Traction Drive Belt Replacement - Ariens 939 SNO-THRO 939001 Service Manual

Replace Attachment Drive Belt
1. Place new belt onto lower pulley.
2. While holding brake out of way, tip unit together.
NOTE: Engage attachment clutch lever while connect-
ing housing to frame to hold brake out of the way.
3. Attach blower housing to frame with cap screws
removed in step 5 of "Remove Attachment Drive
Belt" on page 15.
4. Place belt onto engine sheave.
5. Replace belt fingers.
IMPORTANT: BELT FINGERS MUST BE SET as
shown in Figure 9. Improper adjustment may cause
impeller to rotate while attachment clutch is
disengaged.
6. Adjust clutch per instructions under "Attachment
Clutch/Brake Adjustment" on page 18.
7. Replace belt cover and secure with cap screws.
1/8–3/16 in.
(3.2–4.8 mm)
1
2
1. Belt Finger
OS7415
2. Belt
Figure 9
4.9 TRACTION DRIVE BELT
REPLACEMENT
NOTE: Housing and frame must be tipped apart and
attachment drive belt removed from engine sheave in
order to change traction drive belt (Figure 7).
CAUTION: Always support Sno-Thro frame
and blower housing when loosening the cap
screws holding them together. Never loosen
cap screws while unit is in service position.
1. Shut off engine, remove key, disconnect spark plug
wire and allow unit to cool completely.
2. Remove attachment drive belt (See "Remove
Attachment Drive Belt" on page 15).
3. Push the traction drive belt off the engine pulley
toward the engine as shown in Figure 10.
NOTE: To make belt removal easier, slowly pull the
recoil starter while pushing the traction drive belt off the
engine pulley.
4. Remove traction drive belt from the unit and dis-
card.
5. Place new traction drive belt on engine pulley
between the engine and pulley groove as shown in
Figure 10.
6. Place new traction drive belt on transmission pulley
7. Push the new traction drive belt onto the grooves in
the engine pulley.
NOTE: Slowly pull the recoil starter while pushing the
traction drive belt onto the engine pulley. Make sure the
belt seats properly in the grooves of the transmission
and engine pulleys.
8. Replace attachment drive belt (See "Traction Drive
Belt Replacement" on page 16).
9. Check traction drive clutch adjustment. See "Trac-
tion Drive Clutch Adjustment" on page 19.
2
1
1/8–3/16 in.
(3.2–4.8 mm)
OS7420
4 - 16
Position the traction drive
belt on the engine
sheave like this when
removing and installing it.
Figure 10