RETAINER-RING 4364966 - Caterpillar

Daily
Visually inspect the front and rear suspension cylinders for leaking oil. If leaking oil is present, remove the cylinder and repair the leak. Repair the cylinder or replace the cylinder as soon as possible.
Illustration 1 g01219112
Suspension cylinder
(1) Relief valve
(2) Plug
(3) FittingVisually inspect the front and rear suspension cylinders for any unusual conditions that might affect the operation of the cylinder or the ride of the truck. The following conditions can affect performance:
collapsed cylinder
excessive rod extension
damage to the chrome on the cylinder rodGrease that is forced into the cavity that is inside the cylinder at Location (A) will limit the travel of the cylinder rod. If the travel of the cylinder rod is limited, the ride of the truck can become rough.If reduced travel of the cylinder rod is found, repair the cylinder or replace the cylinder as soon as possible.Note: Do not attempt to remove the relief valves (1), plug (2), or fitting (3) when there is pressure in the cylinder.Every 500 Service Hours or 3 Months
Stop the machine gradually on a level surface without any sudden application of the brakes.
Prepare the machine for maintenance. Refer to Operation and Maintenance Manual, "Prepare the Machine for Maintenance".
Illustration 2 g01273811
Right front suspension cylinder
(X) Distance of exposed chrome
Measure distance of exposed finished surface (X) for the front suspension cylinders. Compare the present distance to the distance from the previous time. If those dimensions are not available, check the charge pressure.
If necessary, perform the charging procedure on the front suspension cylinders.
Illustration 3 g01273813
Right rear suspension cylinder
(Y) Distance between the pins
Measure distance between the pins (Y) for the rear suspension cylinders. Compare the present distance to the distance from the previous time. If those dimensions are not available, check the charge pressure.
If necessary, perform the charging procedure on the front suspension cylinders.Refer to System Operation, Testing and Adjusting, UENR1122, "770G, 772G Off-Highway Truck Systems" for any information concerning suspension cylinders. UENR1122 includes tooling, pressures, and the correct procedures for purging (oil and nitrogen) and charging (oil and nitrogen), that are used on the suspension cylinders.Every Year
Purge the nitrogen charge from the suspension cylinders. Refer to the procedure to purge suspension cylinders in Special Instruction, REHS4445, "Servicing the Suspension Cylinders for Off-Highway Trucks".Replace the relief valves on the front suspension cylinder and make sure that all the grease ports are clear.Recharge the suspension cylinders with nitrogen charge. Refer to the procedure to recharge the suspension cylinders in Special Instruction, REHS4445, "Servicing the Suspension Cylinders for Off-Highway Trucks".