ELBOW 0008715 - Caterpillar

When you are troubleshooting a problem, a visual inspection of the system is the first step. Turn the engine OFF before you inspect the machine. Lower the implements to the ground. Place all controls in the PARK or HOLD position. After performing the visual inspection, check the operation of the machine and note any unusual noises.
Check the power train oil level.
Use the dipstick in order to check the power train oil level.ReferenceRefer to the Operation and Maintenance Manual, "Transmission Oil Level - Check".Expected Results
The oil level is between the "ADD" mark and the "FULL" mark.Results
OKAY: Proceed to Step 2.
NOT OKAY: Add oil if the oil level is low. Drain oil if the oil level is high. Maintain the level of the oil between the "ADD" mark on the dipstick and the"FULL" mark on the dipstick. Check the machine for the original problem. If the conditions are not resolved, proceed to Step 2.
Check the level of the final drive oil.
Position one final drive so that the oil level mark is horizontal.
Remove the check/fill plug at the final drive.
Use the final drive oil level mark to check the level of the final drive oil.
Repeat the procedure in order to check the final drive oil level for the other side of the machine. ReferenceRefer to the Operation and Maintenance Manual, "Final Drive Oil Level - Check".Expected Results
The oil level is at the bottom of the filler plug opening.Results
OKAY: Proceed to Step 3.
NOT OKAY: Add oil if the level of the oil is low. Drain oil if the level of the oil is high. Inspect the seal that is used for the check/fill plug. Replace the seal if the seal is damaged. Clean the plug and install the check/fill plug. Check the machine for the original problem. If the conditions are not resolved, proceed to Step 3.
Check for oil leaks.
Inspect these components for leaks and for damage: oil lines, hoses and fittings.
Look under the machine for oil that has leaked from the machine onto the ground.Expected Results
No leaks exist.Results
OKAY: Proceed to Step 4.
NOT OKAY: Repair all leaks. Check the machine for the original problem. If the conditions are not resolved, proceed to Step 4.
Check the electrical system.
Inspect the wires and check the electrical connectors to the transmission and to the brake control valves.ReferenceRefer to Service Manual, RENR9867, "Machine Electronic Control System".ReferenceRefer to the Schematic for the electrical system in the