Table 4-2. Unit Troubleshooting-continued -706880250

TM 5-4210-233-14&P-1

Table 4-2. Unit Troubleshooting - Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

ELECTRICAL SYSTEM - PUMP PANEL - Continued

OUTRIGGER ALARM DOES NOT SOUND WHEN OUTRIGGERS STOWED AND DIVERTER

VALVE IS SWITCHED TO OUTRIGGER POSITION

(Refer to Electrical Wiring Diagrams, Appendix H, Sheet 7 of 16.)

Step 1. Check that "outrigger" light is illuminated.

If light is not illuminated, refer to diverter valve test procedure.

If light is illuminated, go on to Step 2.

Step 2. Check alarm for 12 volts across terminals.

If 12 volts is present at alarm, replace alarm.

If 12 volts is not present at alarm, go on to Step 3.

Step 3. With all power off, check contacts of outrigger and alarm interlock relays for continuity

(3, 9 left ply, 1, 7 right ply.)

Replace relay (see para 4-9.4).

Step 4. Check for +1 2V at aerial circuit breaker #2.

Replace breaker (see para 4-99).

Step 5. Check outrigger down limit switches by testing for +12 signal on wire #2389 when

engaged (outrigger down).

Replace limit switch (see para 4-196).

Step 6. Check front left outrigger down and front right outrigger down relays. Left - Continuity

between #1233 and wire #1249 when coil is energized. Right - continuity between wire

#1248 and #1228 when coil is energized.

Replace relay (see para 4-9.4).

4-121