ELBOW-EXHAUST 1400407 - 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.
Note: Permit only one operator on the machine. Keep all other personnel away from the machine or in the operator's sight.
Move the machine to a smooth, horizontal location that is away from operating machines and away from personnel.
Place the transmission direction and speed control in the NEUTRAL position and in any speed position.
Engage the parking brake. Place wheel blocks in front of the wheels and behind the wheels.
Lower the bucket or the work tools 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. The pressure in the hydraulic system has now been released. Lines and components can be removed.Troubleshooting can be complex, but many problems can be identified by performing a visual inspection first.Reference: For the proper procedure, refer to Troubleshooting, "Visual Inspection".If the visual checks are completed but the problem has not been identified, perform operational checks.Reference: For the proper procedure, refer to Testing and Adjusting, "Power Train Troubleshooting".Remember that a problem is not necessarily caused by one part, but by the relation of one part with other parts. Service personnel must find the problem and the source of the problem before the necessary repairs can be completed.