 𝙏𝙧𝙖𝙙𝙚𝙧𝙨 𝙞𝙨 𝙫𝙚𝙧𝙮 𝙛𝙖𝙢𝙤𝙪𝙨 𝙛𝙤𝙧 𝙢𝙖𝙣𝙪𝙛𝙖𝙘𝙩𝙪𝙧𝙞𝙣𝙜 𝙩𝙝𝙚𝙞𝙧 𝙥𝙧𝙤𝙙𝙪𝙘𝙩𝙨. 𝙒𝙚 𝙝𝙖𝙫𝙚 𝙖𝙡𝙡 𝙩𝙝𝙚 𝙥𝙡𝙖𝙨𝙩𝙞𝙘 𝙜𝙧𝙖𝙣𝙪𝙡𝙚𝙨 𝙪𝙨𝙚𝙙 𝙞𝙣 𝙖𝙪𝙩𝙤𝙢𝙤𝙩𝙞𝙫𝙚 𝙖𝙣𝙙 𝙖𝙪𝙩𝙤 𝙥𝙖𝙧𝙩𝙨 𝙖𝙣𝙙 𝙖𝙡𝙡 𝙩𝙝𝙚 𝙛𝙖𝙢𝙤𝙪𝙨 𝙘𝙤𝙢𝙥𝙖𝙣𝙞𝙚𝙨 𝙗𝙪𝙮 𝙩𝙝𝙚 𝙜𝙧𝙖𝙣𝙪𝙡𝙚𝙨 𝙛𝙧𝙤𝙢 𝙪𝙨.
Over the 10 years, we have gained a strong foothold in the market due to our range's high quality, competitive prices, and time-lined delivery schedules.
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Upgrading the brakes of your car? Keep these things in mind before doing so. Additionally, start using an OBD 2 GPS tracker so that you never miss a vehicle maintenance appointment. On top of this, a car GPS tracker will also let you master good driving habits that will let you increase the operational life of your car’s brakes.
2. Shutdown SIS
Previous Screen
Product: WHEEL LOADER
Model: 992K WHEEL LOADER RM5
Configuration: 992K Wheel Loader RM500001-UP (MACHINE) POWERED BY C32 Engine
Disassembly and Assembly
854K Wheel Dozer and 992K Wheel Loader Machine Systems
Media Number -KENR5573-03 Publication Date -01/01/2014 Date Updated -05/07/2017
i02875102
Piston Pump (Hydraulic Fan) - Disassemble
SMCS - 1387-015-QP; 5070-015-HFN
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-1856 Pliers 1
B 9S-9151 Bearing Puller 1
C Bar stock(1)
1
D 1P-1861 Retaining Ring Pliers 1
(1)
Make a piece that is 9.50 mm (0.375 inch) thick 19.00 mm (0.750 inch) wide and 50.8 mm (2.00 inch) long.
Start By:
a. Remove the steering pump. Refer to Disassembly and Assembly, "Piston Pump (Hydraulic
Fan) - Remove".
Note: Cleanliness is an important factor. Before the disassembly procedure, the exterior of the
component should be thoroughly cleaned. This will help to prevent dirt from entering the internal
mechanism.
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
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3. 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.
Illustration 1 g01431185
1. Place steering pump assembly (1) on a suitable bench, as shown.
2. Remove bolts (2) and actuator assemblies (3) from steering pump (1).
Illustration 2 g01431186
Sudden release of spring force can cause injury.
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5. To prevent the possibility of injury, follow the procedure to relieve the
spring pressure.
Note: There is slight spring pressure between the head assembly and the pump housing.
3. Remove bolts (4) that secure head assembly (5) to steering pump housing (6).
Illustration 3 g01122198
Illustration 4 g01122184
4. Remove O-ring seal (7) and O-ring seals (8) from head assembly (5).
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6. Illustration 5 g00714290
5. Remove piston guides (9) and (10) from head assembly (5), if necessary.
Illustration 6 g00714292
6. Remove bearing cup (11) from head assembly (5).
Illustration 7 g00714297
7. Remove spring (12), piston (13), and port plate (14) from pump housing (6).
Illustration 8 g00714300
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7. 8. Remove piston assembly (15) from the pump housing.
