SHAFT-AXLE 9U2789 - Caterpillar

The engine coolant is too hot.
Probable Cause
The air flow through the radiator is restricted. Clean the exterior of the radiator in order to remove all restrictions.
The coolant level in the engine is low. Add coolant into the radiator to the correct level.
The pressure cap is faulty. Test the operation of the pressure cap. Replace a faulty pressure cap.
Gases from combustion are in the coolant. Find the source of the entry of the gases from combustion into the coolant system. Repair the source of the problem.
The water temperature regulator is faulty. Test the water temperature regulator for correct operation. Replace a faulty water temperature regulator.
The water pump is faulty. The water pump must be repaired or replaced.
The engine is operating with too much load. Reduce the load.
The timing of fuel injection pump is incorrect. Adjust the timing.The exhaust temperature is too high.
Probable Cause
A restriction exists in the air inlet or the exhaust system. Remove the restriction.
The timing of the fuel injection pump is incorrect. Adjust the timing of the fuel injection pump.The starting motor does not turn or the starting motor slowly turns.
Probable Cause
The battery is discharged. Charge the battery. Replace a faulty battery. Clean all cable terminals and battery posts. Apply the 1U-8267 Battery Saver and Cleaner on the cable clamps and the battery posts. Tighten the cable clamps on the battery posts.
The terminals or the brushes of the starting motor have a short circuit to ground. Find the short circuit. Repair the short circuit.
The brushes of the starting motor do not seat against the commutator correctly. The brushes are worn, broken, oily or dirty. The brushes must be cleaned or replaced. Clean the brush holders.
The ignition switch, the starting motor solenoid, or the start relay is damaged. Replace the ignition switch, the starting motor solenoid, or the start relay.
An excessive voltage drop exists in the cables or across the terminals in the circuits for the starting motor. The cables are loose at the terminals, corroded, or cracked. The terminals are corroded or broken. Inspect the cables and terminals for loose connections, corrosion or other damage.The starting motor turns, but the pinion gear does not engage the flywheel ring gear.
Probable Cause
The pinion drive or the overrunning clutch