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TROUBLESHOOTING
ENGINE SYMPTOM DIAGNOSIS
FOR MACK ASET™ ENGINES
V-MAC III Diagnostics
When operating in cold weather, fuel waxing can
cause many of the problems described below.
Also, water in the fuel can damage unit pumps
and nozzles. Be sure to check for water in the fuel
and/or fuel congealing before proceeding to
troubleshoot a problem.
Also refer to the V-MAC III Service Manual,
8-211, for applicable blink code information.
ENGINE WILL NOT CRANK
Possible Cause Correction
1. Batteries have low output. 1. Check the batteries. Charge or replace as required.
2. Loose or corroded battery or ground connections. 2. Clean and tighten battery and ground connections.
3. Broken or corroded wires. 3. Check voltage at the following connections:
— Switch to starter
— Battery to starter
Replace as required.
4. Faulty starter or starter solenoid. 4. Check operation of starter and solenoid. Repair as required.
5. Faulty key switch. 5. Replace key switch.
6. Internal seizure. 6. Bar the engine over one complete revolution. If the engine cannot
be turned, internal damage is indicated. Disassemble engine and
repair as required.
5-111.bk Page 88 Monday, July 10, 2006 2:26 PM
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