Polaris Magnum 2x4 Service Manual page 157

ENGINE
EC38PL Engine
Disassembly, Cont.
5. Remove water pump impeller and check
clearance measurement. Acceptable
clearance measured with a dial caliper is
between .020" - .040" (.05 -.1 cm). CAUTION:
If the clearance is less than .020" (.05 cm) the
impeller may grind against the case. If the
clearance is more than .040" (.1 cm) the water
pump may cavitate.
6. The photo at right illustrates checking
clearance measurement with a feeler gauge.
This method may also be used to check
thickness by removing half of the putty from the
impeller blade.
Spacer shim part numbers:
PN 3084188 0.1 mm!.004"
PN 3084189 0.2 mm/.008"
The illustration depicts correct
positioning of the seals. The water
seal is identified by counting the
number of sealing "lips". It is a triple
lip seal and has a protruding edge
that faces away from the spring.
The oil seal is a double lip variety.
The lip (on the spring end) angles
back toward the spring. The spring
end of the seals (open side) must
face the oil or coolant as shown in
the illustration.
To assemble the pump casing,
press the bearing into the casing
until flush with the casting. Note:
Do not press the bearing in until it
seats against the shoulder, or the
oil hole will be covered by the bear-
ing outer race. Next, press the oil
seal into the seal bore until the
weep hole is visible. Now press the
water seal in until flush with the out-
er edge of the seal bore.
5/98
3.32
Bearing
Counterbalancer
Lip/Spring
Lip/Spring Toward Toward Impeller
Counterbalancer
~
Oil Seal Water Seal
3084184 3084185
Press Oil Seal
Past Weep Hole
Polaris Industries Inc.