Ski-Doo Formula S 1998, Shop Manual

Page: 80 / 338

Section 04 ENGINE
Subsection 02 (277 ENGINE TYPE)
04-02-5
Screw in puller in order to remove it from piston.
Remove piston from connecting rod.
Install locating sleeve. Then push needle bearings
along with thrust washers using a 21 mm (.826 in)
diameter pusher.
1. Pusher 21mm (.826 in)
NOTE: 0.25 and 0.5 mm oversize pistons and
rings are available if necessary.
Use a locking tie to fasten all needles and thrust
washers along with sleeves.
INSPECTION
Refer to LEAK TEST AND ENGINE DIMENSIONS
MEASUREMENT 04-04.
ASSEMBLY
When reinstalling original needle bearings, make
sure that 31 needles are inserted between expan-
sion sleeve and locating sleeve.
1. Expansion sleeve
2. 31 needles
3. Locating sleeves
– Grease thrust washers and install them on each
end of needles.
– Using a 21 mm (.826 in) diameter pusher, insert
needles into connecting rod.
Mount piston over connecting rod with the letters
“AUS” (over an arrow on the piston dome) facing
in the direction of exhaust port.
1. Exhaust
Install piston pin puller (P/N 529 0290 00) and turn
handle until piston pin is correctly positioned in
piston.
A21C04A
1
A21C03A
1
2 3
A21C02A
A01C01A
AUS
1
A21C01A