Illustration 9 g00714301
9. Remove spacer (16) from piston assembly (15).
Illustration 10 g00714343
10. Remove bearing cone (17) from pump shaft (18).
Illustration 11 g00714344
11. Remove adjustment shim (19) from pump shaft (18).
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8. Illustration 12 g00714345
12. Remove rotating group (20) from pump housing (6).
Illustration 13 g00714346
13. Place rotating group (20) on suitable blocks, as shown.
14. Remove pump shaft (18) from rotating group (20).
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9. Illustration 14 g00714347
15. Use a suitable press and Tooling (B) in order to remove bearing cone (21) from pump shaft
(18).
Illustration 15 g00714348
16. Remove swashplate (22) from barrel assembly (23).
Illustration 16 g00714349
17. Remove piston assembly (24) from barrel assembly (23).
Illustration 17 g00714389
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11. Illustration 21 g00714395
Sudden release of spring force can cause injury.
To prevent the possibility of injury, follow the procedure to relieve the
spring pressure.
20. Install Tooling (C), as shown.
Note: There is spring force against retaining ring (27). When retaining ring (27) is removed,
the spring force will be released. Removal of the internal components in barrel assembly
(23) should be performed in a press. This is done in order to retain spring (28) and retaining
ring (27).
21. Use a suitable press and Tooling (C) in order to compress spring (28) in barrel assembly
(23).
22. Use Tooling (A) in order to remove retaining ring (27) from the barrel assembly.
23. Remove spring (28), guide (29), and pins (30) from the barrel assembly.
Illustration 22 g00714396
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12. 24. If necessary, remove stops (31) from swashplate (22).
Illustration 23 g00714397
25. Remove bearing races (32) from pump housing (6).
Illustration 24 g00714408
26. Use Tooling (D) in order to remove retaining ring (33) from pump housing (6).
Illustration 25 g00714407
27. Remove lip seal (34) from pump housing (6).
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13. Illustration 26 g00714409
28. Remove bearing cup (35) from pump housing (6).
Illustration 27 g00714411
Illustration 28 g00714426
29. Remove ring (36) from pump housing (6).
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14. Illustration 29 g00714428
30. Remove O-ring seals (37) from valve assembly (38).
Illustration 30 g00714429
Sudden release of spring force can cause injury.
To prevent the possibility of injury, follow the procedure to relieve the
spring pressure.
31. Remove O-ring seals (41) and locking nut (40) from valve assembly (39).
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15. Illustration 31 g00714430
32. Remove O-ring seal (48) from stem assembly (49).
33. Remove spring (47), spring (46), and plunger (45) from valve assembly (39).
34. Remove plug (42), O-ring seal (43), and spool (44) from valve assembly (39).
35. Repeat Steps 32 through 34 for the remaining valve assembly (38).
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Tue Mar 31 17:51:42 UTC+0800 2020
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16. Shutdown SIS
Previous Screen
Product: WHEEL LOADER
Model: 992K WHEEL LOADER RM5
Configuration: 992K Wheel Loader RM500001-UP (MACHINE) POWERED BY C32 Engine
Disassembly and Assembly
854K Wheel Dozer and 992K Wheel Loader Machine Systems
Media Number -KENR5573-03 Publication Date -01/01/2014 Date Updated -05/07/2017
i02875105
Piston Pump (Hydraulic Fan) - Assemble
SMCS - 1387-016-QP; 5070-016-HFN
Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-1856 Pliers 1
C Bar stock(1)
1
D 1P-1861 Retaining Ring Pliers 1
E 1S-0256 Pliers 1
F 1U-7978 Screwdriver 1
G 8H-8581 Feeler Gauge 1
H 8T-5096 Indicator 1
(1)
Make a piece that is 9.50 mm (0.375 inch) thick, 19.00 mm (0.750 inch) wide and 50.8 mm (2.0 inch) long.
Note: Cleanliness is an important factor. Before assembly, all parts should be thoroughly cleaned
in cleaning fluid. Allow the parts to air dry. Wiping cloths or rags should not be used to dry parts.
