TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Coolant Thermostat (008-013)
Section 8 - Cooling System - Group 08
Page 8-9
CAUTION
Do not pull the heater into location with the locking bolt
as the channel (T-Bar) can bend or cause the threads to
strip.
Plastic Hammer
If necessary, use a plastic hammer to tap the heater in until
the shoulder contacts the block.
10 mm Socket, Inch lb. Torque Wrench
Torque Value:
Minimum:
1.3 Nm
[12 in-lb]
Maximum:
2.8 Nm
[25 in-lb]
NOTE: Do not overtighten.
Insert the power cord into the socket being careful to align
the pins with the sockets of the power cord. Tighten the
retaining nut by hand.
Do not apply power until the cooling system is filled, and
has run long enough for the thermostat to open and allow
the air to escape.
Coolant Thermostat (008-013)
General Information
The thermostat controls the coolant temperature. When the
coolant temperature is below the operating range, coolant
is bypassed back to the inlet of the water pump. When the
coolant temperature reaches the operating range, the ther-
mostat opens, sealing off the bypass, forcing coolant to flow
to the radiator.
L-1065
