Table 3-1. Operator Troubleshooting Chart - continued

TM 5-4210-224-14&P

Table 3-1. Operator Troubleshooting Chart (Continued).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

6. ENGINE SPEEDS TOO HIGH FOR REQUIRED FIRE PUMP CAPACITY OR PRESSURE.

Check for transmission in wrong range.

Repeat recommended shifting procedure (paragraph 2-9).

7. PRESSURE RELIEF VALVE DOES NOT RELIEVE PRESSURE WHEN VALVES ARE CLOSED.

Step 1. Check if control valve is set incorrectly.

Repeat procedures for setting relief valve (paragraph 2-18).

Step 2. Check if relief valve is inoperative.

Refer to next higher level of maintenance.

8. UNABLE TO ATTAIN PROPER SETTING ON PRESSURE RELIEF VALVE.

Check if correct setting procedures have been followed.

Repeat procedures for setting relief valve (paragraph 2-18).

9. WATER PRESSURE IS TOO HIGH OR TOO LOW.

Check if pressure relief valve is set too high.

Adjust pressure relief valve.

ENGINE COOLING SYSTEM

10. ENGINE OVERHEATING.

Step 1. Inspect for loose or missing fan belt.

Refer to next higher level of maintenance.

Step 2. Inspect coolant level.

Refer to next higher level of maintenance for service.

ENGINE FUEL SYSTEM

11. ENGINE WILL NOT START.

Check for low fuel supply.

Replenish fuel supply as necessary.

12. UNEVEN RUNNING AND/OR FREQUENT STALLING.

Check for low fuel supply.

Replenish fuel supply as necessary.

ENGINE AND ACCESSORIES

13. NO BATTERY VOLTAGE.

Inspect battery cables for cracks, fraying and looseness.

Refer to next higher level of maintenance for replacement.

3-5