WEAR PLATE
PUMP HOUSING
I
BEARINGS AND SHAFT
IMPELLER IMPELLER
HOUSING GASKET SEAL ASSEMBLY
INTERNAL RETAINING
RING
EXTERNAL RETAINING
RING
7.
8.
FlGURE
22.
PUMPWE319257
Install the pump end plate using a new gasket and
tighten end plate screws to
15-17
inch pounds
(1
-7-1.9 Nm).
Install pump on engine (Step k) and attach hoses.
Assembly
Inspect the impeller housing for wear, rough sur-
faces, or pitting, and replace if any of these conditions
exist. Replace any other worn components, such as
bearings; seals, dr impeller and use a new impeller
housing gasket.
1.
Install the new slinaer on
the
water Dump shaft.
WATER
PUMP
#131-0257
Water pump
#131-0257
is a neoprene impeller type
pump (see Figure
22).
Disassembly
1. Disconnect all hoses and remove the pump from
the engine.
2.
Loosen the pulley set screw and remove the pul-
ley
from the pump shaft.
3.
Remove the impeller housing screws, impeller
housing, and gasket.
4.
Pull
the impeller out of the impeller housing.
5.
Remove the wear plate from the pump housing,
using a screwdriver
to
pry the plate loose 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
theseal 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.
10.
Remove the slinger from the water pump shaft.
1
..
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 housing secur-
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.
28
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