Ski-Doo FORMULA III, Shop Manual

Page: 146 / 356

Section 04 ENGINE
Sub-Section 09 (ROTARY VALVE, COOLANT PUMP AND RESERVOIR)
04-09-2
NOTE : Some verifications can be per-
formed with engine in vehicle. Refer to EN-
GINE DIMENSION MEASUREMENT 04-03.
GENERAL
Engine must be removed from vehicle to work on rotary
valve shaft / components. Refer to
Removal and in-
stallation of appropriate engine for procedures.
Bottom end must be opened to remove rotary
valve shaft.
CLEANING
Discard all seals and O-rings.
Clean all metal components in a non-ferrous met-
al cleaner.
DISASSEMBLY
1,2, Screw and Rotary Valve Cover
NOTE : Before removing rotary valve, check
valve timing as described in Rotary valve
timing at the end of this sub-section.
Unscrew 4 retaining screws and withdraw rotary
valve cover and valve.
3,17, Circlip and Pump Impeller
CAUTION : Bottom end must be opened
to remove rotary valve shaft.
To remove rotary valve shaft assembly from
crankcase, first remove coolant pump impeller
and circlip on valve side. Using the suitable pusher
(P / N 420 8766 12) and a fiber hammer, push
shaft assembly.
CAUTION : To prevent damage to the end
of the rotary valve shaft, use pusher (P / N
420 8766 12).
8,9,10, Circlip and Spring Retaining Cup
If it is necessary to disassemble components of
rotary valve shaft assembly, compress spring re-
taining cup with rotary valve circlip tool (P / N 529
0291 00) in order to remove circlip. Remove gear
and distance sleeve then external circlip.
1. External circlip
2. Circlip
To remove bearing, use a bearing puller (ex. :
Snap-on no. CJ 950) and pusher (P / N 420 8766
12) as illustrated.
1. Press
2. Bearing
3. Bearing puller. Ex. : Snap-on no. CJ 950
-
A16C0NA
420 8766 12
-
A16C14A
529 0291 00
2
1
A13C0DA
1
420 8766 12
2
3