Cummins/Onan — © With Clean Filter ....

For these Cummins/Onan models: K19, K19 Series, KT19, KTA19, KTTA19.

Applies to: Cummins Onan K19 Series, Cummins Onan Kt19, Cummins Onan Kta19, Cummins Onan Ktta19

Procedure

1. 100 mm Hg [4 in Hg]
2. 200 mm Hg [8 In Hg]

Source: manual:Cummins Diesel KTA19 Manual 1994.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.