This document provides instructions for disassembling and assembling the gear pump (pilot) and main hydraulic pump on a Caterpillar 320D2 excavator. The summary includes steps to disassemble the gear pump by removing housing bolts, seals, gears, and plates. It also describes removing the main hydraulic pump by disconnecting hoses and harnesses, removing mounting bolts, and lifting out the pump along with attached auxiliary pumps and pilots.
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3. S/N - TMF1-UP
S/N - WDJ1-UP
S/N - XAN1-UP
S/N - XBB1-UP
S/N - XCC1-UP
S/N - YEA1-UP
S/N - ZBD1-UP
S/N - ZCS1-UP
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-1857 Retaining Ring Pliers 1
Start By:
a. Remove the gear pump. Refer to Disassembly and Assembly, "Gear Pump (Pilot) -
Remove".
Illustration 1 g01202274
1. Remove bolts (1) and housing (2) from flange (3).
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4. Illustration 2 g01202276
2. Remove O-ring seal (4).
Illustration 3 g01202275
3. Use Tooling (A) in order to remove retaining ring (5).
4. Remove lip seal (6).
Illustration 4 g01202277
5. Remove plate (7) and seal (8).
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5. Illustration 5 g01202278
6. Remove balls (9) and gears (10).
Illustration 6 g01202279
7. Remove plate (11).
Illustration 7 g01202280
8. Remove seal (12).
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Wed Feb 12 16:16:25 UTC+0800 2020
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7. S/N - TMF1-UP
S/N - WDJ1-UP
S/N - XAN1-UP
S/N - XBB1-UP
S/N - XCC1-UP
S/N - YEA1-UP
S/N - ZBD1-UP
S/N - ZCS1-UP
Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-1857 Retaining Ring Pliers 1
Illustration 1 g01202280
1. Install seal (12).
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8. Illustration 2 g01202279
2. Install plate (11).
Illustration 3 g01202278
3. Install balls (9) and gears (10).
Illustration 4 g01202277
4. Install seal (8) and plate (7).
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9. Illustration 5 g01202275
5. Install lip seal (6).
6. Use Tooling (A) in order to install retaining ring (5).
Illustration 6 g01202276
7. Install O-ring seal (4).
Illustration 7 g01202274
8. Install flange (3) onto housing (2).
9. Install bolts (1).
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10. End By:
a. Install the gear pump. Refer to Disassembly and Assembly, "Gear Pump (Pilot) - Install".
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Wed Feb 12 16:17:28 UTC+0800 2020
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12. S/N - TMF1-UP
S/N - WDJ1-UP
S/N - XAN1-UP
S/N - XBB1-UP
S/N - XCC1-UP
S/N - YEA1-UP
S/N - ZBD1-UP
S/N - ZCS1-UP
Installation Procedure
Illustration 1 g01213458
1. Install O-ring seal (5). Install gear pump (3). Install bolts (2). Connect hose assemblies (1)
and (4).
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Wed Feb 12 16:18:30 UTC+0800 2020
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13. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 320D2 EXCAVATOR XCC
Configuration: 320D2 L Excavator XCC00001-UP (MACHINE) POWERED BY C7.1 Engine
Disassembly and Assembly
320D2 Excavator Machine Systems
Media Number -UENR3252-09 Publication Date -01/07/2015 Date Updated -30/07/2018
i02427682
Main Hydraulic Pump - Remove
SMCS - 5070-011
S/N - DFM1-UP
S/N - DNP1-UP
S/N - EAL1-UP
S/N - EKT1-UP
S/N - ESG1-UP
S/N - FKK1-UP
S/N - GBA1-UP
S/N - HDM1-UP
S/N - JFM1-UP
S/N - KHR1-UP
S/N - LMA1-UP
S/N - NBT1-UP
S/N - RDZ1-UP
S/N - SDZ291-UP
S/N - STN1-UP
S/N - TGJ1-UP
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14. S/N - TMF1-UP
S/N - WDJ1-UP
S/N - XAN1-UP
S/N - XBB1-UP
S/N - XCC1-UP
S/N - YEA1-UP
S/N - ZBD1-UP
S/N - ZCS1-UP
Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 138-7575 Link Bracket 1
B 1U-9200 Lever Puller Hoist 1
C 138-7573 Link Brackets 2
Start By:
a. Remove the muffler. Refer to Disassembly and Assembly, "Muffler - Remove".
b. Release the hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic
System Pressure - Release".
1. Drain the hydraulic tank. Refer to Operations and Maintenance Manual, "Hydraulic System
Oil - Change".
Illustration 1 g01213554
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18. Illustration 11 g01215389
11. Remove bolts (26). Disconnect tube assembly (27).
Illustration 12 g01215450
12. Remove bolts (28) and reposition filter assembly (29). Remove bolts (30) and reposition
filter assembly (31).
