Ariens 939001 ST520E Specifications download pdf (Page 19)

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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 (Figures 20 and 21).

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 18).

3. Push the traction drive belt off the engine pulley

toward the engine as shown in Figure 23.

NOTE: To make belt removal easier, slowly pull the

recoil starter while pushing the traction drive belt off the

engine pulley.

4. Remove and discard traction drive belt from the

unit.

5. Place new traction drive belt on engine pulley

between the engine and pulley groove as shown

in Figure 23.

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.

Figure 21

1.Attachment Drive Belt

2.Engine Sheave

3.Traction Drive Belt

4.Attachment Idler Nut

5.Attachment Belt Idler

6.Belt Finger

Figure 22

1/8 to 3/16 in.

(3.2–4.8 mm)

1. Belt Finger

2. Belt

1/8 to 3/16 in.

(3.2–4.8 mm)

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.

Figure 23

Position the traction drive

belt on the engine

sheave like this when

removing and installing it.

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Ariens 939001 ST520E Specifications Page 19

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