13
Bolt Torque - 7420, 8420 & 8420G Snowblower
CAUTION
Always check to see that both ends of the PTO shaft are securely
attached as per instructions every time you are preparing to use
the snowblower.
10. When replacing bearings or tightening a loose bearing collar, always tighten collar in the
direction of shaft rotation using a center punch or a similar tool.
11. Shear Sprocket: The shear sprocket (965827) should be checked at the beginning of every
season to make sure it will spin freely. With time the sprocket plate could corrode and seize
which will not allow the shear bolt to break if something jams in the snowblower auger. Clean
to loosen if necessary.
Theory of Operation
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