Arctic Cat ZR 120 Service Manual page 40

4. Remove the cap screws securing the upper idler
wheel assembly to the tunnel; then remove the
assembly from the tunnel.
5. Remove the four lock nuts securing the drive
sprocket bearings to the tunnel; then remove the
four carriage bolts from the tunnel.
6. Position the bearing flanges so they are directed
towards the rear; then spread the tunnel slightly
and slide the driveshaft assembly out of the tunnel.
7. Remove the track from the tunnel.
INSPECTING
1. Inspect the driveshaft for damage and for stripped
threads.
2. Inspect the bearings for roughness or damage.
3. Inspect the track for cuts, gouges, or wear.
4. Inspect the keyways in the driveshaft and in the
chain sprocket for wear or damage.
5. Inspect the chain and chain sprocket for damage or
wear.
6. Inspect the track drive sprockets for wear or damage.
INSTALLING
KEY
1. Spacer
2. Carriage Bolt
3. Bearing
4. Track Drive
Assy
5. Drive Sprockets
6. Driveshaft
7. Key
8. Chain Sprocket
IO115A
9. Lock Nut
10. Cap Screw
11. Washer
12. Chain
1. Tip the snowmobile on its side; then place the
track into position in the tunnel.
A021
A piece of cardboard should be used to protect the fin-
ish on the hood.
2. Slide the driveshaft assembly into position in the tun-
nel; then secure the drive sprocket bearings with car-
riage bolts and lock nuts. Tighten lock nuts to 15 ft-lb.
A022
CAUTION
742-425A
A022
A021
37