TUBE AS 1531833 - Caterpillar

Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact skin.
Park the machine on level ground.
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 1 g02024028
Pressurized system!The hydraulic tank contains hot oil under pressure. To prevent burns from the sudden release of hot oil, relieve the tank pressure with the engine off by slowly turning the cap approximately 1/8 of a turn until the cap reaches the secondary stop.
Illustration 2 g02275615
Filler cap
(A) LOCK position
(B) PRESSURE RELEASE - START position
(C) PRESSURE RELEASE - END position
(D) OPEN position
Release the pressure that may be present in the return hydraulic circuit with the following procedure. Refer to Illustration 2 for filler cap positions.
Turn the filler cap counterclockwise, with no downward force applied, and move the arrow from position (A) to position (B).
Release the pressure for a minimum of 45 seconds by moving the arrow from position (B) to position (C).
Push the center of the filler cap down. Without tilting the filler cap, move the arrow from position (C) to position (D).
The hydraulic tank pressure is relieved. The filler cap can now be removed if needed.
Tighten the filler cap on the hydraulic tank to position (A).
After the pressure is relieved, tighten the filler cap.
Open the access door on the right side of the machine.
Illustration 3 g03360897
The case drain filter is located near the pilot oil filter.
Clean the area in order to keep dirt out of the filter base. Note: Refer to Operation and Maintenance Manual, "General Hazard Information" for information on containing fluid spillage.
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 Cat spin-on filter.
Start the engine and operate the machine slowly for 10 to 15 minutes. Move each cylinder evenly through several cycles.
Return the machine to the service position. Check the machine for oil leaks.
Stop the engine.
Check the hydraulic oil level. Reference: For the correct procedure, refer to Operation and Maintenance Manual, "Hydraulic System Oil Level - Check".
Close the access door.