Generac 9344 — Testing Rotor Insulation
Testing & diagnosis · Rotor winding
For the Generac 9344, from the Generac service manual.
Applies to: Generac 9344
Before you start
- Rotor must be completely isolated from the voltage regulator; brush wires No. 1 and 4 must not touch any part of frame during the test.
Procedure
- Make sure brushes and brush holders are removed and rotor is isolated from ground and other components.
- Disconnect excitation leads No. 1 and 4 from the brushes.
- Connect red test lead to the positive (+) slip ring nearest the rotor bearing.
- Connect tester black lead to a clean frame ground on the rotor.
- Set tester Voltage switch to 500 volts; turn tester ON and check Pilot lamp.
- Set Voltage switch to 1250 volts; wait one second, then turn tester OFF.
Tools required
- Hi-Pot tester or megohmmeter Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Apply voltage for one second only
Full service-parts list: Generac 9344 →
Source: Generac 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.