General; Maintenance; Removal - BOMBARDIER ski-doo Tundra Scandic 2004 Series Shop Manual

Section 05 TRANSMISSION
Subsection 03 (DRIVE PULLEY)

GENERAL

Some drive pulley components can be changed to
improve vehicle performance in high altitude re-
gions. A Service Bulletin will give information
about calibration according to altitude.
CAUTION: Such modifications should only be
performed by experience mechanics since they
can greatly affect vehicle performance.
WARNING
Any drive pulley repairs must be performed by
an authorized Bombardier snowmobile dealer.
Sub-component installation and assembly tol-
erances require strict adherence to procedures
detailed.

MAINTENANCE

Cam Arm Pivot Nut
At first 10-hour (500 km) cam arm pivot nuts no. 15
have to be retighten.
To do so, loosen one turn all cover screws no. 2.
Retighten to 5.6 N•m (50 lbf•in) maximum all three
pivot nuts no. 15. Make sure cam arms no. 12 can
still move on their pivot bolts no. 11.
Retighten cover screws no. 2 to 12 N•m (106 lbf•in).
Proceed with one screw per tower in a criss-cross
sequence then, remaining three screws.
Cam Arm Bushing
Cam arm bushings no. 14 have to be replaced ev-
ery 3000 km (2000 m.).
With drive pulley still installed on crankshaft, re-
move one cam arm no. 12 at a time. Install parts
included in Cam Arm Kit. Proceed with remaining
cam arms.
Loosen one turn all cover screws no. 2.
Retighten to 5.6 N•m (50 lbf•in) maximum all three
pivot nuts no. 15. Make sure cam arms no. 12 can
still move on their pivot bolts no. 11.
Retighten cover screws no. 2 to 12 N•m (106 lbf•in).
Proceed with one screw per tower in a criss-cross
sequence then, remaining three screws.
05-03-6

REMOVAL

WARNING
Never use an impact wrench to remove or in-
stall the drive pulley.
Unfasten center and rear bottom pan attachments
on left hand side. Remove belt guard.
Open driven pulley using driven pulley opening
tool (P/N 529 017 200). Remove drive belt.
Use holder (P/N 529 006 400). Make sure holder
hook is positioned on top of tower.
1. Holder hook on top of tower
Remove retaining screw no. 1.
MMR2004_123_05_03A.FM