Cummins/Onan 1400 / 2.0UF-232S/32 — Testing the Armature for an Open Circuit
Testing & diagnosis · Armature / commutator
For the Cummins/Onan 1400 / 2.0UF-232S/32, from the Cummins/Onan operator's manual.
Applies to: Cummins/Onan 1400
Procedure
- Place the armature in the growler which is connected to alternating current.
- Rub a smooth steel blade (back edge of a hacksaw blade) across the segments of the commutator.
- A spark should occur as the blade contacts two adjacent segments, indicating the circuit is complete.
- Rotate the armature just enough to test the next two segments and continue until tested completely around.
- If no spark occurs, the winding between those two segments is open circuited.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Cummins/Onan 1400 →
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.