Table 4-2. Unit Troubleshooting-continued -706880219

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

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).

"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 oper tion.

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