Driven Pulley - Arctic Cat Sno Pro 500 Operator's Manual

DRIVEN PULLEY

Disassembling
1. Remove the four torx head cap screws securing the
cam to the movable sheave; then grasp the cam
and by working the movable sheave back and
forth, lift it up and off the shaft.
NOTE: If changing cam angles, move the cam 90°
to its optional position and secure the cam with
the eight torx head cap screws. Tighten to 0.7-0.8
kg-m (5-6 ft-lb).
2. Using Driven Pulley Compression Tool (p/n 0644-
439), position the tool over the roller assembly;
then compress the assembly enough to allow the
snap ring to be removed from the end of the shaft.
Remove the snap ring.
NOTE: It is advisable to secure the compression
tool in a vise or to bolt it to a sturdy workbench.
3. Remove the compression tool and account for the
snap ring, spider assembly, spring, and a retaining
ring.
NOTE: Note the location of the "X" stamped on
CM086
the roller assembly for assembling purposes.
4. Remove the movable sheave from the driven pul-
ley shaft and account for one spacer.
Cleaning And Inspecting
NOTE: Whenever a part is worn excessively,
cracked, or damaged in any way, replacement is
necessary.
1. Using a parts-cleaning solvent, wash grease, dirt,
and foreign matter off all components; dry with
compressed air.
CM087
2. Remove any drive belt dust accumulation from the
stationary sheave, movable sheave, and bushings
using parts-cleaning solvent only.
Do not use steel wool or a wire brush to clean com-
ponents having a bushing; damage to the bushing
will result.
3. Inspect the roller assembly for wear or damage.
NOTE: Flat spots or diameter cannot be less than
23 mm (0.925 in.).
4. Inspect shaft for nicks or burrs.
5. Using a spring compression scale, measure spring
rate at proper load heights (secondary springs
measured at load heights of 2.2 in. and 1.1 in.).
NOTE: If a spring rate measures less than 10% of
specified load height, it must be replaced.
6. Measure the inside diameter of the movable
sheave bushing. Bushing to shaft clearance must
not exceed 0.25 mm (0.010 in.).
CM088
CAUTION
CM089A
71