Hartzell HC-D2MV20-3 Series, Owner'S Manual And Logbook

Page: 150 / 204

Propeller Owner's Manual
140
TESTING AND TROUBLESHOOTING
61-00-40
Page 4-6
Rev. 2 Jun/12
(d) Governor Maximum RPM Stop Setting
1 Increase the maximum RPM stop screw of the
governor by one turn.
2 Advance the propeller RPM control to maximum
RPM and reduce the control by one inch
(25 mm).
3 Set the brakes and chock the wheels of the
aircraft, or tie the aircraft down.
4 Start the engine.
5 Slowly advance the throttle to maximum manifold
pressure.
6 Slowly advance the propeller control lever until
the engine speed stabilizes.
7 If the engine speed stabilizes at a higher RPM
than it was previously running, then the governor
maximum RPM stop setting is incorrectly set.
a Make additional fine adjustments to the
governor maximum RPM stop setting until
the rated maximum RPM is reached.
b If engine speed stabilizes above or below the
rated RPM, the low pitch stop may require
adjustment. Refer to the Maintenance
Practices chapter of this manual.
C. Static RPM too low - HC-D2(MV,V)20-3 Propeller Model
(1) Stop the engine.
CAUTION:
NEVER OPERATE THE PROPELLER
WITH THE JACK PLATE AGAINST THE
SHOULDER. THE MINIMUM CLEARANCE
IS 0.012 INCH (0.30 mm).
(2) If no more adjustment of the low pitch stop screw is
available, check to determine if the jack plate is against
the shoulder of the hub.
(a) Correct by removing the propeller and adding or
removing shims, as required, between the rear cone
and the engine to attain a lower pitch.
NOTE: Removing shims will increase engine
RPM. Installing shims will decrease engine
RPM.