Cummins/Onan 6CTA8.3 — Fuel Pump Control: Convert 120 VAC to 240 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 TB1-5/TB1-6 and TB1-7/TB1-8; connect two jumpers between TB1-6 and TB1-7.
- Move selector switch S103 on control PCB to down position for 240 VAC.
- If equipped with a transformer, remove jumpers between H1/H3 and H2/H4 and connect two jumpers between H2 and H3.
- Attach a tag to the control box indicating the supply voltage.
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.