Removal Procedure
| NOTICE |
|---|
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. 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 in Caterpillar machines. Dispose of all fluids according to local regulations and mandates. |
 |
At operating temperature, the hydraulic oil is hot and under pressure. Hot oils can cause burns. To prevent possible personal injury, release the pressure in the implement hydraulic circuit (boom, stick, bucket, and swing), travel circuits, and the hydraulic oil tank at the filler cap before any hydraulic lines or components are disconnected or removed. Remove the filler cap only when the engine is stopped and the filler cap is cool enough to touch. |
 |
- Release hydraulic system pressure. Refer to Disassembly and Assembly, "Hydraulic System Pressure - Release" in this manual.
- Remove lines (1), bolts (2) and pilot pump (3) .
Note: Put plugs in the ends of the hoses in order to keep dirt and debris out of the hydraulic system. Put identification marks on all of the lines for assembly purposes.
 | |
| Illustration 1 | g00368697 |
Installation Procedure
| NOTICE |
|---|
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the machine. 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 in Caterpillar machines. Dispose of all fluids according to local regulations and mandates. |
- Check the O-ring seals in the body of the main pump and in the ends of lines (1). If any of the O-ring seals are damaged, use new parts for replacement. Lubricate the seals with clean hydraulic oil.
- Position pilot pump (3) on the main pump. Install the bolts (2) which hold pilot pump (3) to the main pump. Tighten the bolts to a torque of 26 ± 3 N·m (19 ± 2 lb ft).
| | |
| Illustration 2 | g00368697 |
- Connect lines (1) to the pilot pump.
- Check the oil level in the hydraulic oil tank. Fill the hydraulic oil tank to the correct level.
Note: Refer to Operation and Maintenance Manual, "Lubricant Viscosities and Refill Capacities" for the proper filling procedure and the proper level for the hydraulic oil system.