BODY AS-PISTON 7N3633 - Caterpillar

Introduction
This section provides the following information:
Known problems
Probable causes of known problems
Repairs in order to correct known problemsAdditional repair work maybe needed beyond the recommendation in the list.A problem is not normally caused by only one part. The cause can be related to problems with other parts. This list does not include all possible problems and corrections. The service technician must find the problem and the problem's source. After the problem's source is determined, the service technician can make the necessary repairs.Troubleshooting Problems
Engine Crankshaft Will Not Turn
Probable Cause
Problem with the air starting motorRefer to the information on the air starting motor in this section.
Fluid in the cylindersOpen the manual valves (Kiene valves) on each cylinder. If the engine is not equipped with the manual valves, remove the cylinder pressure relief valve or the plug. Inspect the cylinders for fluid while the crankshaft is being turned.
Problem with accessory equipment (hydraulic pumps, air compressor, etc)Disconnect the driven equipment until the faulty accessory can be found. Repair the faulty accessory. Replace the faulty accessory.
An internal problem prevents the turning of the engine crankshaft.If the crankshaft cannot be turned, the engine must be disassembled. After disassembling the engine, inspect the engine for other internal problems. Possible internal problems include the following conditions:
Bearing seizure
Piston seizure
Valve and piston contactThe Engine Will Not Start. The Governor Terminal Shaft Does Not Move.
Probable Cause
Control linkage bindsThe engine can start when the engine is cold. When the oil is hot the governor does not develop the oil pressure that is needed to move the linkage. Check the linkage effort and correct the linkage effort.
No signal to actuator solenoidRefer to the Woodward PGEV & PGE Locomotive Governors, SENR6444 or to the 2301A Electric Governors For Generator Sets, SENR3585.
Low oil pressure in the governorThe governor oil pump relief valve may be stuck in the open position or the valve may be leaking. This may be corrected by disassembly and cleaning of the governor. Refer to Caterpillar 3161 Governor, SENR3028. Check for plugged oil supply passages from the engine. The Engine Will Not Start. The Governor Terminal Shaft Moves.
Probable Cause
Slow cranking speedRefer to "Air Starting Motor Turns Slowly or the Air Starting Motor has a Loss of Power".
Low quality fuel or water in fuelRemove the fuel from the fuel tank. Install new fuel filters. Put a good grade of clean fuel in the fuel tank. Refer to Supplement, SEBU7003, "Caterpillar 3600 Series Diesel Engine Fluids Recommendations For Lubricants, Fuels, and Coolants".
No fuel to fuel injectorsCheck the fuel level in the fuel tank and fill the fuel tank, if necessary. Use the priming pump in order to remove any air from the fuel system.Install new fuel filters, if necessary. Fuel lines that are blocked should be cleaned and fuel lines that are broken should be replaced. Check the fuel transfer pump for damage and/or wear.The governor linkage is not connected to the internal rack linkage. This condition can exist after a governor has been assembled incorrectly during an overhaul. Ensure that the governor