NC SW6 Maintenance Instructions Manual page 53

CHART A3—Engine will not crank or cranks slowly
Cause
Starting electrical connections loose or
corroded.
Battery charge low.
No electrical connection to the starter
solenoid.
Crankshaft rotation restricted.
Solenoid or starter motor fault.
Starter motor operating but not cranking.
Fault Finding
Clean and tighten connections.
Check battery voltage, charge the battery or replace as required.
Make sure that the alternator is functioning correctly and charging
the battery.
Check voltage to solenoid.
Manually turn the engine and check for any severe rotational
resistance.
Replace starter motor.
Remove the starter motor and check for broken teeth on the ring
gear or broken starter motor spring.
Remedy
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