TM 9-4520-260-13
Table 4-1. Unit Preventive Maintenance Checks and Services
NOTE
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
Item
Interval
Checked or
Procedure
Not Fully Mission
No.
Serviced
capable If:
Components on
1
Quarterly
Control Panel
Check that the ON-OFF switch and RESET switch are
control panel
operational. Check if fuse is good. Inspect
are not
POWER and THERMO connectors for serviceability
operational.
and proper connections.
2
Quarterly
Rain Shield
Check that rain shield is properly mounted and has no
Air inlet is
obstructions to air inlet.
obstructed.
3
Quarterly
Fuel Strainer
Check for dents, cracks, or leaks. Service fuel strainer
Strainer leaks.
Fuel pump leaks,
4
Quarterly
Fuel Pump
Check for loose mounting leaks, and faulty operation.
is damaged, or
Check for cracks or damaged wires or connector.
does not
operate
properly.
Carburetor leaks
5
Quarterly
Carburetor
Check carburetor for leaks. Tighten loose connections
or cannot be
and fittings. Adjust per para 4-4. c. (6). If
adjusted.
carburetor requires replacement, refer heater to
Direct Support Maintenance.
6
Quarterly
Igniter
Check igniter cable for serviceability. Remove and
damaged or
igniter is
electrode or stripped threads. Replace if defective
unserviceable.
7
Quarterly
Glow Plug
Remove glow plug and check for broken heater
Glow plug is
element, cracked insulator, or damaged threads.
unserviceable.
4-8