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TM 5-4210-233-14&P-1
Table 4-2.
Unit Troubleshooting-Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ELECTRICAL SYSTEM-CAB CONTROLS AND INDICATORS-Continued
25
AIR DRYER DOES NOT DRY COMPRESSOR AIR
Step 1.
Check dryer element for open.
Replace dryer element. Notify Direct Support.
Step 2.
Check for +12V at circuit breaker #2 on ignition accessory buss.
Replace breaker #2 (see para 4-99).
Step 3.
Check wiring for continuity.
Replace wire (see para 4-9).
26
"PUMP NOT IN GEAR" LIGHT DOES NOT ILLUMINATE
(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 3 of 16.)
Step 1.
Check bulb.
Replace bulb (see para 4-95).
Step 2.
Check pump shift linkage switch for proper operation.
Adjust/replace switch (see para 4-9.4).
Step 3.
Check cab pump shift switch for proper operation.
Replace switch (see para 4-94).
Step 4.
Check pump shift circuit breaker for +12V on both sides.
Replace breaker (see para 4-99).
Step 5.
Check wiring for continuity.
Replace wire (see para 4-9.4).
4-90
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