420sx Operator’s Manual Service - 111
50 Hour
Check Air Filter Dust Ejection Valve
Check the dust ejection valve on the air filter every 50 hours. Replace if damaged. The valve should close
when the engine is running for proper operation. Ensure that air filter cover is installed with valve at the
8 o’clock position.
Clean Alternator Cooler Turbine
Clean the alternator cooler turbine every 50 hours. Remove side panel and use compressed air to blow dirt
and debris from fins.
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