Hudson 1948 - 1952, Service Manual

Page: 132 / 333

5 - 6 COOLING SYSTEM
clearance for the pulley hub. The slotted adaptor is placed
between the body and the pulley hub to support the lower
part of the body to eliminate spring-back and possible
body fracture when removing the water pump shaft
.
The bearing and shaft is serviced as an assembly only.
The water pump pulley hub (19) is not part of the shaft and
must be removed from the old shaft and Installed on the
new shaft. The adaptor included in J-2778 Holding Fixture
Kit can be used to remove the pulley hub.
NOTE: Check the water pump body bore for scores and
wear. Inspect seal surface in pump body, if rough, reface.
If scored, replace pump body.
Also check the pump body at the area of the impeller
and if the impeller has been scraping the body, it indi-
cates the excessive end thrust and complete pump
should be replaced.
WATER PUMP SHAFT AND
BEARING INSPECTION
1. Revolve bearing slowly by hand, using hand thrust
load. If bearing does not drag or feel rough, it can be
reused.
2. If steel seals at ends of bearing, outer races are loose so
that they can be turned with the fingers, the bearing
should be replaced.
3. Worn shafts and shafts with a worn spring retainer
groove should be replaced.
REASSEMBLY: - 6 Cylinder
1. Assemble the shaft and bearing in the water pump
body.
NOTE: Bearing should be slight press fit into pump
body, and assembled so that the groove on the outer
race is aligned with the retainer wire slot in pump
body bore.
CAUTION: When pressing bearing and shaft in housing,
press against face of outer ring, not against shaft.
2. Lubricate shaft with castor oil and Install the fan pulley
hub '(19). Support the flange of the hub and apply pressure
on the impeller en d of the shaft. Maintain proper pulley
spacing. This dimension should be 5-5/32" from outside
edge of hub to cover face of pump body, shown as "A",
Figure 2.
NOTE: Pump body should be allowed to float during this
operation.
FIGURE 4
3. Lubricate shaft with caster oil to facilitate assembly and
assemble the seal (13) and carbon washer (14) and re-
tainer (8) in the impeller and Install impeller by support-
ing the assembly on the fan end of the shaft as shown in
Figure 4.
NOTE: Impeller must protrude .007 to .017 beyond cover
face of pump body, Figure 2.
4. Install the water pump shaft and bearing retainer (6),
Figures 2 & 3.