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8. Maintenance Section – ST50 Snow Thrower
8.1 Service Intervals
Check Point
Item #
Check ST50 Impeller Shear Bolt is
1
tight.
2
Check all Hardware are Tight
Ensure that the ST50 discharge Spout
3
moves freely from right to left
Check Deck Drive Belt Tension –
4
Engine to the Mower Deck
5
Replace Impeller Shear Bolt
6
Check Drive Belts for Physical Wear
8.2
Replacement of the Impeller Shear Bolt – ST50
WARNING
Location of the
Impeller Shear
Bolt.
Use Hour Interval (change or check every interval)
Check Daily
To avoid personal injury ALWAYS shut the engine off
when working on the impeller.
50 Hours
or Weekly
x
x
x
x
The Shear bolt is a
1/4NC x 1Gr.8YZP w.
Smooth Flanged
Lock Nut
Manual
Annually
Reference
Page
x
x
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