ROD AS-HYD-YM 4935536 - Caterpillar

1. Check the oil levels of the transmission, flywheel clutch and bevel gear case.2. Check the oil level in the final drives.3. Check all oil lines, hoses and connections for leaks and damage. Look for oil on the ground under the machine.4. Check the control linkages for the flywheel clutch, transmission, steering clutches and brakes for damage and/or adjustment.5. With the flywheel clutch not engaged, turn the universal joint by hand. It must turn freely. If the oil is cold, the universal joint will be harder to turn. If the universal joint loes not turn, disconnect it from the flywheel clutch. Turn the universal joint again and see if the gears in the transmission turn.6. Let the oil out of the filter housing. Remove and check the filter element for foreign materials. Check the magnetic screen and the screen in the bottom of the engine flywheel housing.a. Bronze-colored particles give and indication of a clutch failure.b. Shiny steel particles give the indication of a pump failure.c. Rubber particles give an indication of a seal or hose failure.If you find metal or rubber particles, all components of the transmission hydraulic system must be washed clean. Do not use parts with damage. Use new parts.7. Check the adjustment of the track.Operation Checks
When checks are made while the machine is in operation, make sure only one operator is on the machine. Keep other personnel away from the machine. Make sure checks are done in a flat open area.
With the engine running, move the transmission selection lever to all speed positions and the control lever for the flywheel clutch to all positions.Operate the machine in each direction and in all speeds. Make note of all noises that are not normal and find their sources. If the operation is not correct, make reference to the Troubleshooting for "problems" and "probable causes".Troubleshooting
Problem Checklist
Transmission Problem List:
1. Transmission does not operate in any speed or does not engage (slips) in all speeds.2. Transmission does not make a shift.3. Slow Shifts.4. Transmission does not remain in a speed when under load conditions.5. Shifts of the transmission are not easy.6. Gears in the transmission do not turn.7. Transmission is in a speed when the control lever is in NEUTRAL.8. Transmission gets hot.9. Pump noise not normal.Steering System Problem List:
1. Machine will not turn in one direction.2. Machine will not turn in either direction.3. Machine moves in either direction when both steering clutches are engaged.4. Slow steering.Transmission:
Problem 1: Transmission does not operate in any speed or does not engage (slips) in all speeds.
Probable Cause:1. Low oil pressure caused by:a. Low oil level.b. Control linkage loose or adjustment not correct.c. Failure of the oil pump or the pump drive.d. Air leaks on inlet side of pump.e. Leakage inside the transmission.2. Mechanical failure in transmission.3. Failure in flywheel clutch.4. Transfer gear, bevel pinion and/or bevel gear failure.5. Failure in steering clutches.6. Failure in final drives.Problem 2: Transmission does not make a shift.
Probable Cause:1. Control linkage loose or adjustment not correct.2. Low