The document provides instructions for disassembling and assembling a piston pump (hydraulic fan) used in Caterpillar 336D L and 336D LN excavators. It lists 22 steps for disassembly, removing various components like housing, springs, seals and bearings. The assembly section lists 30 steps to install these components in reverse order, noting that cleanliness is important and worn parts should be replaced. It also provides illustrations matching each step for clarity.
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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.
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2. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 336D L EXCAVATOR KDJ
Configuration: 336D L & 336D LN Excavator KDJ00001-UP (MACHINE) POWERED BY C9 Engine
Disassembly and Assembly
330D, 336D, 336D2, 340D and 340D2 Excavators and 336D MHPU Mobile Hydraulic
Power Unit Machine Systems
Media Number -RENR8648-30 Publication Date -01/03/2015 Date Updated -15/08/2018
i02732014
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-0510 Driver Gp 1
B 1P-1857 Retaining Ring Pliers 1
C 9S-9152 Bearing Puller Gp 1
Start By:
a. Remove the piston pump. Refer to Disassembly and Assembly, "Piston Pump (Hydraulic
Fan) - Remove".
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4. Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
4. Remove housing (21), O-ring seal (20), shim (19), spring (18), spring (17), poppet (16), and
spool (15) from housing (2).
5. Cartridge (14), O-ring seal (13), backup ring (11), O-ring seal (12), spool (10), retainer (9),
spring (8), and retainer (7).
6. Remove screw (6) from housing (2).
Illustration 5 g01212900
Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
7. Remove bolts (22) and head (23).
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5. Illustration 6 g01212901
8. Remove O-ring seals (24), port plate (25), and bearing cup (26).
Illustration 7 g01212902
9. Remove spring (27), piston (29), and O-ring seal (28).
Illustration 8 g01212903
10. Remove piston (30).
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6. Illustration 9 g01212904
11. Remove bearing cone (31).
Illustration 10 g01212905
12. Remove shim (33) and rotating group (32).
Illustration 11 g01212906
13. Remove pistons (34), retainer (35), and bearing (36).
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7. Illustration 12 g01212907
14. Remove pins (37) from barrel (38).
Illustration 13 g01212908
Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
15. Use Tooling (A), Tooling (B), and a suitable press in order to remove retaining ring (39)
from barrel (38).
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8. Illustration 14 g01373818
16. Remove shim (42), spring (41), and shim (40) from barrel (38).
Illustration 15 g01212910
17. Remove swashplate (43).
Illustration 16 g01212911
18. Remove shaft (45), bearing cone (46), and bearings (44).
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9. Illustration 17 g01212912
19. Use Tooling (C) in order to remove bearing cone (46) from shaft (45).
Illustration 18 g01212913
20. Use Tooling (B) in order to remove retaining ring (47).
21. Remove lip seal (48).
Illustration 19 g01212915
22. Remove bearing cup (49).
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10. Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Mon May 11 20:21:45 UTC+0800 2020
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11. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 336D L EXCAVATOR KDJ
Configuration: 336D L & 336D LN Excavator KDJ00001-UP (MACHINE) POWERED BY C9 Engine
Disassembly and Assembly
330D, 336D, 336D2, 340D and 340D2 Excavators and 336D MHPU Mobile Hydraulic
Power Unit Machine Systems
Media Number -RENR8648-30 Publication Date -01/03/2015 Date Updated -15/08/2018
i02732015
Piston Pump (Hydraulic Fan) - Assemble
SMCS - 1387-016-QP; 5070-016-HFN
Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
B 1P-1857 Retaining Ring Pliers 1
D 8T-5096 Dial Indicator Gp 1
Illustration 1 g01212915
1. Lower the temperature of bearing cup (49). Install bearing cup (49).
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12. Illustration 2 g01212913
2. Install lip seal (48).
3. Use Tooling (B) in order to install retaining ring (47).
Illustration 3 g01213404
4. Raise the temperature of bearing cone (46).
5. Install bearing cone (46) onto shaft (45).
Illustration 4 g01213405
6. Install bearing cone (46), shaft (45), and bearing cone (31).
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13. Illustration 5 g01213407
7. Lower the temperature of bearing cone (26). Install bearing cone (26).
Illustration 6 g01212900
8. Position head (23) onto the housing.
9. Install bolts (22).
Illustration 7 g01213409
10. Use Tooling (D) in order to determine the end play of shaft (45).
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15. Illustration 11 g01212910
14. Install swashplate (43).
Illustration 12 g01373818
15. Install shim (40), spring (41), and shim (42) to barrel (38).
Illustration 13 g01212908
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16. 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.
16. Use Tooling (A), Tooling (B), and a suitable press in order to install retaining ring (39) into
barrel (38).
Illustration 14 g01212907
17. Install pins (37) into barrel (38).
Illustration 15 g01212906
18. Install bearing (36), retainer (35), and pistons (34).
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17. Illustration 16 g01212905
19. Install rotating group (32) and shim (33).
Note: Shim thickness was determined on Step 9.
