GEAR-SUN 1695535 - Caterpillar

Illustration 5 g03751945
The oil drain valve is located under the hydraulic tank.
Remove the hydraulic tank access cover that is located under the upper structure. Removing the cover will allow access to the drain valve.
Illustration 6 g01124017
(4) PlugNote: Refer to Operation and Maintenance Manual, "General Hazard Information" for information that pertains to containing fluid spillage.
Remove plug (4).
Inspect the O-ring. Replace the O-ring if wear or damage is evident.
Illustration 7 g01124018
(5) Swivel hose
(6) Drain plug
Install swivel hose (5) with clear plastic tubing.
Loosen drain plug (6) in order to drain the oil.
Drain the oil into a suitable container.
After the oil has been drained, tighten drain plug (7) to 110 15 N m (81 11 lb ft).
Remove the swivel hose.
Clean plug (4) and install the plug. Tighten the plug to a 75 5 N m (55 3.7 lb ft).
Open the access door on the right side of the machine.
Clean the pump, the hydraulic lines, and the hydraulic tank.
Illustration 8 g02144193
Remove plug (7) from the tube. Allow the oil to drain into a container.Note: Dispose of used filters and used fluids according to local regulations.
Inspect the O-ring. Replace the O-ring if wear or damage is evident.
Clean the plug. Install the plug and the O-ring into the drain port.
Illustration 9 g02022856
(8) Bolts
(9) Washers
(10) Cover
(11) Spring
(12) Screen
Remove bolts (8), washers (9), and cover (10).Note: Dispose of used filters and used fluids according to local regulations.Note: Do not allow spring (11) to fall back into the tank.
Remove spring (11) and screen (12).Note: Refer to Operation and Maintenance Manual, "General Hazard Information" for information on containing fluid spillage.
Wash the screen in a clean nonflammable solvent. Allow the screen to dry. Inspect the screen. Replace the screen, if the screen is damaged.
Illustration 10 g02022857
(13) O-ring seal
(14) O-ring seal
Remove O-ring seal (13) from the screen.
Inspect O-ring seals (13) and (14). Replace the O-ring seals if wear or damage is evident.
Install O-ring seal (13) on screen (12).
Install screen (12) and spring (11). Then install cover (10), washers (9), and bolts (8).Note: Make sure that the O-ring seals and the spring are properly positioned during installation.
Fill the hydraulic system oil tank. Refer to Operation and Maintenance Manual, "Capacities (Refill)".
Inspect the O-ring seal on the filler cap for damage. Replace the O-ring, if necessary. Clean the filler cap. Install the filler cap.
When the main hydraulic pump has been serviced or the hydraulic oil has been replaced, the air in the hydraulic system must be purged. Do not start the engine until the main hydraulic pump has been filled with oil.Operating the hydraulic pump without proper lubrication will damage the pump and other hydraulic components.
When the hydraulic oil has been replaced, the air must be removed from the hydraulic oil system. To remove the air from the hydraulic oil system, follow Step 29.a through Step 29.g.
Access the hydraulic pump. The hydraulic pump is located behind the right side access door.
Illustration 11 g06226748
Typical example
(15) Drain hose
(16) Connector
(17) Fitting
While the engine is stopped, remove drain hose (15) and connector (16) from the top of the pump. Add hydraulic