TM9-2320-260-34-2
17-3. ENGINE COOLANT HEATER FUME DETECTOR SWITCH MAINTENANCE (Contd)
d. Assembly
1. Install nut (6) and new sleeve (7) on probe (5).
CAUTION
Ceramic rod is very brittle and is easily broken; handle carefully.
2. Tilt microswitch (4) back on mount (8) and insert ceramic rod (1) into probe (5).
3. Rotate microswitch (4) back on mount (8) and install with spring(9), washer (3), and adjusting
screw(2)
4. Tighten adjusting screw (2) until microswitch (4) clicks. Then continue three-quarters turn past click
point.
5. Apply insulation varnish to adjusting screw (2) to hold in place.
e. Installation
1. Install flame detector switch (18) on heater housing (17) and tighten nut (6).
2. Install six leads (20) on flame detector switch (18) with five new screw-assembled lockwashers (19).
3. Install air tube (13), elbows (10) and (14) and ground lead (12) on heater housing (17) with
nut-assembled lockwasher (11).
4. Install guard (16) on heater housing (17) with four new screw-assembled lockwashers (15).
17-6
