TUBE ASSEM. (oil supply) 6N6122 - Caterpillar

Illustration 1 g00808189
Clean the area in order to keep dirt out of the filter base.
Illustration 2 g00808058
Slowly loosen the vent plug that is on top of the filter in order to release the pressure from the filter. Tighten the vent plug.
Remove the used case drain filter from the filter base.Note: This element is a cartridge type filter. The element cannot be reused.Note: Dispose of used filters according to local regulations.
Clean the filter base.
Illustration 3 g00101502
Coat the seal of a new case drain filter with clean hydraulic oil. Install the new case drain filter in the filter base. Tighten the case drain filter hand tight.
After replacing any hydraulic filter, the air must be purged from each filter. Perform Step 7.a through Step 7.c in order to purge the air from the hydraulic system.
Start the engine.
Slowly loosen the vent plug on top of the filter until oil flows out of the vent plug.
Tighten the vent plug.
Drive the machine slowly for 10 to 15 minutes. Move each cylinder evenly through several cycles.
Illustration 4 g00101435
Return the machine to the servicing position. Check the machine for oil leaks.
Stop the engine.
Illustration 5 g00808061
(A) High temperature range (B) Low temperature range
Maintain the oil level in the low temperature range for a cold machine. Maintain the oil level in the high temperature range for a machine that is at a normal operating temperature.
Illustration 6 g00837210
Slowly loosen the fill/vent plug in order to relieve any pressure. Remove the fill/vent plug in order to add oil, if necessary.
Clean the fill/vent plug. Install the fill/vent plug.