Generac — Drying the Generator
Maintenance · Stator and Rotor windings
From a Generac service manual covering: IM100G, IM80G, NP100G, NP80G. Check it applies to your exact model before use.
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Before you start
- No electrical loads must be applied while drying
Procedure
- Open the generator's main circuit breaker. NO ELECTRICAL LOADS MUST BE APPLIED TO THE UNIT WHILE DRYING.
- Disconnect Wire No. 4 from the Voltage Regulator.
- Provide an external source to blow warm, dry air through the generator. DO NOT EXCEED 185° F. (85° C.).
- Start the generator and let it run for 2 or 3 hours.
- Stop the engine and retest Stator and Rotor insulation for breakdown.
Tools required
- Megohmmeter or hi-pot tester Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Do not exceed 185° F. (85° C.)
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.