Table 4-1. Unit Preventive Maintenance Checks and Services
If the equipment must be kept in continuous operation, do only the procedures that
can be done without disturbing operation. Make complete checks and services
when the equipment is shut down.
Item To Be
Not Fully Mission
Check that the ON-OFF switch and RESET switch are
operational. Check if fuse is good. Inspect
POWER and THERMO connectors for serviceability
and proper connections.
Check that rain shield is properly mounted and has no
Air inlet is
obstructions to air inlet.
Check for dents, cracks, or leaks. Service fuel strainer
Fuel pump leaks,
Check for loose mounting leaks, and faulty operation.
is damaged, or
Check for cracks or damaged wires or connector.
Check carburetor for leaks. Tighten loose connections
or cannot be
and fittings. Adjust per para 4-4. c. (6). If
carburetor requires replacement, refer heater to
Direct Support Maintenance.
Check igniter cable for serviceability. Remove and
electrode or stripped threads. Replace if defective
Remove glow plug and check for broken heater
Glow plug is
element, cracked insulator, or damaged threads.