Propeller Owner's Manual
140
TESTING AND TROUBLESHOOTING
61-00-40
Page 4-7
Rev. 2 Jun/12
(3) If the valve lever stop is not controlling the travel of the
push pull control because it is limited in the cockpit,
correct using the following steps:
(a) Loosen the control housing clamp next to the valve.
(b) Move the control housing toward the propeller until
the stop on the lever limits the lever movement.
(c) Adjust the stop to achieve proper static RPM.
D. Static RPM too low - HC-D3(MV,V)20-6L Propeller Model
(1) Adjust the stop that controls the valve lever travel so the
proper RPM is obtained.
(2) Start and warm up the engine and check propeller action.
(a) The full throttle maximum static rpm, with cockpit
propeller control full forward, should be held to the
limits listed in the Aircraft Type Certificate Data
Sheet.
(3) Stop the engine and back off on the low pitch stop screw.
(a) For -6 models, the screw adjusts directly against the
valve body.
(4) Run the engine up. If the static RPM is still low, stop the
engine and further adjust the low pitch stop screw.
CAUTION:
NEVER OPERATE THE PROPELLER
WITH THE JACK PLATE AGAINST THE
SHOULDER. THE MINIMUM CLEARANCE
IS 0.120 INCH (3.05 MM).
(5) If no more adjustment of the low pitch stop screw is
available, and the jack plate is against the shoulder of the
hub, perform the following steps:
(a) Remove the propeller and add shims, as required,
between the rear cone and the engine to attain a
lower pitch.
(b) Reset the blade pitch approximately one degree, or
0.031 inch (0.78 mm) for each 100 RPM desired.
(6) If the valve lever stop is not controlling the travel of the
push pull control because it is limited in the cockpit,
loosen the control housing clamp next to the valve and
move the control housing toward the propeller until the
stop on the lever limits the lever movement. Adjust the
stop to achieve proper static RPM.
Summary of Contents for HC-D2MV20-3 Series
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