This document provides assembly and disassembly instructions for the main hydraulic pump of a M315C wheeled excavator. It lists 42 steps to disassemble the pump by removing components like valves, springs, pistons, seals and bearings. It notes to mark components' orientations. Reassembly follows the reverse of disassembly, noting to replace bolts and apply threadlock. Safety warnings caution of parts under spring pressure and ensuring fluid containment.
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: WHEELED EXCAVATOR
Model: M315C WHEELED EXCAVATOR BDM
Configuration: M315C Excavator BDM02001-UP (MACHINE) POWERED BY 3054E Engine
Disassembly and Assembly
M315C Excavator Machine Systems
Media Number -RENR6971-03 Publication Date -01/02/2009 Date Updated -17/02/2009
i01904607
Piston Pump (Main Hydraulic) - Disassemble
SMCS - 5070-015
Disassembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-1861 Retaining Ring Pliers 1
B 1U-7600 Slide Hammer Puller Gp 1
Start By:
A. Remove the main hydraulic pump. Refer to Disassembly and Assembly, "Main Hydraulic
Pump - Remove".
Note: Cleanliness is an important factor. Before you begin the disassembly procedure, the exterior
of the components should be thoroughly cleaned. This will help to prevent dirt from entering the
internal mechanism. Precision components can be damaged by contaminants or by dirt. Perform
disassembly procedures on a clean work surface. Keep components covered and protected at all
times.
Note: Put identification marks on all hoses, on all hose assemblies, on all wires, and on all tube
assemblies for installation purposes. Plug all hose assemblies and all tube assemblies. This helps
to prevent fluid loss, and this helps to keep contaminants from entering the system.
Note: Put orientation and location marks on all fittings for installation purposes.
NOTICE
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3. 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, "Caterpillar Tools and Shop
Products Guide" for tools and supplies suitable to collect and contain
fluids on Caterpillar products.
Dispose of all fluids according to local regulations and mandates.
Illustration 1 g00902619
1. Remove drain plug (4) from main hydraulic pump (1). Drain the oil from main hydraulic
pump (1) into a suitable container.
2. Remove bolts (3) from valve group (2). Remove valve group (2) from main hydraulic pump
(1) .
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4. Illustration 2 g00902640
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.
3. Remove O-ring seals (5) and O-ring seal (7) .
4. Remove roller (9), spring (8), and piston (6) .
Illustration 3 g00902650
5. Remove plug assembly (11). Remove O-ring seal (10) from plug assembly (11) .
6. Remove piston (12) .
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5. Illustration 4 g00902662
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.
7. Remove plug (17). Remove spring retainer (16), spring (15), spring (14), and spring retainer
(13) from plug (17). Remove O-ring seal (18) from plug (17) .
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6. Illustration 5 g00902800
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.
8. Remove valve (25) from valve group (2). Remove O-ring seal (24) from plug (25). Remove
the following components from valve group (2) : retainer (23), spring (22), retainer (21),
spool (20) and pin (19) .
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7. Illustration 6 g00902801
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.
9. Remove plug (26) from valve group (2). Remove the following components from valve
group (2) : retainer (27), retainer (28), spring (29), retainer (30), spool (31) and pin (32) .
Illustration 7 g00902814
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8. 10. Remove retaining ring (33) from valve group (2) .
Illustration 8 g00902815
11. Remove bolt (34) and lever (35) from valve group (2) .
Illustration 9 g00902827
12. Remove O-ring seal (37) from flange (39) .
13. Remove clutch hub (38) from the pump drive shaft.
14. Remove bolts (36). Remove flange (39) from the main hydraulic pump.
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9. Illustration 10 g00902833
15. Remove O-ring seal (40) from the back side of flange (39) .
Illustration 11 g00902844
Illustration 12 g00902845
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10. 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.
Note: The seat adjustment groups (43) and (44) will come apart as pump adapter (41) is
being removed from the main hydraulic pump. To prevent mixing of parts, slowly remove
pump adapter (41) .
16. Remove bolts (42). Remove pump adapter (41) .
Illustration 13 g00902859
Illustration 14 g00902860
17. Remove seat adjuster group (43). Remove rod (47), piston (46), and spring (45) .
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11. Illustration 15 g00902869
Illustration 16 g00902872
18. Remove rod (51) from piston (49).
19. Remove piston (49), spring (50), and bushing (48) .
Illustration 17 g00902888
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12. 20. Mark the position of port plate (52) in relation to the pump adapter. Remove port plate (52)
from pump adapter (41) .
