Hartzell HC-D2MV20-3 Series Owner's Manual And Logbook page 122

(d) Install the hydraulic valve assembly on the piston with
a gasket and two screws (Table 3-1).
(e) Using a No. 51 drill, drill through the side of the
valve housing and through the heads of the two
A-2038-( ) screws. Safety with 0.032 inch (0.81 mm)
safety wire. Refer to Figure 3-8.
(f) Install the gasket.
1 Align the clearance holes of the A-181 gasket
with the six mounting studs that protrude from the
engine and install the gasket flush against the
engine case.
2 Install one O-ring (Table 3-1) around each
mounting stud, flush against the gasket.
(g) Install the cylinder
1 Align the six cylinder mounting holes with the six
mounting studs that protrude from the engine
case and position the cylinder flush against the
previously installed gasket.
CAUTION 1:
CAUTION 2:
2 Install one mounting nut (Table 3-1) on each of
the six studs to secure the hydraulic cylinder to
the engine.
3 Torque each nut in accordance with Table 3-2.
INSTALLATION AND REMOVAL
Propeller Owner's Manual
140
CHECK THE HEIGHT OF THE
STUDS ABOVE THE INSIDE
SURFACE OF THE CYLINDER.
THE HEIGHT MUST NOT EXCEED
0.532 INCH (13.51 MM) OR PISTON
TRAVEL MAY BE LIMITED AND
MAY RESTRICT BLADE ANGLE
TRAVEL. IF THE STUDS ARE TOO
LONG, REMOVE THE CYLINDER
AND GASKET AND SHORTEN
THE STUDS. REPEAT ALL
INSTALLATION STEPS.
THE HEIGHT OF THE STUDS
ABOVE THE INSIDE SURFACE
OF THE CYLINDER MUST NOT
BE LESS THAN 0.468 INCH (11.89
MM) OR MOUNTING NUT WILL
NOT HAVE ENOUGH THREAD FOR
ENGAGEMENT.
61-00-40
Rev. 3 Feb/14
Page 3-58