FIELD (UNIT) MAINTENANCE
LARGE CAPACITY FIELD HEATER (LCFH)
HEAT EXCHANGER EXHAUST TUBE
Tool Kit, General Mechanics (Item 2, WP 0092
MOS 52C or 63J
Heater shut down and cool.
Engine bay access door open.
Main battery switch OFF and handle removed.
1. Inspect the heat exchanger exhaust tube (1) to ensure that there is not extensive carbon buildup on
the inside surface.
2. Ensure that it is not dented or bent in such a way as to prevent a secure and leakproof connection
between the heat exchanger exhaust tube and the exhaust pipe port on the top of the heater.
3. Ensure that the top rain guard (2) is present and has not been damaged in such a way as to prevent
the proper flow of exhaust gases from the heat exchanger exhaust tube.
4. Ensure that the burn guard (3) is not bent or damaged and that it would adequately protect an
operator from coming in contact with a hot exhaust tube during operation.
Repair any dents or bends in the heat exchanger exhaust tube by tapping from the inside with a hammer
or other tool. If a dent prevents the proper flow of exhaust gases from the heater and the dent cannot be
properly repaired, the heat exchanger exhaust tube should be replaced.