Cummins/Onan 20W-20 — R O T A T E F A C E G E A R U N T I L

For the Cummins/Onan 20W-20.

Applies to: Cummins Onan 20W 20

Procedure

1. Install No. 12 timing button in PSU pump as previously discussed under preparation for pump installation. Remove delivery valve cap and holder; take out spring and replace holder and cap. Figure 31.
2. Remove No. 1 injector line; re-install line with top end of line in pump outlet so other end will direct fuel flow into an open container.

Source: manual:974-0251 Onan RDJF Engine Service and Parts Manual (3-1980).pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.