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

Page: 139 / 204

Propeller Owner’s Manual
140
INSTALLATION AND REMOVAL
61-00-40
Page 3-73
Rev. 2 Jun/12
C. Removal of the HC-D2(MV,V)20-7 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.
(1) Propeller Removal
CAUTION: TO PREVENT DAMAGE TO THE BLADE
AND BLADE PAINT, WRAP THE BLADE
SHANKS IN SEVERAL LAYERS OF
MASKING OR DUCT TAPE BEFORE
REMOVING THE SPINNER DOME (IF
INSTALLED).
(a) Spinner dome removal (if installed)
1 Remove the screws and washers that secure the
spinner to the spinner bulkhead.
2 Remove the spinner dome.
(b) On non-governing propellers only, disconnect the
propeller pitch control cable from the hydraulic valve
lever on the long end that extends from the valve
spool.
(c) Remove the hub nut safety pin from the hub nut.
(d) Completely loosen and unthread the hub nut from the
engine shaft threads.
NOTE: 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.
(e) Grip the blade counterweight on each blade clamp
and rotate the blades to high pitch.
(f) Rotate the blades until the push rods that protrude
from the jack plate unit slide out of each of the guide
lug bushings in the hub.