Cummins/Onan 12.5 RDJC / 15.0 RDJC — Charge Rate Adjustment
Adjustments · Charging resistor
For the Cummins/Onan 12.5 RDJC / 15.0 RDJC, from the Cummins/Onan operator's manual.
Applies to: Cummins/Onan 12.5 RDJC, Cummins/Onan 15.0 RDJC, Cummins/Onan RDJC
Before you start
- Avoid overcharging the battery
- Do not smoke or allow any flame, sparks, or arc-producing devices in the battery area
Procedure
- Locate the adjustable resistor slide tap in the charging circuit, found in the generator air outlet.
- If necessary, increase the charging rate slightly by moving the slide tap up.
- Make small increments of change until the proper rate has been determined.
- Adjust this slide tap only when the engine is stopped.
Specs & values
- The adjustable resistor slide tap is set to produce a 2 ampere charging rate
- Battery charge rate 2 to 5 amps (adjustable)
Full service-parts list: Cummins/Onan RDJC →
Source: Cummins/Onan operator'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.