TM 5-3810-307-24-1-2
Temperature Sensor. (Refer to Figures J-19 and J-20.)
Removal.
a.
Ensure battery disconnect switch is in the OFF position.
b.
Remove two bolts (1, Figure J-19) and remove cover (2) from boxed enclosure (3) of the
coolant heater (4).
c.
Cut tie wrap (23, Figure J-20). Then remove screws (6), lockwashers (8), and cover (9).
d.
Tag and disconnect wiring from temperature sensor (22).
e.
Remove temperature sensor (22) and preformed packing (13).
Discard preformed
packing (13).
Installation.
a.
Install temperature sensor (22, Figure J-3) with new preformed packing (13) into outer
casing (15) of heat exchanger (20).
b.
Connect wiring from temperature sensor (22) as tagged. Remove tags.
c.
Install cover (9), lockwashers (8), and screws (6). Install new tie wrap (23).
d.
Replace cover (2, Figure J-19) on boxed enclosure (3) and secure with two bolts (1).
Combustion Air Blower Motor. (Refer to Figures J-19 and J-20.)
Removal.
a.
Ensure battery disconnect switch is in the OFF position.
b.
Remove two bolts (1, Figure J-19) and remove cover (2) from boxed enclosure (3) of the
coolant heater (4).
c.
Remove engine coolant heater (4) as described above.
d.
Remove the control unit (2, Figure J-20) as described above.
e.
Remove screws (26), combustion blower and cover (25), and seal (28). Discard seal
(28). Ensure all remnants of the seal are removed from the burner assembly (4). Use
care to avoid damage to the sealing surface.
f.
Tag and disconnect wires from combustion blower motor and remove combustion blower
and cover (25).
Installation.
a.
Connect wires from combustion blower and cover (25, Figure J-20) as tagged. Remove
tags.
b.
If installing a new combustion blower and cover (25) proceed to step c. Otherwise,
remove all remnants of the old seal (28) from the combustion blower (25). Use care to
avoid damaging the sealing surface.
Change-1 J-51