Hartzell HC-E3YR-7 Owner's Manual page 125

(k) Position 4 at low pitch blade angle must be
determined.
1
2
3
(l) Determine the Position 4 oil pressure:
1
INSTALLATION AND REMOVAL
Propeller Owner's Manual
The objective is to determine what oil pressure
is required to just reach low pitch blade angle
during decreasing blade pitch.
The blade model, counterweights, cylinder
mounted springs, and friction resisting blade
movement will affect the oil pressure required to
reach low pitch blade angle.
The cockpit mounted oil pressure gauge will be
monitored to identify the Position 4 oil pressure.
Before starting the engine, adjust the plunger
stop screw away from the plunger. Refer to
Figure 3-14 or Figure 3-15.
a This will make sure that the oil pressure will
be lower than required.
b With the aircraft static on the ground start
the engine at idle power.
c Select maximum RPM with the governor
RPM control.
d Increase engine power (throttle) slowly until
reaching 1200 to 1400 RPM.
e Now move the pilot control in the cockpit to
push the plunger into the pressure control
unit and get an oil pressure of 100 PSI for
the first effort to determine the Position 4 oil
pressure value.
f Continue increasing engine power (throttle)
slowly to maximum power.
136
61-00-36
Page 3-49
Rev. 2 Feb/17