California Air Tools 3010 Service Manual Page 502

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18-24 APPENDIX
Troubleshooting Guide
NOTE
This is not an exhaustive list, giving every
possible cause for each problem listed. It
is meant simply as a rough guide to assist
the troubleshooting for some of the more
common difficulties.
Engine Doesn’t Start, Starting Difficulty:
Starter motor not rotating:
Neutral switch trouble
Starter motor trouble
Battery voltage low
Relays not contacting or operating
Wiring open or shorted
Main switch trouble
Fuse blown
Starter motor rotating but engine doesn’t
turn over:
Starter motor trouble
Pinion or ring gear worn
Engine won’t turn over:
Valve seizure
Rocker arm seizure
Cylinder, piston seizure
Crankshaft seizure
Connecting rod small end seizure
Connecting rod big end s eizure
Camshaft seizure
No fuel flow:
No fuel in tank
Fuel tank air vent obstructed
Fuel injection pump trouble
Fuel filter clogged
Fuel line clogged
Compression low:
Fuel injection nozzle l oose
Glow plug loose
Cylinder head not sufficiently tightened
down
No valve clearance
Cylinder, piston worn
Piston rings bad (worn, weak, broken, or
sticking)
Piston ring/groove clearance excessive
Cylinder head gasket damaged
Cylinder head warped
Valve spring broken or weak
Valve not seating properly (valve bent,
worn, or carbon accumulation on the
seating surface)
Poor Running at Low Speed:
Fuel/air mixture incorrect:
Air cleaner clogged, poorly sealed, or miss-
ing
Fuel tank air vent obstructed
Fuel injection pump trouble
Compression low:
Fuel injection nozzle loose
Glow plug loose
Cylinder head not sufficiently tightened
down
No valve clearance
Cylinder, piston w orn
Piston ring bad (worn, weak, broken, or
sticking)
Piston ring/groove clearance excessive
Cylinder head gasket damaged
Cylinder head warped
Valve spring broken or weak
Valve not seating properly (valve bent,
worn, or carbon accumulation on the
seating surface)
Other:
Engine oil viscosity too high
Front final gear case oil viscosity too high
Drive train trouble
Brake dragging
Poor Running or No Power at High Speed:
Fuel/air mixture incorrect:
Air c leaner clogged, poorly sealed, or miss-
ing
Fuel tank air vent obstructed
Fuel line clogged
Fuel injection pump trouble
Compression low:
Fuel injection nozzle loose
Glow plug loose
Cylinder head not sufficiently tightened
down
No valve clearance
Cylinder, piston w orn
Piston ring bad (worn, weak, broken, or
sticking)
Piston ring/groove clearance excessive
Cylinder head gasket damaged
Cylinder head warped
Valve spring broken or weak
Valve not seating properly (valve bent,
worn, or carbon accumulation on the
seating surface)
Knocking:
Carbon built up in combustion chamber
Fuel poor quality or incorrect
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