TM 9-4520-272-14&P
SUSTAINMENT (GENERAL) SUPPORT MAINTENANCE
LARGE CAPACITY FIELD HEATER (LCFH)
TROUBLESHOOTING PROCEDURES
INITIAL SETUP:
Tools
Personnel Required
Tool Kit, General Mechanics (Item 2, WP 0092
MOS 63J or 52C
Wrench, Torque (Item 12, WP 0092 00)
Materials/Parts
Equipment Condition
None required
Heater shut down and cool unless otherwise
indicated.
Main battery switch OFF and handle removed.
Table 1. Troubleshooting Procedure for Large Capacity Field Heater (LCFH).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. ENGINE WILL NOT START
Step 1. Check for defective injection
Step 1. Remove and replace
pump delivery valve (WP 0085 00).
pump delivery valve (WP 0086
Step 2. If engine cannot be
repaired, replace IAW WP 0078
2. ENGINE STARTS AND
Step 1. Check for defective injection
Step 1. Remove and replace
STOPS
pump delivery valve (WP 0085 00).
pump delivery valve (WP 0086
Step 2. Possible crankshaft bearing
Step 2. Remove and replace
seizure. Grasp flywheel and attempt
crankshaft bearing (WP 0085
to manually rotate engine in
clockwise direction to check for
seizure.
Step 3. Possible piston liner
Step 3. Remove and replace
seizure. Grasp flywheel and attempt
piston components (WP 0088
to manually rotate engine in
clockwise direction to check for
seizure.
Step 4. If engine cannot be
repaired, replace IAW WP 0078
3. ENGINE OUTPUT DROPS
Step 1. Check for defective injection
Step 1. Remove and replace
pump delivery valve (WP 0085 00).
pump delivery valve (WP 0086
Step 2. Check for carbon deposits
Step 2. Clean carbon from
in the engine combustion chamber
engine combustion chamber
0081 00-1
