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Page Title:
TABLE 5-1. SERVICE TROUBLES AND REMEDIES |
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 TM 10-3930-623-12
TABLE 5-1. SERVICE TROUBLES AND REMEDIES
Trouble
Probable Cause
Remedy
ENGINE
Defective battery
Replace or charge
ENGINE WILL NOT
TURN WHEN
Loose terminals
Clean and tighten
STARTER BUTTON
IS PRESSED
Damaged or defective cables
Replace cables
Defective starter solenoid switch
Replace switch
Defective starting motor
Replace starting motor
Incorrect oil viscosity (cold
Drain and refill with proper grade
weather)
for temperature
Mechanical seizure of parts
Replace parts
Defective neutral safety switch
Replace switch
(Group C Trucks)
Stripped starting motor drive
Replace starting motor
ENGINE WILL NOT
TURN, STARTING
Stripped flywheel ring gear
Replace flywheel ring gear
MOTOR TURNS
Starting operation overlooked
See starting instructions
ENGINE TURNS BUT
WILL NOT START
Defective coil
Replace coil
Defective condenser
Replace condenser
Defective points
Replace points
Defective rotor
Replace rotor
Ignition switch
Replace or repair switch
Defective spark plugs
Replace spark plugs
Defective spark plug cables
Replace cables
Weak battery
Replace or charge
Damaged battery cables
Replace cables
Loose or corroded battery terminals
Clean and tighten
or connections
Loose connections on ignition switch
Clean and tighten
Improper distributor timing
Time distributor
Improper valve timing
Retime valves
Plugged fuel line
Disconnect and clean
5-16
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