Arctic Cat 700 Diesel ATV 2007 Service Manual page 101

Troubleshooting
Problem: Engine will not start or is hard to start (White smoke present)
Condition
1. Glow plugs not heating
2. Glow plug heating insufficient
Problem: Engine will not start or is hard to start - smoke present (Compression too low)
Condition
1. Valve clearance out of adjustment
2. Valve guides worn - seated poorly
3. Valves mistimed
4. Piston rings worn excessively
5. Cylinder bore worn
6. Starter motor cranks too slowly - does not turn
Problem: Engine will not start or is hard to start - smoke not present (No fuel reaching the fuel injector)
Condition
1. Fuel tank vent hose obstructed
2. Fuel hose obstructed
3. Fuel filter obstructed
4. Fuel pump defective
5. Fuel solenoid valve not opening
Problem: Engine stalls easily
Condition
1. Valve clearance out of adjustment
Problem: Engine noisy (Excessive valve chatter)
Condition
1. Valve clearance too large
2. Valve spring(s) weak - broken
3. Rocker arm - rocker arm shaft worn
4. Camshaft worn
5. Cam followers worn
Problem: Engine noisy (Noise seems to come from piston)
Condition
1. Piston - cylinder worn
2. Combustion chamber carbon buildup
3. Piston pin - piston pin bore worn
4. Piston rings - ring groove(s) worn
Problem: Engine noisy (Noise seems to come from crankshaft)
Condition
1. Bearings worn - burned
Back
3-78
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Remedy
1. Check and troubleshoot glow plugs
2. Recycle glow plugs
Remedy
1. Adjust clearance
2. Repair - replace guides
3. Adjust valve timing
4. Replace rings
5. Replace - rebore cylinder
6. See Section 5 - Troubleshooting
Remedy
1. Clean vent hose
2. Clean - replace hose
3. Replace fuel filter
4. Replace fuel pump
5. See Section 5 - Fuel Solenoid
Remedy
1. Adjust clearance
Remedy
1. Adjust clearance
2. Replace spring(s)
3. Replace arm - shaft
4. Replace camshaft
5. Replace cam followers
Remedy
1. Replace - service piston - cylinder
2. Clean chamber
3. Replace - service pin - bore
4. Replace rings - piston
Remedy
1. Replace bearings and/or crankshaft
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