Hartzell HC-D2MV20-3 Series Owner's Manual And Logbook page 112

CAUTION:
(l) Install the piston and jack plate unit over the cylinder
and clock the piston to the cylinder by aligning a
number stamped on the piston with a number stamped
on the cylinder.
(m) Align the appropriate holes in the piston with the guide
rods in the cylinder.
(n) Install the jack plate unit and piston assembly on the
piston guide rods and against the diaphragm.
(o) Install the hydraulic valve. Refer to Figure 3-8.
1 Connect the link with the tab and screw attached
to the hydraulic piston.
2 Insert the screw (Table 3-1) in the large hole in the
link at the end farthest away from the valve and
tab.
3 Install the screw into the piston and torque in
accordance with Table 3-2.
4 Safety wire the screw by wrapping 0.032 inch
(0.81 mm) minimum diameter stainless steel wire
around the link. Then safety wire the two screws
together with 0.032 inch (0.81 mm) minimum
diameter stainless steel wire.
5 Install a 0.37 to 0.50 inch (9.5 to 12.7 mm) inside
diameter (ID) flexible hose with a minimum
pressure capacity of 150 psi from the engine
oil pressure pump supply to the hydraulic valve.
Connect the hose to the threaded hole in the valve
closest to the engine (pressure supply port).
INSTALLATION AND REMOVAL
Propeller Owner's Manual
140
DO NOT APPLY GREASE TO THE
EXPOSED SURFACE OF THE
DIAPHRAGM. GREASE ON THIS
SURFACE WILL ATTRACT ABRASIVE
MATERIAL HASTENING FAILURE
AND CAUSING LEAKAGE OF THE
DIAPHRAGM.
61-00-40
Rev. 3 Feb/14
Page 3-48