Propeller Owner's Manual
136
TESTING AND TROUBLESHOOTING
61-00-36
Page 4-4
Rev. 2 Feb/17
C. Beta Range Operation Check
(1) Select maximum RPM with the governor RPM control.
(2) Increase the engine power (throttle) slowly until reaching
1200 to 1400 RPM.
(3) At the pressure control unit, the oil pressure value on
the oil pressure gauge must be the same Position 3 oil
pressure as previously obtained through adjustment in
the "Installation and Removal" chapter of this manual.
(a) For Position 3 oil pressure, refer to Figure 3-16 in the
Installation and Removal chapter of this manual.
(4) Reduce the engine power (throttle) to get less than
850 RPM.
(5) Use the pilot control that is connected to the pressure
control unit to move the propeller blade angle into beta
range and make sure of reverse and low positive pitch
operation.
(a) Refer to the section "Pilot Operation of Propeller
Blade Angle in Beta Range (Low Pitch to Full
Reverse Pitch) for Maneuvering" in the Description
and Operation chapter of this manual.
(b) For a schematic representation of the pilot control,
refer to Figure 2-2 in the Description and Operation
chapter of this manual.
(6) Return the pilot control that is connected to the pressure
control unit to the low pitch position for positive pitch
governed operation.
D. Governor Operation Check
(1) Select maximum RPM with the governor RPM control.
(2) Increase engine power (throttle) to get maximum RPM.
(3) Make sure of governor control of engine/propeller RPM.
(a) If maximum RPM was not reached because of
insufficient power, then slightly decrease the RPM
control and make sure of governor control (decrease
of RPM caused by the governor).