Illustration 13 g01215556
13. Attach Tooling (A), (B), and (C) and a suitable lifting device to main hydraulic pump (32).
The weight of main hydraulic pump (32) is approximately 250 kg (550 lb). Remove bolts
(33) and main hydraulic pump (32).
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19. Illustration 14 g01215580
14. Remove bolt (34) and gear (35).
Illustration 15 g01215665
15. Remove bolts (36) and auxiliary pump (37).
Illustration 16 g01215672
16. Remove Coupling (39) and O-ring seal (40). Remove bolts (38) and adapter (41).
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20. Illustration 17 g01215724
17. Remove bolts (42) and pilot pump (43).
Illustration 18 g01215928
18. Remove O-ring seal (44).
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Wed Feb 12 16:19:33 UTC+0800 2020
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21. Shutdown SIS
Previous Screen
Product: EXCAVATOR
Model: 320D2 EXCAVATOR XCC
Configuration: 320D2 L Excavator XCC00001-UP (MACHINE) POWERED BY C7.1 Engine
Disassembly and Assembly
320D2 Excavator Machine Systems
Media Number -UENR3252-09 Publication Date -01/07/2015 Date Updated -30/07/2018
i05916114
Main Hydraulic Pump - Disassemble
SMCS - 5070-015
S/N - DFM1-UP
S/N - DNP1-UP
S/N - EAL1-UP
S/N - EKT1-UP
S/N - ESG1-UP
S/N - FKK1-UP
S/N - GBA1-UP
S/N - HDM1-UP
S/N - JFM1-UP
S/N - KHR1-UP
S/N - LMA1-UP
S/N - NBT1-UP
S/N - RDZ1-UP
S/N - SDZ291-UP
S/N - STN1-UP
S/N - TGJ1-UP
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22. S/N - TMF1-UP
S/N - WDJ1-UP
S/N - XAN1-UP
S/N - XBB1-UP
S/N - XCC1-UP
S/N - YEA1-UP
S/N - ZBD1-UP
S/N - ZCS1-UP
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 5F-7465 Puller Group 1
B 1P-2420 Transmission Repair Stand 1
C 138-7575 Link Bracket 3
D 1P-0510 Driver Group 1
E 1P-1859 Retaining Ring Pliers 1
F 9S-9152 Bearing Puller 1
G 8B-7551 Bearing Puller 1
Start By:
A. Remove the main hydraulic pump. Refer to Disassembly and Assembly, "Main Hydraulic
Pump - Remove" for the machine that is being serviced.
NOTICE
Keep all parts clean from contaminants.
Contamination of the hydraulic system with foreign material will
reduce the service life of the hydraulic system components.
To prevent contaminants from entering the hydraulic system, always
plug or cap the lines, fittings, or hoses as they are disconnected. Cover
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23. any disassembled components and clean them properly before
assembly.
Clean the hydraulic system properly after any major component
exchange or especially after a component failure, to remove any
contamination.
Note: Cleanliness is an important factor. Before the disassembly procedure, clean the exterior of
the component . Cleaning will prevent dirt from entering the internal mechanism.
Note: Only the right pump control is equipped with the proportional reducing valve. The left
pump control starts with Step 4.
Illustration 1 g01200312
1. Remove bolts (2) , pump control (1) , and fitting (3) .
Illustration 2 g01202630
Right Pump Only
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24. 2. Remove bolts (4) . Remove proportional reducing valve (5) from pump control (1) .
Illustration 3 g01202631
Right Pump Only
3. Remove O-ring seal (9) , O-ring seal (8) , O-ring seal (7) , and O-ring seal (6) from the
proportional reducing valve.
Illustration 4 g00706166
4. Remove nut (10) from the pump control.
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25. Illustration 5 g00882598
5. Measure the length of screw (13) for installation purposes. Remove screw (13) . Remove
bolts (11) . Remove cover (12) from the pump control.
Illustration 6 g00706177
6. Remove stopper (14) from the pump control.
Illustration 7 g00706179
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26. 7. Remove O-ring seal (15) and backup ring (16) from the stopper.
8. Repeat Step 4 through Step 7 for the other side of the pump control.
Illustration 8 g00706239
9. Place the pump control in a soft jawed vise. Support pin assembly (17) . Remove piston (18)
from the pump control. Remove pin assembly (17) from the pump control.
Illustration 9 g00706243
10. Remove dowel pin (19) from the pin.
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27. 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
28. Illustration 10 g00706249
11. Remove bolts (20) . Remove cover assembly (21) from the pump control.
Illustration 11 g00882599
Personal injury can result from parts and/or covers under spring
pressure.
Spring force will be released when covers are removed.
Be prepared to hold spring loaded covers as the bolts are loosened.
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