C-73
35 Series 4WD, Model - 3535, 4035, 4535 and 5035 SM June’08
Probable Cause Remedy
Engine Turns But Will Not Start
1. No fuel delivery to injection nozzles - - - - - - - - - Check fuel supply, air in system, plugged filter
elements and injection pump.
2. Intake or exhaust system clogged - - - - - - - - - - - Remove air flow restriction and clean exhaust
system. Service the air cleaner.
3. Improper adjustment on pump linkage
and controls - - - - - - - - - - - - - - - - - - - - - - - - - - - Readjust as necessary.
Poor Compression
1. Piston rings worn, broken or cracked - - - - - - - - Install new rings.
2. Cylinder sleeve worn - - - - - - - - - - - - - - - - - - - - - Install new sleeves.
3. Valves damaged or worn - - - - - - - - - - - - - - - - - Install new valves.
4. Broken valve spring - - - - - - - - - - - - - - - - - - - - - Install new springs.
5. Worn cylinder head gasket - - - - - - - - - - - - - - - - Install new gasket.
6. Valve seats worn or cracked - - - - - - - - - - - - - - - Grind valve seats. If cracked, install new valves.
7. Worn pistons - - - - - - - - - - - - - - - - - - - - - - - - - - Install new pistons.
8. Excessive valve guide wear - - - - - - - - - - - - - - - - Install new valve guides.
9. Sticking valves or bent valves stems - - - - - - - - - Free stem and correct cause. Replace valves with
bent stems.
10. Faulty valve action - - - - - - - - - - - - - - - - - - - - - - Adjust valve clearance.
Engine Overheats
1. Water pump air bound - - - - - - - - - - - - - - - - - - - Vent air from water pump and thermostat housing.
2. Insufficient coolant in cooling system - - - - - - - - Check level and add if necessary. Check hose
connections for leaks.
3. Dirt & trash on outside of Radiator - - - - - - - - - - Clean between the tube fins with air or water
pressure.
4. Cooling system clogged - - - - - - - - - - - - - - - - - - Drain and flush cooling system.
5. Hose connection leaking or collapsed - - - - - - - - Change hose.
6. Insufficient oil - - - - - - - - - - - - - - - - - - - - - - - - - Maintain proper oil level.
7. Engine oil diluted with fuel - - - - - - - - - - - - - - - Change oil. Inspect for loose fuel line connections
on the injection nozzles. Check for defective
injection pump.
8. Radiator cap not sealing or defective - - - - - - - - Replace
9. Defective thermostat - - - - - - - - - - - - - - - - - - - - Remove and test thermostat. Replace if necessary.
10. Water pump defective - - - - - - - - - - - - - - - - - - - Repair pump.
11. Clogged oil filter - - - - - - - - - - - - - - - - - - - - - - - Replace oil filter element.
12. Fan belt slipping - - - - - - - - - - - - - - - - - - - - - - - - Adjust belt tension.
13. Engine overloaded - - - - - - - - - - - - - - - - - - - - - - Reduce load.
14. Cylinder head gasket/leaking - - - - - - - - - - - - - - - Install new head gasket properly using sealing
compound.
Trouble Shooting