| Required Tools | |||
|---|---|---|---|
| Tool | Part Number | Part Description | Qty |
| A | 3E-3879 | Eyebolts | 2 |
| B | 1P-2420 | Transmission Repair Stand | 1 |
| C | 1P-1863 | Retaining Ring Pliers | 1 |
| D | 1P-0510 | Driver Gp | 1 |
| E | 1P-0074 | Slide Hammer Puller Gp | 1 |
Start By:
- Remove the brake pump. Refer to Disassembly and Assembly, "Piston Pump (Brake Cooling Motor Drive) - Remove" in this manual.
Note: Regular maintenance and frequent inspections are routine precautions. Practice preventive maintenance before damage occurs. Preventive maintenance can help to avoid a failure. If a failure occurs, an accurate diagnosis of the cause can prevent a recurrence. Information is available to analyze failures for piston pumps and motors. Refer to Special Publication, SEBV0563, "Analyzing Axial Piston Pump and Motor Failures".
Note: Many times, the installation of new parts is not necessary. The installation of used parts during reconditioning is acceptable. Used parts can result in a substantial cost reduction. Reusable information is available on piston pumps and motors. Refer to Special Publication, SEBF8032, "Guideline For Reusable Parts - Piston Pumps and Motors". During reconditioning, correct any conditions that might have caused the original failure.
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. Dirt and contaminants can damage precision components that are in pumps and motors. All Disassembly and Assembly procedures must be performed on a clean work surface. Clean all the interior components in clean solvent. Dry all the interior components with compressed air. Plug ports and plug hoses on the machine during repair.
| 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 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. |
Note: The hydraulic oil must be contained in the proper manner. Refer to Special Publication, NENG7004, "Contamination Control Catalog".
Note: The weight of the fan drive pump is
- Use Tooling (A) in order to install the pump on Tool (B). Secure the pump to Tool (B).
Note: Install the pump DOWNWARD on Tool (B).
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Illustration 2 g00815414 - Remove bolts (1). Remove coil assembly (2).
- Measure the placement of adjustment screw (3) prior to removal. Remove screw (3).
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Illustration 3 g00815421 - Remove spool assembly (4).
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Illustration 4 g00815423 - Remove seat (5). Remove spring (6).
- Disassemble spool (4).
- Remove piston (8) and spring (7) from spool (4).
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Illustration 5 g00815529 Show/hide table
Illustration 6 g00815425 - Remove bolts (9). Remove pressure and flow compensating valve (10).
- Disassemble pressure and flow compensating valve (10).
- Remove piston (11), retainers (12), spring (13), O-ring (14), plug (15) and setscrew (16).
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Illustration 7 g00815612 Show/hide table
Illustration 8 g00815673 - Remove lever (17).
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Illustration 9 g00816212 - Remove bolts (18). Remove adapter plate (19).
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Illustration 10 g00815698 - Remove bolts (20). Remove flange (21).
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Illustration 11 g00815724 - Use Tool (C) to remove snap ring (22).
- Remove impeller (23).
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Illustration 12 g00815740 - Use Tool (C) to remove snap ring (24).
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Illustration 13 g00815763 - Remove bolts (25).
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Illustration 14 g00815776 - Place alignment marks on head assembly (26) and housing (27). Use Tool (B) and a suitable lifting device to remove head assembly (26) from housing (27). The weight of head assembly (26) is
21 kg (46 lb) .Note: The port plate can fall when the head assembly is removed.
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Illustration 15 g00815843 - Remove pump port plate (28) from head assembly (26).
Note: Note the location of the inlet and the outlet of the pump port plate.
Note: The pump port plate may not release easily. The pump port plate is secured with pins. DO NOT use any hard tool on the surface of the pump port plate. The pump port plate is manufactured with soft metal. The pump port plate can be damaged. Remove the pump port plate from the edges.
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Illustration 16 g00815863 - Remove shuttle valve group (29) from head assembly (26).
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Illustration 17 g00815977 - Remove bushing (30) from head assembly (26).
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Illustration 18 g00817313 - Use a suitable press and Tool (D) in order to remove bearing (31) from head assembly (26).
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Illustration 19 g00816234 - Remove piston assemblies (32) and pump actuator group (33).
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Illustration 20 g00816508 - Disassemble the piston assembly (32), as follows: spring (34), piston (35) and rod (36).
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Illustration 21 g00816528 - Disassemble pump actuator group (33), as follows: rod (37), piston (38) and spring (39).
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Illustration 22 g00816546 - Remove bolts (40). Use caution when the bolts are removed. The bolts are installed with thread lock. Remove retainers (41).
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Illustration 23 g00816579 - Measure Dimension (X) and Dimension (Y). Record the measurements for assembly purposes. Loosen threaded pin (42). Tighten threaded pin (43) in order to contact the swashplate. Tighten the locknuts.
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Illustration 24 g00816675 - Place the pump on a level surface. Remove barrel assembly (44). Keep the barrel assembly together with the pistons.
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Illustration 25 g00816730 - Mark pistons (45) so the pistons can be installed in the original bores.
- Remove pistons (45) from barrel (47) and plate (46) from the pistons.
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Illustration 26 g00816748 - Remove spring retainer (48).
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Illustration 27 g00817212 - Remove shims (49) and springs (50).
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Illustration 28 g00816924 - Loosen the locknut and setscrew (42) (not shown). Remove the hidden setscrew and locknut (43). Remove swashplate assembly (51).
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Illustration 29 g00817100 - Remove pins (52). Remove bearings (53) from swashplate (51).
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Illustration 30 g00817124 - Remove bearing sleeves (54).
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Illustration 31 g00817229 - Remove plugs (55).
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Illustration 32 g00817287 Show/hide table
Illustration 33 g00817238 - Remove guide pins (56).
Note: Guide pins (56) are slotted in order to secure pins (52) during the assembly procedure.
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Illustration 34 g00817300 - Remove bolts (57). Remove seal carrier (58).
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Illustration 35 g00817308 - Remove seal (59). Remove two O-rings (60).
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Illustration 36 g00817626 - Use Tool (C) to remove retaining ring (62) from shaft (61).
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Illustration 37 g00817632 - Remove bearing race (63).
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Illustration 38 g00817634 - Use a soft faced hammer in order to remove shaft (61).
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Illustration 39 g00817976 - Remove spacer (64) from shaft (61).
Note: Shaft (61) must be removed from housing (27) in order to allow spacer (64) to be removed.
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Illustration 40 g00816021 - Use Tool (E) and remove bearing (65) from housing (27).
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