CABLE 5344240 - Caterpillar

Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact skin.
The return filter is a cartridge type filter. The amount of foreign material that enters the hydraulic system is reduced when the filter element is replaced.Two different filters are available for the return filter. One filter is used for standard applications such as digging and normal use of a hammer. The second filter is used for an application such as demolishing a ceiling in a tunnel with a hammer.Note: If the message display shows that the hydraulic return filter is plugged, turn off the machine. After you make sure that the warning has disappeared, start the machine and run the machine on level ground for approximately 10 minutes. If the warning still appears in the message display, inspect the filter and replace the filter, if necessary.
Illustration 1 g06182169
Remove five bolts (1) and washers (2). Remove cover (3) from the top of the hydraulic tank.
Clean the area thoroughly to keep dirt out of the return filter and filler cap.
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. Relieve pressure by slowly turning the cap until the cap reaches the secondary stop.
Illustration 2 g06184990
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 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).
Move the arrow from position (C) to position (D).
After the tank pressure is relieved, tighten the filler cap on the hydraulic tank to position (A).
Check the hydraulic system oil level.Reference: For the correct procedure, refer to Operation and Maintenance Manual, "Hydraulic System Oil Level - Check".
Illustration 3 g06254537
Remove four bolts (4), disconnect the harness connector from the filter bypass switch, and remove cover assembly (5) from the tank. Inspect the O-ring on the cover for damage and replace as necessary.
Illustration 4 g06254829
Remove filter element (6) and discard. Install a new element into the filter case.
Illustration 5 g06254537
Place cover assembly (5) into position in the tank. Install four bolts (4) and tighten to 30 7 N m (22 5 lb ft). Install the harness connector on the filter bypass switch.
Illustration 6 g06182169
Position cover (3) in place on the top of the hydraulic tank. Install five bolts (1) and washers (2).