Cummins/Onan — Reversing the Scroll
Adjustments · Blower scroll
From a Cummins/Onan owner's manual covering: 4UF-3N41, 4UF-3N42, 7UF-3N41, 7UF-3N42, 7UF-3N61. Check it applies to your exact model before use.
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Before you start
- The gear drive generator rotation must not be reversed.
Procedure
- Remove only the scroll with screen attached.
- Turn it end for end and reinstall so the scroll will be at the opposite end of the air outlet hole.
- Run the generator and check for a strong flow of exhausted air for proper cooling.
Specs & values
- Arrow on scroll must point in direction of rotation of generator shaft
Source: Cummins/Onan owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.