Clean Dust Unloader Valve
IMPORTANT:
A missing, damaged, or hardened dust unloader valve will make dust cup precleaner ineffective, causing very short element life. Valve should suck closed above 1/3 engine speed.
Inspect unloader valve (A) for wear or damage and replace as necessary.
A-Dust Unloader Valve
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(S.N. -848458) Shown
S.N. (888004--) Shown
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