DR Power 30 Snow Thrower - Manual (Page 33)

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Replacing the Shear-Bolt
If you should strike a foreign object (wood, stone, curbing, etc.) there is a safety Shear-Bolt in the Auger Drive
System that will break, stopping the Auger from turning.
When replacing the Shear-Bolt, also check the Drive
Belt for wear. See page 28.
BEFORE PERFORMING ANY MAINTENANCE PROCEDURE OR INSPECTION: STOP THE ENGINE, SET THE
PARKING BRAKE, WAIT FOR ALL MOVING PARTS TO COME TO A COMPLETE STOP AND DISCONNECT THE
SPARK PLUG WIRE(S), KEEPING IT AWAY FROM THE SPARK PLUG(S).
Tools Needed:
•
1/2" Wrench or Socket
•
5/16" Wrench or Socket (2-places)
1. To replace the Shear-Bolt, remove the four (4) Bolts using a 1/2" Wrench or Socket that retain the Belt
Cover and remove the Cover (Figure 18).
2. Remove any debris from the Shear-Bolt holes located in the Pulley Hub and Auger Drive Shaft (Figure 18).
3. Align the Shear-Bolt hole in the Pulley with the Shear-Bolt hole in the Auger Drive Shaft and insert the new
Shear-Bolt (Figure 18). Install the supplied Nut on the Shear-Bolt with two (2) 5/16" Wrenches or Sockets
until the Nut just touches the Hub and then back the Nut off 1/2 turn. The Shear-Bolt will fail prematurely
if over tightened.
4. Reinstall the Belt Cover and secure with the four (4) Bolts.
Figure 18
Shear-Bolt
Pulley
Hub
Drive Shaft
Nut
Bolt - 4 places
Belt Cover
Belt
Belt
Belt