Disassembly
(Pump
131-0257)
1.
Disconnect all hoses and remove the pump from
2.
Loosen the pulley set screw and remove the pul-
3.
Remove the impeller housing screws, impeller
4.
Pull the impeller out of the impeller housing.
5.
Remove the wear plate from the pump housing,
using a screwdriver to pry loose the plate if
necessary.
6.
Remove the external retaining ring from the
impeller end of the water pump shaft.
7. Remove the two piece seal assembly. The spring
portion of the seal is removed first. The second
portion of the seal can be loosened and removed
with a screwdriver or needle-nose pliers.
8.
Remove the internal retaining ring from the drive
pulley end of the pump housing.
9.
Carefully drive out the shaft and bearing assem-
bly from the impeller end of the housing.
the engine.
ley from the pump shaft.
housing, and gasket.
,
.
10.
Remove the slinger from the water pump shaft.
Assembly
(Pump
131-0257)
Inspect the impeller housing for wear, rough surfa-
ces, or pitting and replace if any of these conditions
exist. Replace any other worn components such as
bearings, seals, or impeller and use a new impeller
housing gasket.
WEAR PLATE
1.
Install
the
new slinger on the water pump shaft.
2.
Install the ceramic part
of
the two piece seal
assembly
in
the pump housing. The rubber side
of the seal should be toward the bearings.
3.
Coat the inside of the water pump housing and
the outside of the ball bearing races with grease.
4.
Insert the water pump shaft into the pump hous-
ing, and install the internal retaining ring in the
drive pulley end of the housing.
5.
Install the spring portion of the two piece seal on
the pump shaft and secure in place with the
external retaining ring.
6.
Install the wear plate
so
that the notch in the plate
fits into the machining in the pump housing.
7.
Coat the inside of the impeller housing with
grease.
8.
Install the impeller in the impeller housing by
twisting it clockwise while pushing it into place.
9.
While holding the gasket in place against the
pump housing, install the impeller housingsecur-
ing
it
with four screws removed during disas-
sembly.
10.
Mount the pump on the engine and attach the
hoses.
11.
Align the pump drive pulley with the crankshaft
drive pulley and tighten the set screw.
PUMP HOUSING
BEARINGS AND
SHAFT
IMPELLER
IMPELLER
HOUSING GASKET
I
\
SEAL ASSEMBLY
RING
FIGURE
27.
PUMP
131-0257
39
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by any means, is strictly prohibited.
Redistribution or publication of this document
by any means, is strictly prohibited.
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