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

Page: 119 / 204

Propeller Owner’s Manual
140
INSTALLATION AND REMOVAL
61-00-40
Page 3-55
Rev. 3 Feb/14
(d) Shut off the engine and adjust the low pitch stop
screw in the tab of the valve link to just contact the
valve spool.
(e) Adjust the jam nut to lock the low pitch stop screw in
place.
(f) Start the engine and cycle the propeller pitch control
to a higher pitch and then back to lowest pitch to
make sure the maximum RPM static on the ground
is not exceeded.
(g) Repeat the low pitch stop screw adjustment
procedure until the maximum RPM is not exceeded.
CAUTION: CLEARANCE BETWEEN THE JACK
PLATE AND THE HUB RING OR ANY
PART OF HUB MUST BE MAINTAINED
TO PREVENT EXCESSIVE LOADING
OF THE JACK PLATE-TO-PISTON
THRUST BEARING AND PREMATURE
FAILURE. EXCESSIVE LOAD ON
THE ENGINE NOSE CASE THRUST
BEARING WILL ALSO RESULT.
(h) Verify that the jack plate is maintaining a correct
distance away from the ring encircling the hub and
on the engine side of the blade arms.
(i) After running the engine at maximum static RPM,
shut the engine down
(j) With the engine stopped, pull the propeller control all
the way out.
(k) Check the clearance between the jack plate and
the ring encircling the hub on the engine side of the
blase arm. The clearance must be a minimum of
0.06 inches (1.5 mm) and a maximum of 0.12 inches
(3.0 mm) for Lycoming engines and exactly 0.12
inches (3.0 mm) for Continental engines.
CAUTION: DO NOT ALLOW THE HUB NUT TO
ENGAGE LESS THAN FIVE FULL
THREADS.
(l) Adjust the spacers behind the rear cone to obtain
the applicable clearance. Do not allow the hub nut to
engage less than five full threads. Restrict the travel
to maintain no less than clearance.