GEAR & BEARING GP-SWING 3332984 - Caterpillar

Troubleshooting the Power Train
Problem: The transmission will not shift into any gear from the Neutral position
Probable Causes
Low Oil Level
Low battery voltage
Wiring harness connections
Transmission control (shifter or forward, neutral, reverse toggle switch)
Electrical problem with the clutch pedal
Main relief valve
Transmission oil pump
Rotating seal leakage in the transmission
Multiple ECPC valves are malfunctioning.
The parking brake system is malfunctioning.Problem: The transmission has lost a single gear
Probable Causes
The wiring harness for the transmission control
Transmission control (shifter or forward, neutral, reverse toggle switch)
Electronic control moduleProblem: The motor grader has lost multiple forward/reverse gear selections
Probable Causes
Torsional coupling failure
Wiring harness
The ECPC valve is malfunctioning.
Transmission control (shifter or forward, neutral, reverse toggle switch)
Electronic control module
Internal transmission problem
Active diagnostics on the Transmission ECM.Note: Before performing test procedures that involve running the engine, check the magnetic screens in the transmission for bolts or metallic debris; this could indicate a torsional coupling failure.Note: If the transmission will shift into First speed forward, Fifth speed forward, or First speed reverse, the parking brake may be engaged or there is an electrical fault in the parking brake system.Problem: The motor grader creeps when the clutch pedal is fully depressed
Probable Causes
Calibration for the clutch pedal
The ECPC valve requires calibration.
The ECPC valve is malfunctioning.
Wiring harness for the ECPC valve
Wiring harness for the transmission
Contamination
Driver in the electronic control module
Internal clutch dragProblem: When the transmission shifts a hesitation occurs
Probable Causes
The ECPC valve requires calibration.
The ECPC valve is malfunctioning.
Contamination in the transmission control valve
Oil temperature sensor
Drivers in the electronic control module
Speed sensors
Internal seal leakage on the transmission
Internal pump leakage
Main relief valve
Differential lock valve
Communication link between engine and transmission
The pump is causing aeration.Problem: The transmission shifts are harsh
Probable Causes
Transmission speed sensor
Wiring harness for the transmission speed sensor
Communication link between engine and transmission
Oil temperature sensor
The ECPC valve requires calibration.
The ECPC valve is malfunctioning.
Broken spring in the main relief valve
A spool in the main relief valve sticks.
The piston on a clutch sticks. Problem: The transmission shifts are sluggish
Probable Causes
Worn clutches
The ECPC valve requires calibration.
The ECPC valve is malfunctioning.
Slow clutch disengagement
The calibration of the proportional solenoid valve
The parking brake system is malfunctioning.Problem: The transmission shifts at the wrong point when the autoshift control is in the ON position
Probable Causes
Transmission intermediate speed sensor
Transmission input speed sensor
Transmission output speed sensor
The electronic control module has the wrong transmission configuration code.Problem: The transmission does not shift into all the gears when the autoshift is in the ON position
Probable Causes
Transmission intermediate speed sensor
Transmission input speed sensor
Transmission output speed sensor
The top gear limit is set.
The operator override is selected.Problem: The transmission shifts into the wrong gear when the autoshift is in the ON position
Probable Causes
Transmission intermediate speed sensor
Transmission input speed sensor
Transmission output speed sensor
The wiring harness for the ECPC valve is bad.
The wiring harness for the transmission ECM is bad.Troubleshooting the Parking Brake System
Problem: The parking brake does not hold the machine stationary.
Probable Causes
The brake linings for the parking brake are worn.
There is grease or oil on the brake lining.
The parking brake must be adjusted.Problem: The parking brake does not engage when the parking brake switch is actuated.
Probable