TM-9-2320-361-34
2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
MAY 1992
TM-9-2320-361-34 - Page 679 of 764
TM9-2320-361-34
17-15. PERSONNEL HEATER FLAME DETECTOR SWITCH MAINTENANCE
THIS TASK COVERS:
a. Removal
d. Assembly
b. Disassembly
e. Installation
c. Cleaning and Inspection
INITIAL SETUP
APPLICABLE MODELS
MATERIALS/PARTS
All
Five screw-assembled lockwashers
TEST EQUIPMENT
Multimeter (Appendix B, Item 3)
TOOLS
General mechanic’s tool kit
(Appendix B, Item
1)
Tool
kit, electrical (Appendix B, Item 2)
(Appendix F, Item 169)
REFERENCES (TM)
TM 9-2320-361-34P
EQUIPMENT CONDITION
Personnel heater guard removed (para. 17-11).
NOTE
Tag wires for installation.
I
a. Removal
1. Remove two
screw-assembled
lockwashers (8) and ignition control leads (4) from flame detector
switch (7). Discard screw-assembled lockwashers (8).
2. Remove screw-assembled lockwasher (1) and blower motor lead (9) from flame detector switch (7).
Discard screw-assembled lockwasher (1).
3. Remove two screw-assembled lockwashers (2) and receptacle leads (3) from flame detector
switch (7). Discard screw-assembled lockwashers (2).
4. Loosen nut (6) and remove flame detector switch (7) from heater housing (5).
I
b. Disassembly
1.
Remove adjusting screw (10), washer (11), and spring (17) from microswitch (12) and mount
(13).
CAUTION
Ceramic rod is very brittle and is easily broken; handle carefully.
2.
Tilt microswitch (12) back on mount (13).
3. Invert microswitch (12) and remove ceramic rod (18) from probe (14).
4. Remove nut (15) and sleeve
(16)
from probe (14).
c. Cleaning and Inspection
Inspect flame detector switch (7) for oxidation and dirt, broken ceramic rod (18),
and bent or distorted
probe (14). If oxidized or dirty, clean by removing ceramic rod (18) and lightly rapping side of probe (14)
to loosen oxides and dirt. Replace flame detector switch (7) if ceramic rod (18) is broken or probe (14) is
damaged.
17-36
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