Cummins/Onan 1400 / 2.0UF-232S/32 — Testing the Armature for Short Circuits
Testing & diagnosis · Armature laminations
For the Cummins/Onan 1400 / 2.0UF-232S/32, from the Cummins/Onan operator's manual.
Applies to: Cummins/Onan 1400
Before you start
- Do not test for magnetism at just one point of the armature laminations.
Procedure
- Place the armature in the growler which is connected to alternating current.
- Hold a steel knife blade (or hacksaw blade) 1/4 inch from the armature laminations.
- If the steel blade is attracted to any magnetized armature laminations, either the armature windings or commutator is short circuited.
- Test all of the armature laminations, from one side over to the other side.
- After testing in one position, revolve the armature about 1/8 revolution and test for magnetism again.
- Continue revolving and testing until the armature has been tested completely around.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Blade held 1/4 inch from laminations
- Revolve armature about 1/8 revolution between tests
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.