Ariens Sno-Thro 939003-ST520E User Manual

Page 18

GB - 20

ATTACHMENT DRIVE BELT
REPLACEMENT

Remove Attachment Drive Belt

(Figures 20 and 21)

1. Shut off engine, remove key, disconnect spark

plug wire and allow unit to cool completely.

2. Remove two screws securing belt cover to unit

and remove belt cover.

3. Remove spring pin from chute crank and

seperate (Figure 20).

4. Remove belt fingers by removing cap screws

mounting belt fingers to engine (Figure 21)

IMPORTANT: To avoid bending bottom cover, remove
the cover before separating the blower housing from
the unit.

5. Support Sno-Thro frame and housing.

6. Remove top two cap screws and loosen lower

cap screw holding blower housing to frame on
each side.

7. Remove attachment drive belt from engine

sheave (it may be necessary to turn engine
sheave using recoil starter handle).

8. Separate housing from unit. Lower handlebar on

floor.

9. Remove attachment drive belt from lower pulley.

Replace Attachment Drive Belt

1. Place new belt onto lower pulley and while

holding brake out of way, tip unit together.

NOTE: Engage attachment clutch lever while
connecting housing to frame to hold brake out of the
way.

2. Secure blower housing to frame with cap screws

removed in step 6 of Remove Attachment Drive
Belt on page 20.

3. Place belt onto engine sheave.

4. Replace belt fingers.

IMPORTANT: BELT FINGERS MUST BE SET as
shown in Figure 22. Improper adjustment may cause
impeller to rotate while attachment clutch is
disengaged.

5. Adjust clutch per Attachment Clutch/Brake

Adjustment on page 18.

6. Replace belt cover and secure with cap screws.

7. Run-in the drive belt according to instructions in

Run-in Attachment Belt on page 10 and then
check attachment drive clutch adjustment. See
Attachment Clutch/Brake Adjustment on page 18.

CAUTION: Always support Sno-Thro frame
and housing when loosening the cap screws
holding them together. Never loosen cap
screws while unit is in service position.

Figure 20

1. Chute Crank
2. Belt Cover
3. Bottom Cover

4. Belt Cover Screw
5. Housing Bolt Holes

OS7240

Figure 21

1. Attachment Drive Belt
2. Engine Sheave
3. Traction Drive Belt
4. Attachment Idler Nut
5. Attachment Belt Idler
6. Belt Finger