1. Refer to items 2, 3, and 5 and perform the operations listed.
2. Replace the starting motor switch.
3. Hand crank the engine at least one complete revolution. If the engine cannot be rotated a complete revolu-
tion, internal damage is indicated and the engine must be disassembled to ascertain the extent of damage and
4. Refer to Lubricating Oil Specifications in Fuel and Oil Specifications for the recommended grade of oil.
5. Recharge the battery if a light load test indicates low or no voltage. Replace the battery if it is damaged or
will not hold a charge.
Replace terminals that are damaged or corroded.
At low ambient temperatures, use of a starting aid will keep the battery fully charged by reducing the cranking
6. Tighten the starter connections. Inspect the starter commutator and brushes for wear. Replace the brushes
if badly worn and overhaul the starting motor if the commutator is damaged.
7. To check for air leaks, flow obstruction, faulty fuel pump or faulty installation, consult the No Fuel or
Insufficient Fuel chart. Check for bind in the governor-to-injector linkage. Readjust the governor and injector
controls if necessary.
9. Remove the cylinder head and recondition the exhaust valves.
10. Remove the air box covers and inspect the compression rings through the ports in the cylinder liners.
Overhaul the cylinder assemblies if the rings are badly worn or broken.
11. To check for compression gasket leakage, remove the coolant filler cap and operate the engine. A steady
flow of gases from the coolant filler indicates either a cylinder head gasket is damaged or the cylinder head is
cracked. Remove the cylinder head and replace the gaskets or cylinder head.
12. Adjust the exhaust valve clearance.
13. Remove the flywheel housing cover at the blower drive support. Then remove the snapring and withdraw
the blower drive shaft from the blower. Inspect the blower drive shaft and drive coupling. Replace the
damaged parts. Bar the engine over. If the blower does not rotate, remove the air inlet adaptor and visually
inspect the blower rotors and end plates. If visual distress is noted, remove the blower (refer to Blower).
14. Operate the starting aid according to the instructions under Cold Weather Starting Aids.