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

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Propeller Owner's Manual
140
TESTING AND TROUBLESHOOTING
61-00-40
Page 4-8
Rev. 2 Jun/12
E. Maximum RPM (Static) is High (Governing Propeller)
(1) Engine power is high
(a) Follow the aircraft POH and/or AMM recommended
engine checks to determine if the engine power is
high.
(b) If the engine power is high, refer to an appropriately
licensed engine repair station or to the engine
manufacturer.
(c) If the engine power is within acceptable limits,
examine the maximum RPM stop setting of the
governor.
F. Static RPM too high - HC-D2(MV,V)20-3 Propeller Model
(1) Start and warm up the engine and check propeller
action. The full throttle maximum static rpm, with cockpit
propeller control full forward, should be held to the limits
listed in the Aircraft Specification.
(2) Reduce the propeller RPM with the propeller control until
the correct RPM is obtained.
(3) Stop the engine.
(4) Adjust the propeller low pitch stop screw that limits valve
lever travel and is attached to the hydraulic cylinder.
NOTE: On -6 models the low pitch stop screw adjusts
directly against the valve body.
G. Static RPM too high - HC-D3(MV,V)20-6L Propeller Model
(1) Start and warm up the engine and check propeller
action. The full throttle maximum static rpm, with cockpit
propeller control full forward, should be held to the limits
listed in the Aircraft Specification.
(2) Reduce the propeller RPM with the propeller control until
the correct RPM is obtained.
(3) Stop the engine.
(4) Adjust the propeller low pitch stop screw that limits valve
lever travel and is attached to the hydraulic cylinder.