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Page Title: Table 4-2. Unit Troubleshooting-continued
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TM 5-4210-233-14&P-1
Table 4-2.
Unit Troubleshooting-Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
HYDRAULIC SYSTEM-Continued
25
PUMP NOISE (ACCOMPANIED BY OIL FOAMING IN RESERVOIR)
Air entering at suction manifold.
Check all lines for security, manifold for cracks and proper attachment. Tighten, repair, or
replace components as necessary (see para 4-9).
26
HYDRAULIC RESERVOIR OVERFLOWING
Aerial ladder was lowered without hydraulic pressure applied and air entered the lift cylinders
Raise and lower ladder several times to purge air from the lift cylinders and service hydraulic
reservoir
ELECTRICAL SYSTEM-IGNITION CIRCUITS
(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 2, 3, 5, and 6 of 16)
1
"BATTERY SWITCH" LIGHT DOES NOT ILLUMINATE
(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 2 of 16).
Step 1. Check bulb.
Replace bulb.
Step 2. Check battery switch for proper operation.
Replace switch (see para 4-101).
Step 3.
Check for +12V at circuit breaker #9 on battery accessory buss.
Replace breaker.
Step 4. Refer to "+12 volts not present at battery accessory buss" troubleshooting procedures.
Step 5. Check wiring for continuity.
Replace wire (see para 4-9).
4-69

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