(b) Back off adjusting screw one to two
turns to allow for expansion and
(c) During extreme cold weather,
adjusting screw may be backed off
five or six turns to maintain higher
(d) Control should be readjusted for
(e) Should adjusting screw turn too
freely, tighten jam nut "C".
Full open position of shutters is at an angle of
approximately 70, (not 90). Maximum air flow is
attained between 60 and 70 of open.
Remove radiator as follows:
a. Remove radiator grill and front panel.
b. Refer to figure 8-47 and remove radiator.
Refer to figure 8-38 for removal of water inlet
manifold and connections.
3-45. Water Outlet Manifold
a. Removal and Installation. Refer to figure 8-39
and remove the flow control thermostats.
Figure 3-34. Radiator grill, removal and installation.
b. Thermostat Testing. Test the thermostats for
b. Shutter Removal. Refer to figure 3-5 and
proper opening by submerging in a container of water.
remove the Shutter.
Position a thermometer in the water and heat the
c. Shutter Control Adjustments.
container. When the thermometer indicates 180, the
(1) If shutters are not opening at desired
thermostat should start to open and should be
temperature range, remove control
completely open at 195F. If the thermostat does not
meet the above requirements, replace the thermostat.
dimensional setting of power element in
3-48. Water Pump
control assembly of 2 15/16 inches. See
A centrifugal-type water pump
assembly (fig. 3-40 (1)) is provided for circulating
coolant through the engine and radiator. The water
(Temperature must be under 150
pump is mounted in the lower right-rear corner of the
timing gear housing and is pulley-driven by a belt driven
by the crankshaft pulley. The pump shaft is supported
clockwise until plunger "B" bottoms.
in the pump bearing sleeve by a ball bearing on pulley
Shutter should be closed.
end and a roller bearing on rear end of the bearing