Illustration 17 g01212904
20. Install bearing cone (31).
Illustration 18 g01212903
21. Install piston (30).
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18. Illustration 19 g01212902
22. Install spring (27), piston (29), and O-ring seal (28).
Illustration 20 g01213436
23. Install O-ring seals (24) and port plate (25).
Illustration 21 g01212900
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19. 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.
24. Install head (23) and bolts (22).
Illustration 22 g01212898
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.
25. Install spool (15), poppet (16), spring (17), spring (18), shim (19), O-ring seal (20), and
housing (21) into housing (2).
26. Install retainer (7), spring (8), retainer (9), spool (10), O-ring seal (12), backup ring (11), O-
ring seal (13), and cartridge (14).
27. Install screw (6) into housing (2).
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20. Illustration 23 g01212897
28. Install coil (4) and nut (5).
Illustration 24 g01212896
29. Install O-ring seals (3).
Illustration 25 g01212895
30. Install controller (2) and bolts (1).
End By:
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21. a. Install the piston pump. Refer to Disassembly and Assembly, "Piston Pump (Hydraulic Fan)
- Install".
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Mon May 11 20:22:41 UTC+0800 2020
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22. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 336D L EXCAVATOR KDJ
Configuration: 336D L & 336D LN Excavator KDJ00001-UP (MACHINE) POWERED BY C9 Engine
Disassembly and Assembly
330D, 336D, 336D2, 340D and 340D2 Excavators and 336D MHPU Mobile Hydraulic
Power Unit Machine Systems
Media Number -RENR8648-30 Publication Date -01/03/2015 Date Updated -15/08/2018
i02424411
Piston Pump (Hydraulic Fan) - Install
SMCS - 1387-012-QP; 5070-012-HFN
Installation Procedure
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.
Illustration 1 g01211400
1. Position piston pump (7) and install bolts (6).
2. Connect harness assembly (5).
3. Connect hose assemblies (3) and (4).
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23. Illustration 2 g01211399
4. Connect hose assembly (2).
Illustration 3 g01206719
5. Close door (1).
6. Fill the hydraulic system with oil. Refer to Operation and Maintenance Manual, "Refill
Capacities".
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Mon May 11 20:23:36 UTC+0800 2020
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24. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 336D L EXCAVATOR KDJ
Configuration: 336D L & 336D LN Excavator KDJ00001-UP (MACHINE) POWERED BY C9 Engine
Disassembly and Assembly
330D, 336D, 336D2, 340D and 340D2 Excavators and 336D MHPU Mobile Hydraulic
Power Unit Machine Systems
Media Number -RENR8648-30 Publication Date -01/03/2015 Date Updated -15/08/2018
i02415451
Piston Motor (Hydraulic Fan) - Remove
SMCS - 1386-011-QP; 5058-011-FM
Removal Procedure
Start By:
a. Remove the fan. Refer to Disassembly and Assembly, "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.
Illustration 1 g01207415
1. Bend locking tabs (1) backward.
2. Remove bolts (2) and hub (3).
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25. Illustration 2 g01207416
3. Use a suitable lifting device to position fan motor assembly (4) onto suitable cribbing. The
weight of fan motor assembly (4) is approximately 68 kg (150 lb).
Illustration 3 g01207418
4. Attach a suitable lifting device to piston motor (5). The weight of piston motor (5) is
approximately 23 kg (50 lb).
5. Remove bolts (6) and fan motor (5).
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Mon May 11 20:24:32 UTC+0800 2020
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26. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 336D L EXCAVATOR KDJ
Configuration: 336D L & 336D LN Excavator KDJ00001-UP (MACHINE) POWERED BY C9 Engine
Disassembly and Assembly
330D, 336D, 336D2, 340D and 340D2 Excavators and 336D MHPU Mobile Hydraulic
Power Unit Machine Systems
Media Number -RENR8648-30 Publication Date -01/03/2015 Date Updated -15/08/2018
i02415272
Piston Motor (Hydraulic Fan) - Disassemble
SMCS - 1386-015-QP; 5058-015-FM; 5058-015-HFN
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 9S-9152 Bearing Puller Gp 1
B 1P-1861 Retaining Ring Pliers 1
C 1P-0510 Driver Gp 1
Start By:
a. Remove the piston motor. Refer to Disassembly and Assembly, "Piston Motor (Hydraulic
Fan) - Remove".
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27. Illustration 1 g01207275
Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
1. Remove bolts (1) and head (2).
Illustration 2 g01207276
2. Remove O-ring seal (3), port plate (4), and bearing cup (5).
Illustration 3 g01207278
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28. Suggest:
If the above button click is invalid.
Please download this document
first, and then click the above link
to download the complete manual.
Thank you so much for reading
29. Personal injury can result from being struck by parts propelled by a
released spring force.
Make sure to wear all necessary protective equipment.
Follow the recommended procedure and use all recommended tooling to
release the spring force.
3. Remove plug (6), sleeve (7), poppet (8), spring (9), poppet (10), and O-ring seal (11).
Illustration 4 g01207279
4. Remove bearing cone (12).
Illustration 5 g01207280
5. Remove shim (13) and rotating group (14).
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