Hudson 1948 - 1952, Service Manual

Page: 130 / 333

5 - 4 COOLING SYSTEM
FIGURE 2
WATER PUMP
(6 Cylinder)
The water pump features a permanently lubricated ball
bearing (18), Figure 3, for the pump shaft and non-adjust-
able packing (13). A permanent seal, which makes repack-
ing unnecessary, consists of a graphite washer (14) adjacent
to the impeller (12), backed with a neoprene seal (13) and
brass spring and retainer (8) for maintaining constant con-
tact on these two units. The graphite washer (14) is pre-
vented from turning in the impeller (12) and housing by
means of four ears which are retained by four correspond-
ing slots in the impeller. The neoprene seal stops any fluid
which might pass between the graphite washer and impeller.
A large drain hole at bottom side of pump body allows
for drainage and acts as a vent to minimize moisture forma-
tion in the pump assembly.
The pump shaft is mounted in a permanently lubricated
double row ball bearing with grooves in the shaft to furnish
race-ways for the bearing balls and provide a means of
taking end thrust of the fan and pump
The bearing and shaft are retained in the pump housing
by the shaft bearing retainer (6).
WATER PUMP REMOVAL:
1. Drain the cooling system by opening drain cock at lower
right side of radiator and remove the pipe plug from left
rear side of cylinder block.
NOTE: It is not necessary to remove the radiator to
remove the pump; however, use care when removing and
Installing the pump.
2. Loosen the bolt in the fan belt and generator adjusting
bracket and move generator in toward the cylinder block
to remove the fan belt.
3. Disconnect hose from the water pump inlet.
4. Remove the bolt and nut from the generator adjusting
bracket to cylinder block and remove bracket.
5. Re move the four bolts and lock washers attaching fan
blades to fan pulley and hub, and remove the fan blades.
6. Remove bolts attaching water pump to block and remove
the water pump.
DISASSEMBLY:
1. Remove the water pump shaft retainer (6), cover (2), and
gasket (3), Figure 3.
2. Place the water pump assembly in "Water Pump Holding
Fixture J-2778, and using shaft driver contained in the set,
press out the pump shaft and bearing assembly (18) with
water pump pulley hub (19) attached.
NOTE: The fixture is designed to support the water pump
body on a level plane while removing the shaft from the
impeller. The height of the support stud is controlled by
adjusting nuts which are run up on the stud to level the
water pump body. The large hole in the base plate provides