Cummins/Onan 6CTA8.3 — Fuel Pump Control: Convert 240 VAC to 120 VAC
Adjustments · Fuel transfer pump control
For the Cummins/Onan 6CTA8.3, from the Cummins/Onan service manual.
Applies to: Cummins/Onan 6CTA8.3, Cummins/Onan DGBB, Cummins/Onan DGBC, Cummins/Onan DGCA, Cummins/Onan DGCB, Cummins/Onan DGCG, Cummins/Onan DGFA, Cummins/Onan DGFB, Cummins/Onan DGFC, Cummins/Onan 4B3.9 engine, Cummins/Onan 4BT3.9 engine, Cummins/Onan 4BTA3.9 engine
Procedure
- Remove jumpers between TB1-6/TB1-7; connect one jumper TB1-5 to TB1-6 and one TB1-7 to TB1-8.
- Move selector switch S103 on control PCB to up position for 120V.
- If equipped with a transformer, remove jumpers between H2/H3 and connect one between H1-H3 and one between H2-H4.
Full service-parts list: Cummins/Onan DGBB →, Cummins/Onan DGBC →, Cummins/Onan DGCA →, Cummins/Onan DGCB →, Cummins/Onan DGFA →, Cummins/Onan DGFB →, Cummins/Onan DGFC →
Source: Cummins/Onan service 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.