BOMBARDIER SEA-DOO SPX 5838 1998 Shop Manual page 274

Section 09 PROPULSION SYSTEM
Subsection 02 (JET PUMP)
F02J0UA
1. Check for cavitation, deep scratches or other damage
21, Wear Ring
Check wear ring for deep scratches, irregular sur-
face or any apparent damage.
If impeller/wear ring clearance is too large and im-
peller is in good shape, renew wear ring.
22,24, Needle Bearing and Impeller
Shaft
WEAR
Inspect needle bearings and their contact surface.
Check for scoring, pitting, chipping or other evi-
dence of wear.
With your finger nail, feel contact surface of seal.
If any irregular surface is found, renew impeller
shaft.
Install bearings, then install impeller shaft and ro-
tate it. Make sure it turns smoothly.
RADIAL PLAY
Radial play is critical for jet pump unit life span.
Radial play of impeller shaft is checked with shaft
in housing, without impeller.
Retain housing in a soft jaw vise making sure not
to damage housing lug.
Set a dial gauge and position its tip onto shaft end,
close to end of threads.
Move shaft end up and down. Difference between
highest and lowest dial gauge reading is radial
play.
Maximum permissible radial play is 0.05 mm
(.002 in).
09-02-10
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F01J18A
TYPICAL — MEASURING IMPELLER SHAFT RADIAL PLAY
1. Dial gauge
2. Measure close to threads at shaft end
To check both bearings, proceed the same way
with other shaft end. Position gauge tip on diam-
eter, close to flats on shaft.
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F01J19A
TYPICAL — MEASURING IMPELLER SHAFT RADIAL PLAY
1. Dial gauge
2. Measure close to flats at shaft end
Excessive play can come either from worn bear-
ings or impeller shaft or damaged jet pump hous-
ing bearing surfaces.
Measuring shaft diameter will determine the de-
fective parts.
Using a micrometer, measure diameter on bear-
ing contact surfaces. Minimum shaft diameter
should be 22.24 mm (.876 in).
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