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TM10-3930-660-20
Table 2-3.
Mechanical Troubleshooting (Contd)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
l Under normal operating conditions, circuit breakers should never
require replacement. However, if a circuit breaker does not reset
after it has cooled, the circuit breaker is defective and must be
replaced, para. 8-12.
Check circuit for shorts, bad ground, or defective steering select
valve. Replace steering Select valve if necessary, para. 14-11. Refer
to the electrical schematic page FO-1.
Step 2. Check for broken wires, loose connections, and poor grounds.
Replace wires if necessary, para. 8-46 and 8-47. Tighten connections.
Step 3. Check for defective run relay.
Check that run relay closes, if not, replace run relay, para. 8-24.
Step 4. Check for defective steering select switch.
Check switch for continuity.
Replace switch if defective, para. 8-8.
Step 5. Check steering select valve.
Test steering select valve. Replace valve if defective, para. 14-11.
Step 6. Check blackout light switch.
Replace switch if defective, para. 8-14.
49.NO POWER TO ONE WHEEL
Step 1. Check for steering universal (Cardan) joint failure.
Inspect and replace steering universal joints if necessary, para. 14-9.
HYDRAULIC SYSTEM
50. HYDRAULIC FUNCTIONS OPERATE SLOWLY
Step 1. Cold hydraulic oil.
Operate hydraulic system until hydraulic oil warms up.
2-48
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