Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Rotor: Testing and Inspection

ROTOR




1. Measure resistance between slip rings with a ohmmeter. If it is not within standard resistance, replace rotor.

Standard resistance: 3.5 - 4.5 Ohm




2. Check for continuity between slip ring and core with a circuit tester. Replace rotor if there is continuity.
3. If slip ring surface is rough, smooth with a lathe or fine sand paper.