MAINTENANCE
18
As the blades wear, shims located in the stack outside of the
impeller can be transferred behind the impeller. This will move the
impeller further down into the tapered liner to reduce the clearance.
a - Shims
b - Clearance between impeller edge and liner
Check the impeller clearance by sliding a feeler gauge through the
intake grate and measure the clearance between the impeller edge
and liner. If adjustment is required, refer to Impeller Removal and
Installation.
Replaceable Jet Drive Shear Key
The jet drive is equipped with a shear key to protect it in the event
of a lodged impeller. The shear key can be reached by removing
the water intake housing and impeller. Refer to Maintenance -
Impeller Removal and Installation.
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