Cummins/Onan — Mounting the Belt Drive Generator

Installation · Self-adjusting mounting base

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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Procedure

1. Bolt upper slide rails to generator mounting base using four 1/2 inch machine screws, nuts and lock washers; insert screws from bottom.
2. Apply ordinary bearing or axle grease lightly to mating surfaces of upper and lower sliding rails.
3. Place one spring bracket over rear mounting hole of lower slide rail and bolt in place.
4. Hook heavy spring into remaining hole of spring bracket.
5. Bolt lower slide rail pieces in place.
6. Fit upper slide rails into lower rails and push generator into position so the heavy spring hook lines up with the mounting bolt on the pulley end.
7. Hook remaining spring bracket into heavy spring and secure under generator mounting bolt nut after placing flat spacer washer 3/8 inch thick over the bolt.
8. Install belt on pulley and move tractor to apply belt tension; proper tension when ends of upper and lower slide rails line up.

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.

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