Caterpillar Cat M315C WHEELED Excavator (Prefix BDM) Service Repair Manual (BDM02001 and up)

Service

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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

Piston Pump (Main Hydraulic) - Disassemble

SMCS - 5070-015

Disassembly Procedure

Table 1

Required Tools

A 1P-1861 Retaining Ring Pliers 1

B 1U-7600 Slide Hammer Puller Gp 1

Start By:

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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.

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

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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) .

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) .

5. Remove plug assembly (11). Remove O-ring seal (10) from plug assembly (11) .

6. Remove piston (12) .

Illustration 2

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Illustration 3

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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.

Illustration 4

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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) .

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) .

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

10. Remove retaining ring (33) from valve group (2) .

11. Remove bolt (34) and lever (35) from valve group (2) .

Illustration 9

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.

Illustration 8 g00902815

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15. Remove O-ring seal (40) from the back side of flange (39)

Illustration 10 g00902833

.

Illustration 11 g00902844

Illustration 12 g00902845

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) .

17. Remove seat adjuster group (43). Remove rod (47), piston (46), and spring (45) .

Illustration 13

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Illustration 14 g00902860

Illustration 16

18. Remove rod (51) from piston (49).

19. Remove piston (49), spring (50), and bushing (48) .

Illustration 15

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Illustration 17

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20. Mark the position of port plate (52) in relation to the pump adapter. Remove port plate (52) from pump adapter (41) .

Illustration 18

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21. Remove bearing (53) from pump adapter (41) .

Illustration 19

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22. Remove bolts (55) from sensor (54). Remove sensor (54) from main hydraulic pump (1) .

Illustration 20

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23. Remove bolts (56) from plate (57). Remove plate (57) from main hydraulic pump (1) .

Illustration 21

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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.

25. Remove O-ring seal (61). Remove swashplate (60) and barrel assembly (59) as one piece.

Illustration 22

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Illustration 23

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Illustration 24

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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).

Illustration 25

29. Remove pistons (61) from barrel (66).

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Illustration 26

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30. Remove retainer plate (62) from pistons (61) .

Illustration 27

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Illustration 28

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

33. Remove plugs (70) and slotted pins (71) .

Illustration 30

34. Remove rods (72) from swashplate (60) .

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Illustration 31

35. Remove bearings (73 ) from main hydraulic pump (1) .

Illustration 32

36. Remove outer races (74) from main hydraulic pump (1) .

Illustration 33

37. Use Tooling (A) to remove retaining ring (75) .

38. Use Tooling (B) to remove seal (76) .

39. Use Tooling (A) to remove retaining ring (77) .

Illustration 34

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40. Remove shaft (78) from main hydraulic pump (1) .

Illustration 35

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41. Remove retaining ring (79) from shaft (78) .

42. Remove bearing (80) from shaft (78). Use a suitable press to remove bearing (80) .

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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

Piston Pump (Main Hydraulic) - Assemble

SMCS - 5070-016

Assembly Procedure

Required Tools

the temperature of bearing (80). Install retaining ring (79) to

Illustration 1

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1. Install bearing (80) to shaft (78). Raise

shaft (78) .

Illustration 2

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2. Install shaft (78) to main hydraulic pump (1) .

Illustration 3

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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) .

6. Install outer races (74) to main hydraulic pump (1) .

7. Install rods (72) to swashplate (60) .

Illustration 4

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Illustration 5 g00903209

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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) .

9. Carefully install swashplate (60) to main hydraulic pump (1) .

Illustration 6 g00903415

Illustration 7 g00903418

Illustration 8

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10. Cut the rubber band on each bearing (73) .

Note: Rods (72) must engage slotted pins (71) .

11. Install plugs (70) and slotted pins (71) .

12. Install the maximum angle stop screw (58). Repeat for the opposite side of the main hydraulic pump.

Illustration 9 g00903182

Illustration 10 g00902909