Propeller Maintenance; Propeller Removal - Thrush Aircraft S2RHG-T65 TURBO THRUSH Maintenance Manual

THRUSH AIRCRAFT, INC – MODEL S2RHG-T65 TURBO THRUSH
B. Cruise Power . . . Approximately +35° @ 42 inch station
C. Full Feathered Angle . . . 79.0± 0.5° @ 42 inch station
D. Mechanical Reverse Pitch Stop . . . -11°± 0.5° @ 42 inch station
E. Angle at which servo piston just touches the three low pitch stop rod beta nuts
(which move the propeller beta feedback ring) is 10.0°± .1° when blades are held
toward decrease position at the 42 inch station. The hydro-mechanical low pitch
stop occurs at a blade angle of approximately 11° when the propeller dome has
traveled sufficiently to fully close the beta valve and shut off the oil flow to the
propeller.
F. The specific low-pitch blade-angle determined through aircraft flight and ground
test, during which the controllability of the aircraft is checked, is approximately
11° for the Hartzell propeller installed on the Turbo Thrush.
G. The way to set the specific low-pitch blade-angle is to adjust the hydraulic low
pitch stop. This is accomplished by proper adjustment of the three beta nuts, by
using the 1600-RPM Np Torque Setting Chart (Figure 4-5).
A. Remove the forward cowl from the engine.
B. Remove the spinner dome by removing the attaching screws from around the
rear circumference.
C. Disconnect the front fork-end from the propeller-reversing lever. Disconnect the
pivot bolt securing the reversing lever to the propeller governor actuating lever
and lift the reversing lever free of the collar prior to pulling the low pitch stop
collar fully forward.
The procedures in the step above must be accomplished to
avoid damaging the propeller governor.
D. Install the feedback ring-puller and pull the low pitch stop collar fully forward.
Make sure that the tool is not cocked to avoid damaging the
propeller. Take the precautions necessary to avoid bending
or otherwise damaging the three spring-loaded rods and the
beta feedback ring.
Effective: 05/05/04
AIRCRAFT MAINTENANCE MANUAL

PROPELLER MAINTENANCE

PROPELLER REMOVAL

** CAUTION **
** CAUTION **
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