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Page Title:
ENGINE COOLANT HEATER FLAME DETECTOR SWITCH MAINTENANCE - continued |
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 TM 9-2320-361-24-2
0417 00
ENGINE COOLANT HEATER FLAME DETECTOR SWITCH MAINTENANCE (Contd)
NOTE
Prior to removal, tag lead wires for installation.
REMOVAL
1.
Remove four screws (6) and guard (7) from heater housing (8).
2.
Remove nut-assembled lockwasher (2), ground lead (3), air tube (4), and elbows (1) and (5) from
heater housing (8). Discard nut-assembled lockwasher (2).
3.
Remove five screw-assembled lockwashers (11) and six leads (12) from flame detector switch (10).
Discard screw-assembled lockwashers (11).
4.
Loosen nut (9) and remove flame detector switch (10) from heater housing (8).
DISASSEMBLY
1.
Remove adjusting screw (15), washer (16), and spring (17) from switch bracket (24) and
mount (18).
CAUTION
Ceramic rod is very brittle and is easily broken; handle
carefully.
2.
Tilt microswitch (13) back on switch bracket (24), invert, and remove ceramic rod (22) from
probe (20).
3.
Remove two nut-assembled lockwashers (14), screws (23), and microswitch (13) from switch
bracket (24). Discard nut-assembled lockwashers (14).
4.
Remove split roll pin (21) and switch bracket (24) from mount (18).
5.
Remove sleeve (19) and nut (9) from probe (20). Discard sleeve (19).
INSPECTION
1.
Inspect flame detector switch (10) for broken ceramic rod (22) or bent probe (20). Replace ceramic
rod (22) if broken. Replace flame detector switch (10) if probe (20) is bent.
2.
Inspect flame detector switch (10) for carbon buildup and corrosion. Remove carbon buildup or
corrosion. Refer to WP 0021 00 for general inspection procedures.
0417 00-2
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