Hartzell HC-B3-2 Series Owner's Manual And Logbook page 172

(2) Remove the self-locking nut and spacer from the beta
system rod that protrudes from the pitch change rod and
piston.
(3) Prepare the propeller for removal. Refer to Figures 3-14
through 3-16.
(a) Piston Removal
1 Remove the flexlock nut with Hartzell Propeller
Inc. P/N AST-2917 or a 1 7/16 inch wrench, if
installed.
2 Remove the safety wire from the three link pin
units.
3 Remove the safety screws from the link pin units.
4 Remove the link pin units.
5 Mark the piston and link pins with a felt tip pen
or equivalent, so the piston can be reinstalled in
the same position.
6 Slide the link arms out of the piston slots.
7 Remove the socket head cap screw, jam nut,
and washer from each piston guide rod.
8 Slide the piston off the cylinder.
(b) Spring assembly removal.
1 Remove the ring retention plate screw safety
wire.
2 Remove the ring retention plate screws.
3 Remove the retention plate.
4 Remove the split retainer.
5 Remove the spring assembly from the cylinder.
INSTALLATION AND REMOVAL
Propeller Owner's Manual
139
61-00-39
Page 3-72
Rev. 17 Apr/20