1948-1952 Shop Service Manual - - Hudson-Essex-Terraplane Club

5 - 8 COOLING SYSTEM
5. Use a new cover gasket (3) and Install body cover (2).
6. Install fan hub (9), fan blades (10), lock-washers (20), and
screws (21). Tighten screws to 12 to 15 lbs. Torque.
NOTE: Dimension from outside edge of fan pulley hub to
cover face of pump body should be 4-27/32", Shown as
"A", Figure 2.
DISASSEMBLY AND REASSEMBLY:
(8 Cylinder)
Follow the same procedure as outlined for 6 cylinder
Disassembly an d Assembly. Refer to Figure 5 for order of
parts removal and Installation.
Installation:
6 & 8 Cylinder
1. Remove all traces of the old pump to block gasket and
Install new gasket and pump to engine. Install attaching
bolts.
NOTE: Clearance from outside edge of fan blade to
radiator case should be 7/8".
2. Install generator adjusting strap and fan belt.
FIGURE 6
Swing generator away from the engine until the slack in
the fan belt is such that the section between the water pump
pulley and the generator pulley can be pushed down 3/4"
below a straight edge laid across the pulleys as shown at (C).
After proper adjustment, tighten adjusting arm and
generator mounting bracket bolts and nuts.
THERMOSTATS
The temperature at which the thermostat opens is very
important and it should be checked whenever the complete
cooling system is being checked.
CAUTION: In cases of extreme overheating or freezing,
check the thermostat, as the excessive temperature may
have caused the bellows to take a set in the expanded
position.
3. Install hoses.
4. Install generator adjusting strap bolt in generator bracket
and adjust fan belt.
5. Refill radiator.
FAN BELT ADJUSTMENT
NOTE: The fan belt must be operated with a definite
amount of slack to prevent an overload being placed on
the water pump and generator bearings.
Adjustment of the belt is obtained by swinging the generator
on its mountings as follows:
1. Loosen the two generator bracket bolt nuts (D) and (E)
and adjusting arm bolt (F), Figure 6.
FIGURE 7
Place the thermostat in a pail of water with a thermometer
and heat the water until the thermostat starts to open. The
thermometer should show from 150° to 155° F, Figure 7.