Ski-Doo FORMULA S 1997, Shop Manual

Page: 72 / 926

Section 03 ENGINE
Sub-Section 03 (377, 443 AND 503 ENGINE TYPES)
03-03-7
– Remove piston pin puller and expansion
sleeve.
– Install circlips as described below.
– When installing new needle bearing, insert
needles with thrust washers. Instead of expan-
sion sleeve, needles are held in place by 2 inner
plastic cage halves.
– Use piston pin puller (P / N 529 0210 00) to in-
sert piston pin. Plastic halves should come off
piston. If not, pull them out using long nose pli-
ers.
– Install circlips as described below.
At assembly, place the pistons over the connect-
ing rods with the letters “AUS” (over an arrow on
the piston dome) facing in the direction of the ex-
haust port.
1. Exhaust
All Engines Except 503
To center the piston pin with the connecting rod
bearing, use centering tool (P / N 529 0091 00).
NOTE : The circlip on the opposite side can
be installed before pin installation, the tool
will easily go out.
All Models
To minimize the effect of acceleration forces on
circlip, install each circlip so the circlip break is at
6 o’clock as illustrated. Use piston circlip installer
(P / N 529 0169 00).
1. Place circlip in
2. Restrain
3. Oil
A21C01A
A21C01A
A01C01A
AUS
1
A01B1SA
529 0091 00
'
A01B1QA
1
2
3
529 0169 00