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

Page: 73 / 204

Propeller Owner’s Manual
140
INSTALLATION AND REMOVAL
61-00-40
Page 3-9
Rev. 2 Jun/12
C. Installing the HC-D2(MV,V)20-3 Propeller Assembly
CAUTION: INSTRUCTIONS AND PROCEDURES IN
THIS SECTION MAY INVOLVE PROPELLER
CRITICAL PARTS. REFER TO THE
INTRODUCTION CHAPTER OF THIS
MANUAL FOR INFORMATION ABOUT
PROPELLER CRITICAL PARTS. REFER TO
THE ILLUSTRATED PARTS LIST CHAPTER
OF THE APPLICABLE OVERHAUL
MANUAL(S) FOR THE IDENTIFICATION OF
SPECIFIC PROPELLER CRITICAL PARTS.
Refer to Figure 2-2 for part identification and location.
(1) Hydraulic Valve Installation.
(a) If not previously installed, install the hydraulic valve
assembly (Figure 3-1) on the piston with a gasket and
two screws (Table 3-1).
(b) 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 3-1).
CAUTION:
THE HOSE MUST BE LONG
ENOUGH TO ALLOW THE VALVE
TO MOVE FREELY WITH THE
PISTON THROUGH ITS FULL
TRAVEL.
(c) Secure the control cable clamping bolt tightly against
the bracket on the cylinder.
NOTE: There should be an increase in cable
tension when moving the cockpit reverse
control into the locked position (slack is
taken up in the cable).
(d) Perform the following three adjustments:
1 Bottom the piston in the cylinder.
2 Pull the propeller control (for pitch and RPM
control) handle out approximately 2.25 inches
(57.1 mm) from the instrument panel.
3 Locate the valve spool midway between the cotter
pin and the base of the guide pin.