VALVE GP-CONTROL 3851818 - Caterpillar

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.
Illustration 1 g02126222The hydraulic filter is located on the right side of the machine under the platform. The filter must be replaced during this procedure.
Use a strap type wrench to remove the filter element. Dispose of the used filter element properly.
Clean the filter mounting bases. Make sure that all of the used seals are removed.
Illustration 2 g00101318
Apply a thin coat of hydraulic oil to the seals on the new filter. Install the new hydraulic oil filter hand tight until the seal of the hydraulic oil filter contact the filter base. Note the position of the index marks on the filter in relation to a fixed point on the filter base. Note: There are rotation index marks on the hydraulic oil filter that are spaced 90 degrees or 1/4 of a turn away from each other. When you tighten the hydraulic oil filter, use the rotation index marks as a guide.
Tighten the filter according to the instructions that are printed on the filter. Use the index marks as a guide. For non-Caterpillar filters, use the instructions that are provided with the filter. Note: If necessary, use a Caterpillar strap wrench in order to turn the filter to the amount that is required for final installation. Make sure that the installation tool does not damage the filter.
Illustration 3 g02197694
The case drain filter is located on the top of the hydraulic tank. Raise the engine hood. Refer to the Operation and Maintenance Manual, "Hood Tilt".
Remove the four bolts on the cover.
Remove the filter element.
Install a new filter element.
Install the filter cover and the four bolts.
Lower the engine hood.
Start the engine and run the engine at low idle. Inspect the hydraulic system for leaks.
Illustration 4 g02175974
The oil gauge and the hydraulic oil filler are on the left side of the machine above the platform. Maintain the oil level above the "ADD COLD" mark on the sight gauge. Add hydraulic oil, if necessary.