Lint may be deposited on the parts which may cause later trouble. Inspect all parts. If any parts are
worn or damaged, use new parts for replacement.
Note: Apply a light film of hydraulic oil to all internal components prior to assembly. Check the
condition of all O-ring seals. If any O-ring seals are worn or damaged, use new parts for
replacement.
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17. Illustration 1 g00714430
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.
1. Install O-ring seal (43) to plug (42). Install spool (44) and plug (42) in valve assembly (39).
Tighten plug (42) to a torque of 31 ± 2 N·m (23 ± 1 lb ft).
2. Install O-ring seal (48) to stem assembly (49). Install plunger (45), spring (46), and spring
(47) into valve assembly (39). Tighten plug (40) to a torque of 100 ± 5 N·m (75 ± 3 lb ft).
3. Repeat Steps 1 and 2 for the remaining valve assembly.
Illustration 2 g00714429
4. Install O-ring seals (41) to valve assembly (39).
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18. Illustration 3 g00714428
5. Install O-ring seals (37) to valve assembly (38).
Illustration 4 g00714426
Illustration 5 g00714411
6. Install ring (36) in pump housing (6).
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19. Illustration 6 g00714409
7. Lower the temperature of bearing cup (35). Use the proper equipment in order to install the
bearing cup in pump housing (6).
Illustration 7 g00714408
Illustration 8 g00714407
8. Install lip seal (34) in pump housing (6).
9. Use Tooling (D) in order to install retaining ring (33) in pump housing (6).
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20. Illustration 9 g00714397
10. Install bearing races (32) into pump housing (6).
Illustration 10 g00714547
11. Raise the temperature of bearing cone (21) to a temperature of 121 °C (250 °F). Install
bearing cone (21) onto pump shaft (18).
Illustration 11 g01433232
12. Install pump shaft (18) in pump housing (6).
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21. 13. Use the following steps in order to determine the proper preload on bearings of the pump
assembly.
Illustration 12 g00714557
a. Install adjustment shim (19) and bearing cone (17) on shaft assembly (18).
Illustration 13 g00714292
b. Lower the temperature of bearing cup (11). Install the bearing cup in head assembly
(5).
Illustration 14 g01121754
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22. c. Position head assembly (5) on pump housing (6).
d. Use Tooling (G) in order to measure the distance between the head assembly and the
pump housing.
e. Take measurements at three equal intervals on the surface between the head assembly
and the pump housing.
f. The average of the three dimensions should be between zero and 0.05 mm (0.002
inch).
g. If necessary, grind adjustment shim (17) in order to obtain the correct dimension
between the head assembly and the pump housing. It may be necessary to replace the
shim with a new part.
Illustration 15 g01121544
14. Install bolts (4) and head assembly (5) to pump housing (6). Tighten the bolts to a torque of
240 ± 40 N·m (175 ± 30 lb ft).
Illustration 16 g01122214
15. Use the following steps in order to check the end play in pump shaft (18).
a. Use Tooling (H), Tooling (E), and Tooling (F) in order to check for end play in pump
shaft (18). If end play exists in the shaft assembly, repeat Step 13 until the correct
dimension between the head assembly and the pump housing is reached.
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23. b. Remove bolts (4) and head assembly (5) from the pump housing. Remove bearing
cone (17), and adjustment shim (19) from the pump shaft (18). Remove the pump
shaft from pump housing (6).
c. Proceed with the assembly of the pump assembly.
Illustration 17 g00714396
16. Install stops (31) into swashplate (22).
Illustration 18 g00714395
Illustration 19 g00714630
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25. Illustration 20 g01121546
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.
Note: There is spring force against retaining ring (27). When retaining ring (27) is not
seated properly, the spring force will be released. Installation of the internal components in
barrel assembly (23) should be performed in a press. This is done in order to retain spring
(28) and retaining ring (27).
17. Install pins (30), guide (29) and spring (28) in barrel assembly (23).
18. Use a suitable press and Tooling (C) in order to compress the spring (28) in barrel assembly
(23).
19. Use Tooling (B) in order to install retaining ring (27).
20. Slowly release compression on spring (28). Make sure that the retaining ring (27) is seated
properly.
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