Troubleshooting

i06223545
Engine Does Not Crank
Probable Causes
• Battery cables and batteries
• Switches and/or circuit breakers
• Safety interlock on the application
• Starting motor solenoid or starting circuit
• Starting motor and/or flywheel ring gear
• Engine accessories and transmission
• Hydraulic lock
Recommended Repairs
Complete the procedure in the order in which the
steps are listed.
Table 25
Troubleshooting Test Steps
Values Results
1. Battery Cables and Batteries
A. Inspect the main power switch, battery posts, and battery ca-
bles for loose connections and for corrosion. If the battery ca-
bles are corroded, remove the battery cables and clean the
battery cables. Tighten any loose connections.
B. Inspect the batteries.
C. Charge the batteries.
Test the batteries. Refer to Systems Operation, Testing and Ad-
justing, “Battery - Test ”.
Batteries and
cables
Result: The batteries and cables are not OK.
Repair: Make the necessary repairs.
Result: The batteries and cables are OK.
Proceed to Test Step 2.
2. Switches and/or Circuit Breakers
A. Check any switches and/or circuit breakers that may inter-
fere with the engine cranking. Refer to the applications electri-
cal schematic for additional information.
Switches and/or
circuit breakers
Result: The switches and/or circuit breakers are not OK.
Repair: Make the necessary repairs.
Result: The switches and/or circuit breakers are OK.
Proceed to Test Step 3.
(continued)
UENR0612-07 63
Symptom Troubleshooting
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