Ski-Doo Formula S 1998, Shop Manual

Page: 162 / 338

Section 05 TRANSMISSION
Subsection 03 (DRIVE PULLEY)
05-03-13
INSTALLATION
Clean mou nting surface s a s d escribed in
CLEANING above.
Drive Pulley Ass’y
The installation procedure must be strictly ad-
hered to as follows.
Lock crankshaft in position as explained in remov-
al procedure.
Install drive pulley on crankshaft extension.
Install conical washer with its concave side to-
wards drive pulley then install screw.
Torque screw to 90 to 100 N•m (66 to 74 lbf•ft).
Install drive belt and belt guard.
Raise and block the rear of the vehicle and sup-
port it with a mechanical stand.
Accelerate the vehicle at low speed (maximum 30
km/h (20 MPH) and apply the brake, repeat 5
times.
Recheck the torque of 90 to 100 N•m (66 to 74
lbf•ft).
DRIVE PULLEY ADJUSTMENT
The drive pulley is factory calibrated to transmit
maximum engine power at a predefined RPM.
Factors such as ambient temperature, altitude or
surface condition may vary this critical engine
RPM thus affecting snowmobile efficiency.
This adjustable drive pulley allows setting maxi-
mum engine RPM in the vehicle to maintain max-
imum power.
Calibration screws should be adjusted so that ac-
tual maximum engine RPM in vehicle matches
with the maximum horsepower RPM given in
TECHNICAL DATA 10.
NOTE: Use precision digital tachometer for en-
gine RPM adjustment.
NOTE: The adjustment has an effect on high
RPM only.
To adjust, modify ramp end position by turning cal-
ibration screws.
26,28,29, Calibration Screw, Locking
Nut and Governor Cup
Calibration screw has a notch on top of its head.
1. Notch
;
WARNING
Do not apply anti-seize or any lubricant on
crankshaft and drive pulley tapers.
;
WARNING
Never use any type of impact wrench at
drive pulley removal and installation.
;
WARNING
Never substitute lock washer and/or screw
with jobber ones. Always use Bombardier
genuine parts for this particular case.
;
WARNING
Ensure that the track is free of particles
which could be thrown out while track is ro-
tating. Keep hands, tools, feet and clothing
clear of track. Ensure nobody is standing
near the vehicle.
;
WARNING
After 10 hours of operation the transmission
system of the vehicle must be inspected to
ensure the retaining screw is properly
torqued.
A16D0FA
1