Woodward — Governor Compensation Adjustment (Bleed and Stability)
Adjustments
From a Woodward service manual — check it applies to your exact model before use.
Procedure
- Loosen the nut holding the compensation adjusting pointer and set the pointer as far as it will go towards maximum compensation; tighten the nut.
- Open the needle valve two turns ccw.
- Allow the prime mover to hunt for approximately 30 seconds to bleed trapped air.
- Loosen the nut holding the compensation pointer and set the pointer as far as it will go towards minimum compensation; tighten the nut.
- Gradually close the needle valve until hunting stops.
- If hunting does not stop, open the needle valve three to five turns from the closed position and move the compensation pointer up by two marks on the indicator scale; repeat.
- Check governor stability by manually disturbing the governor speed setting; satisfactory when governor returns to speed with only slight overshoot or undershoot.
- Tighten the compensation pointer and install the needle valve access plug and seal washer.
Specs & values
- The needle valve must not be closed completely; normal position is from 1/2 to 3/4 turn open.
Source: Woodward 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.