SCREEN GP-HYDRAULIC 1257178 - Caterpillar

Illustration 1 g01089503
Park the machine on level ground. Place the machine in the servicing position.
Move the hydraulic lockout control to the UNLOCKED position.
Turn the engine start switch to the ON position.
Move the joysticks and the travel levers/pedals to the full stroke positions in order to relieve the pressure in the pilot lines.
Turn the engine start switch to the OFF position and return the lever for the hydraulic lockout control to the LOCKED position.
Illustration 2 g01208340
Slowly loosen the fill/vent plug on top of the hydraulic tank in order to relieve the internal pressure of the hydraulic tank.
After the pressure is relieved, tighten the fill/vent plug.
Open the access door on the right side of the machine.
Illustration 3 g01121031
The case drain filter is located near the pilot oil filter.
Clean the area in order to keep dirt out of the filter base.
Remove the used case drain filter from the filter base.Note: Used filters should always be disposed of according to local regulations.
Clean the filter base.
Illustration 4 g00101502
Coat the seal of a new case drain filter with clean hydraulic oil.
Install the new oil filter by hand. Instructions for the installation of the filter are printed on the side of each Caterpillar spin-on filter. For non-Caterpillar filters, refer to the installation instructions that are provided by the supplier of the filter.
Start the engine and operate the machine slowly for 10 to 15 minutes. Move each cylinder evenly through several cycles.
Illustration 5 g01089503
Return the machine to the position that is shown in Illustration 5. Check the machine for oil leaks.
Stop the engine.
Check the hydraulic oil level.ReferenceFor the correct procedure, refer to Operation and Maintenance Manual, "Hydraulic System Oil Level - Check".
Close the access door.