Illustration 18 g00902892
21. Remove bearing (53) from pump adapter (41) .
Illustration 19 g00902897
22. Remove bolts (55) from sensor (54). Remove sensor (54) from main hydraulic pump (1) .
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13. Illustration 20 g00902898
23. Remove bolts (56) from plate (57). Remove plate (57) from main hydraulic pump (1) .
Illustration 21 g00902909
24. Mark the position of the maximum angle stop screw (58) prior to removal from the main
hydraulic pump (1). Remove maximum angle stop screw (58). Repeat for the opposite side
of the main hydraulic pump.
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14. Illustration 22 g00902972
25. Remove O-ring seal (61). Remove swashplate (60) and barrel assembly (59) as one piece.
Illustration 23 g00902981
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15. Illustration 24 g00903667
Note: Mark barrel (66), pistons (61), and swashplate (60) for orientation.
26. The swashplate must be heated in order to melt the thread lock. Remove bolts (65) from
swashplate (60).
Note: Bolts (65) should be replaced with new bolts.
27. Remove retainers (64) from swashplate (60).
28. Remove barrel assembly (59) from swashplate (60).
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16. Illustration 25 g00903053
29. Remove pistons (61) from barrel (66).
Illustration 26 g00903178
30. Remove retainer plate (62) from pistons (61) .
Illustration 27 g00903180
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17. Illustration 28 g00903181
31. Remove retainer (67) from barrel (66) .
32. Remove cup springs (68) and shims (69) from barrel (66) .
Note: Mark orientation of cup springs (68) and shims (69) for installation.
Illustration 29 g00903182
33. Remove plugs (70) and slotted pins (71) .
Illustration 30 g00903209
34. Remove rods (72) from swashplate (60) .
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18. Illustration 31 g00903210
35. Remove bearings (73 ) from main hydraulic pump (1) .
Illustration 32 g00903220
36. Remove outer races (74) from main hydraulic pump (1) .
Illustration 33 g00903222
37. Use Tooling (A) to remove retaining ring (75) .
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19. 38. Use Tooling (B) to remove seal (76) .
39. Use Tooling (A) to remove retaining ring (77) .
Illustration 34 g00903243
40. Remove shaft (78) from main hydraulic pump (1) .
Illustration 35 g00903244
41. Remove retaining ring (79) from shaft (78) .
42. Remove bearing (80) from shaft (78). Use a suitable press to remove bearing (80) .
Copyright 1993 - 2020 Caterpillar Inc.
All Rights Reserved.
Private Network For SIS Licensees.
Sat May 2 16:37:06 UTC+0800 2020
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20. Shutdown SIS
Previous Screen
Product: WHEELED EXCAVATOR
Model: M315C WHEELED EXCAVATOR BDM
Configuration: M315C Excavator BDM02001-UP (MACHINE) POWERED BY 3054E Engine
Disassembly and Assembly
M315C Excavator Machine Systems
Media Number -RENR6971-03 Publication Date -01/02/2009 Date Updated -17/02/2009
i01904610
Piston Pump (Main Hydraulic) - Assemble
SMCS - 5070-016
Assembly Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 1P-1861 Retaining Ring Pliers 1
C 128-2746 Test Ring 1
D 129-3874 Measuring Hub 1
E 128-2744 Measuring Bell 1
F ------ Vernier Height Gauge 1
G 1P-0510 Driver Gp 1
H 128-2742 Alignment Plug 1
J 9S-3263 Thread Lock Compound 1
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21. Illustration 1 g00903244
1. Install bearing (80) to shaft (78). Raise the temperature of bearing (80). Install retaining ring
(79) to shaft (78) .
Illustration 2 g00903358
2. Install shaft (78) to main hydraulic pump (1) .
Illustration 3 g00903222
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22. 3. Use Tooling (A) to install retaining ring (77) .
4. Use Tooling (G) to install seal (76) .
5. Use Tooling (A) to install retaining ring (75) .
Illustration 4 g00903220
6. Install outer races (74) to main hydraulic pump (1) .
Illustration 5 g00903209
7. Install rods (72) to swashplate (60) .
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24. Illustration 6 g00903415
8. Install bearings (73 ) to swashplate (60). Install a rubber band to each bearing (73). The
rubber band will hold bearing (73) to swashplate (60) .
Illustration 7 g00903418
9. Carefully install swashplate (60) to main hydraulic pump (1) .
Illustration 8 g00903482
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25. 10. Cut the rubber band on each bearing (73) .
Illustration 9 g00903182
Note: Rods (72) must engage slotted pins (71) .
11. Install plugs (70) and slotted pins (71) .
Illustration 10 g00902909
12. Install the maximum angle stop screw (58). Repeat for the opposite side of the main
hydraulic pump.
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