Section 05
TRANSMISSION
Subsection 03
(DRIVE PULLEY)
05-03-18
MMR2004_123_05_03A.FM
INSTALLATION
Clean mounting surfaces as described in CLEANING
above.
Drive Pulley Ass’y
The following installation procedure must be strict-
ly adhered to.
Install drive pulley on crankshaft extension.
Install a new conical spring washer with its con-
cave side towards drive pulley then install screw.
Use holder. See removal procedure.
Torque screw to 90 to 100 N•m (66 to 74 lbf•ft).
Install drive belt and guard.
Raise the rear of the vehicle and support 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. Fac-
tors such as ambient temperature, altitude or sur-
face 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 actu-
al maximum engine RPM in vehicle matches with
the maximum horsepower RPM given in TECHNI-
CAL DATA.
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
Governor cup has 6 positions numbered 2 to 6.
Note that in position 1 there is no stamped num-
ber (due to its location on casting).
See TECHNICAL DATA for original setting.
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 conical spring 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 rotating.
Keep hands, tools, feet and clothing clear of
track. Ensure nobody is standing near the ve-
hicle.
WARNING
After 10 hours of operation the transmission
system of the vehicle must be inspected to en-
sure the retaining screw is properly torqued.
A16D0FA
1
Summary of Contents for ski-doo Tundra Scandic 2004 Series
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