eng251ine
New member
- 12
- 1
- 3
- Location
- Frederick, MD
New to me 806B. 199hrs on clock. Added fluids, starts and runs well. Configured board and switch for 120/208v operation and frequency selector switch is in the 60hz/400hz position.
CIM displays 54hz upon startup, frequency adjust toggle has no impact on output - up or down. Verified CIM display accurate with known good DMM. No other errors displayed.
Things I've done:
Any ideas would be greatly appreciated.
CIM displays 54hz upon startup, frequency adjust toggle has no impact on output - up or down. Verified CIM display accurate with known good DMM. No other errors displayed.
Things I've done:
- Worked through the Speed Control Unit Adjustment Procedure as posted in another 806B forum. Speed Trim, Gain, Stability adjustment have no impact on frequency or detectable change in engine speed.
- Removed Mag Pickup to verify it was clean, found a small nick in the pick up. Replaced with new pickup and adjusted to 1.25v output as directed in TM
- Removed Electro Mechanical Control to check operation of linkage reinstalled correctly with positive linkage engagement - no change to operation
- Verified Electro Mechanical Control working (i.e. moving), not sure if working properly
- Checked throttle linkage inside injector pump for movement and binding, appears normal
- Tried adjusting low speed throttle adjustment on injector pump, no detectable change in operation
- Removed backplane and cleaned contacts
Any ideas would be greatly appreciated.