Generac 91401256S / Bsc 556 — Drying the Generator
Maintenance · generator windings
For the Generac 91401256S / Bsc 556, from the Generac service manual.
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Before you start
- When using solvents, provide adequate ventilation. Fire, explosion, and health hazards exist.
Procedure
- If insulation resistance is below safe value, dry electrical components before operating.
- Enclose generator with covering and use heating units to raise temperature 15-18°F (8-10°C) above outside temperature.
- Leave hole at top of enclosure to allow moisture to escape.
- Alternatively, use portable forced air heaters directed into generator air inlet openings.
- Run unit at no-load with voltage regulator removed.
- Heat at point of entry should not exceed 150°F (66°C).
- For oven drying, bake at temperature not exceeding 194°F (90°C), removing voltage regulator and electronics.
- For short circuit method, follow all steps and safety precautions strictly.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 15-18°F above outside
- 150°F maximum forced air
- 194°F maximum oven
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.