3.24
9929422 R02 - 2017-2019 ACE 900 Service Manual
© Copyright Polaris Industries Inc.
WATER PUMP SERVICE
NOTE
The water pump cover gasket can be replaced while
the water pump housing is still installed in the engine.
1. Remove water pump assembly. (see Chapter 3 –
Water Pump Removal page )
2. Remove the three bolts retaining the water pump
q
cover to the water pump housing
w
. Discard the
gasket
e
.
3. Place the water pump drive tab
r
vertically into a soft
jaw vice.
4. Remove the bolt and washer retaining the water
pump impeller to the shaft. Inspect the impeller vanes
and water pump housing for damage.
NOTE
The water pump impeller bolt
t
is left hand threaded
(reverse thread).
5. Remove impeller from water pump shaft.
6. Using an appropriate arbor press, properly support
the water pump housing and press out the water
pump shaft from the impeller side.
7. Extract the mechanical seal and the oil seal from the
water pump housing.
NOTE
A 5/32″ (4 mm ) diameter punch will fit in the lubrication
slot to aid in the removal of the oil seal. Do not damage
the water pump shaft bearing surface.
8. Inspect the water pump shaft bore for damage.
Replace water pump housing if necessary.
9. Clean and inspect water pump shaft for excessive
wear or damage. Replace water pump housing if
necessary as shaft cannot be purchased separately.
10.Thoroughly clean mechanical seal and oil seal bores.
11. Install a NEW oil seal into the water pump housing
until fully seated.
12.Fully install the water pump shaft and two washers
into the housing.
13.Place water pump drive tab vertically into a soft jaw
vice. Install a NEW mechanical seal into the water
pump housing using special tool PU-50564. Press the
new mechanical seal in until it is flush with the
housing.
ENGINE / COOLING SYSTEM
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