Hartzell HC-D2MV20-3 Series Owner's Manual And Logbook page 136

B. Removal of the HC-D3(MV,V)20-6L Propeller Assembly
CAUTION:
(1) Propeller Removal
(a) Disconnect the reverse pitch control cable from the
hydraulic valve lever on the short end that extends
from the valve spool.
(b) Disconnect the propeller pitch control cable from the
hydraulic valve lever on the long end that extends
from the valve spool.
(c) Remove the lock nut from the threaded end of each
push rod.
(d) Remove the washer from the threaded end of each
push rod.
(e) Remove the hub nut safety pin from the hub nut.
(f) Completely loosen and unthread the hub nut from the
engine shaft threads.
NOTE:
(g) Grip the blade counterweight on each blade clamp
and, at the same time, rotate the blades to high pitch.
(h) Rotate the blades until the push rods that protrude
from the jack plate unit slide out of each of the guide
collar bushings.
(i) Rotate the jack plate and push rods until each fork
disengages from each clamp link screw and pitch
change block.
INSTALLATION AND REMOVAL
Propeller Owner's Manual
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.
Because the hub nut is pulling the propeller
hub off the tapered rear cone, there will be
significant resistance to the loosening of
the shaft nut.
140
61-00-40
Page 3-70
Rev. 2 Jun/12