C-74
35 Series 4WD, Model - 3535, 4035, 4535 and 5035 SM June’08
Probable Cause Remedy
Engine Misses on One or More Cylinders
1. Insufficient air to engine- - - - - - - - - - - - - - - - - - Remove and clean air cleaner and air cleaner pipe.
2. Defective injection nozzles - - - - - - - - - - - - - - - - Replace with serviceable unit.
3. Air lock in the injection pump or fuel filter - - - - Vent air from system and check all fuel lines and
connections for leaks.
4. Poor fuel - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Use good grade of fuel.
5. Air leaks around intake manifold - - - - - - - - - - - Remove and install new manifold gasket.
6. Injection pump not operating properly - - - - - - - Remove injection pump and test it.
7. Injection pump not properly timed to
the engine - - - - - - - - - - - - - - - - - - - - - - - - - - - - Check and adjust timing if necessary.
Excessive Oil Consumption
1. Piston rings worn or broken - - - - - - - - - - - - - - - Install new rings.
2. Oil level in crankcase too high - - - - - - - - - - - - - Maintain proper oil level.
3. Crankcase oil pan gasket leaking - - - - - - - - - - - Install new gasket.
4. Worn valve guides - - - - - - - - - - - - - - - - - - - - - - Install new valve guides.
5. Cylinder sleeves worn - - - - - - - - - - - - - - - - - - - - Install new sleeves.
6. Front and rear crankshaft oil seal leaking - - - - - Install new oil seals.
7. Piston rings not seating - - - - - - - - - - - - - - - - - - Install new rings.
8. Clogged oil ring - - - - - - - - - - - - - - - - - - - - - - - - Remove and inspect and, if necessary, replace.
9. Oil pan drain plug loose or worn - - - - - - - - - - - Install new drain plug and gasket tighten plug.
10. Overheating - - - - - - - - - - - - - - - - - - - - - - - - - - - Refer to “Engine Overheats” on previous page.
11. Excessive oil poured into crankcase - - - - - - - - - - Drain oil and fill to correct level only.
12. Wrong specification oil used - - - - - - - - - - - - - - - Install oil meeting specifications in the operator’s
manual.
13. Air cleaner clogged - - - - - - - - - - - - - - - - - - - - - - Disassemble & clean air cleaner.
Engine Does Not Idle Properly
1. Injection Nozzle defective - - - - - - - - - - - - - - - - - Test Nozzle and repair and reset as per MICO.
2. Restriction to fuel delivery or leaking
fuel lines - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Inspect fuel lines and valves; inspect for proper level
in fuel tank.
3. Poor compression - - - - - - - - - - - - - - - - - - - - - - - See poor compression problems.
4. Slicking valves - - - - - - - - - - - - - - - - - - - - - - - - - See values sticking problem.
5. Improper adjustment of injection pump
linkage and controls - - - - - - - - - - - - - - - - - - - - - Readjust
4. Valve and spring assembly in operative - - - - - - - Repair and install parts needed.
Trouble Shooting
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