RING-RETAINING 3678629 - Caterpillar

Sudden movement of the machine or release of oil under pressure can cause injury to persons on or near the machine.To prevent possible injury, perform the procedure that follows before testing and adjusting the power train.
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Escaping fluid under pressure, even a pinhole size leak, can penetrate body tissue, causing serious injury, and possible death. If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury.Always use a board or cardboard when checking for a leak.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Move the machine to a smooth, horizontal location that is away from operating machines and away from personnel.Note: Permit only one operator on the machine. Keep all other personnel away from the machine or in the operator's sight.
Place the transmission direction and speed control in the NEUTRAL position and in any speed position (if equipped). Place the transmission direction control switch in the NEUTRAL position (if equipped).
Engage the parking brake. Place wheel blocks in front of the wheels and behind the wheels.
Lower the bucket or the attachments to the ground.
Stop the engine.
Install the steering frame lock.
Move the control levers through the full range of travel. This will relieve any pressure that may be present in the implement hydraulic system.
Depress the brake pedal repeatedly. This will relieve any pressure that may be present in the brake hydraulic system.
Depress the breaker relief valve on the hydraulic tank in order to release the hydraulic oil pressure.
The pressure in the hydraulic system has been released. Lines and components can be removed.Troubleshooting can be complex. A list of some of the possible problems and corrections are on the following pages.This list of possible problems and possible corrections will only provide an indication of the location of a problem and the repairs that are required. Remember that a problem is not necessarily caused by one part, but by the relation of one part with other parts. This list can not provide all possible problems and corrections. Service personnel must find the problem and the source of the problem. Then, complete the necessary repairs.Perform