Start By:
a. Release the hydraulic system pressure.
Note: The removal procedure is similar for both of the pilot valves. The procedure which follows is for the removal of the left-hand pilot valve.
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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. |
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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 work tool 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. |
- Remove boot (3). Remove covers (2) and (6). Remove cover (5) and remove screws at the rear of the cover. Remove the remaining screws (1). Remove cover (4).
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Illustration 2 g01215042 - Disconnect harness assemblies (9). Remove bolts (7). Disconnect hose assemblies (10). Remove pilot valve (8).
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| Illustration 1 | g06034716 |
Note: The installation procedure is similar for both of the pilot valves. The procedure which follows is for the installation of the left-hand pilot valve.
- Position pilot valve (8). Connect hose assemblies (10). Install bolts (7). Connect harness assemblies (9).
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Illustration 4 g06034716 - Install cover (4). Install screws (1). Install screws at the rear of the cover. Install cover (5). Install cover (6) and (2). Install boot (3).
- Check the oil level in the hydraulic oil tank. Fill the hydraulic oil tank with oil to the correct level. Refer to Operation and Maintenance Manual, "Lubricant Viscosities" for the proper oil viscosity and Operation and Maintenance Manual, "Hydraulic System Oil Level - Check" for the correct filling procedure.
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| Illustration 3 | g01215042 |