Sea-doo SP Shop Manual page 87

Section 03 ENGINE
Sub-Section 07 (ROTARY VALVE)
INSPECTION
1, Rotary Valve Cover
Inspect rotary valve cover for warpage. Small de-
formation can be corrected by surfacing with fine
sand paper on a surface plate. Surface part
against oiled sand paper.
8,9 Bearing
Inspect bearings. Check for scoring, pitting, chip-
ping or other evidence of wear. Make sure plastic
cage (on bigger bearing) is not melted. Rotate
them and make sure they turn smoothly.
10, Gear
Visually check gear wear pattern. It should be
even on tooth length all around. Otherwise it
could indicate a bent shaft, check deflection. Re-
place gear if damaged.
Check for presence of brass filings in gear hous-
ing.
Rotary Valve Shaft Deflection
Deflection is measured with a dial gauge. Install
rotary valve shaft in crankcase half, without its
gear.
NOTE: End bearing must be in crankcase half.
Measure shaft deflection next to gear splines.
1
F01D2CA
1. Rotary valve shaft
2. End bearing in place
03-07-6
Deflection must not exceed 0.08 mm (.003 in).
Replace shaft as necessary.
ASSEMBLY
Assembly is essentially the reverse of disassem-
bly procedures. However pay particular attention
to the following.
9, Bearing
To install end bearing in crankcase, use the appro-
priate pusher according to the engine.
A00B2JA
1. Pusher (P/N 290 876 500)
2
F00B07A
1. Pusher (P/N 290 876 501)
Position ball bearing shielded side towards rotary
valve.
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ENGINE
717/717D P/N 290 876 500
787 P/N 290 876 501
1
1
PUSHER