PUMP GP-GOV & FUEL INJ 1N3103 - Caterpillar

Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact skin.
Illustration 1 g02419476
Park the machine on level ground in the service position as shown.
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 to relieve the pressure in the hydraulic lines.
Turn the engine start switch to the OFF position and return the lever for the hydraulic lockout control to the LOCKED position.
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. Tighten the filler cap on the hydraulic tank to position (A).
The oil filter for the hammer is located near the base of the boom.Note: Some configurations may invert the hammer filter installation.
Illustration 3 g02902799
(1) Filter case
(2) Filter element
(3) Filter base
Position a suitable container to contain the oil.Note: Refer to Operation and Maintenance Manual, "General Hazard Information" for information on containing fluid spillage.
Loosen filter case (1).
Lift filter case (1) to remove filter element (2).
Remove the used filter element from filter base (3).Note: The element cannot be reused.Note: Used filter elements should always be disposed of according to local regulations.
Clean filter case (1) and inspect the O-ring for damage. Replace the O-ring if necessary.
Install the new filter element.
Illustration 4 g02909599
Assemble filter case (1). Tighten the nut on the filter case to a torque of 100 10 N m (74 7 lb ft).
Illustration 5 g02909737
Remove plug (4) and inspect O-ring (5) for damage. Replace the O-ring if necessary. Tighten plug (4) to a torque of 60 5 N m (44 3.5 lb ft)
Start the engine and operate the machine slowly for 10 to 15 minutes. Move each cylinder evenly through several cycles and operate the hammer.
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".