TM 5-4520-256-14
3-13.
CONTROL PANEL MAINTENANCE.
Maintenance of the control panel is limited to the repair of the panel by replacement of components at the unit level.
These items are covered as follows:
Item
Paragraph No.
OFF/VENT/HEAT Switch (S 1)................................................ 3-14
Fuel Pressure Gage................................................................ 3-15
Hour Meter.............................................................................. 3-16
Safety Relay (K8).................................................................... 3-17
Audible Alarm (EM 1) .............................................................. 3-18
Circuit Breaker (CB 1) ............................................................. 3-19
ON/OFF Toggle Switch (S7) ................................................... 3-20
Rectifier .................................................................................. 3-21
INTERNAL TANK/EXTERNAL TANK Selector........................ 3-22
3-14.
OFF/VENT/HEAT SWITCH (S1) MAINTENANCE.
This task covers:
a.
Removal
b.
Inspection
c.
Cleaning
d.
Repair
e.
Installation
INITIAL SETUP:
Tools Required:
Tool Kit, General Mechanics
Multimeter
Materials Required:
Cleaning solvent (Item 11, Appendix E)
WARNING
Cleaning solvent, Federal specification P-D-680, is toxic and flammable. Use only in a well-
ventilated area. Avoid prolonged breathing of fumes. Keep solvent away from flames. Do not
use in excessive amounts. Avoid skin contact.
Equipment Conditions:
Heater unit shut down and cool.
Power cable disconnected from power source.
Access door removed (para 3-10a).
a.
Removal.
(1)
Tag and disconnect all leads from rear of switch (5).
Change 3 3-30
