Propeller Owner’s Manual
139
INSTALLATION AND REMOVAL
61-00-39
Page 3-8
Rev. 17 Apr/20
3. Propeller Mounting Hardware and Torque Information
(Rev. 1)
A. Propeller Mounting Hardware
(1) Refer to Table 3-1 for part numbers of the propeller
mounting hardware and O-rings.
B. Torque Information
(1) The structural integrity of joints in the propeller that are
held together with threaded fasteners is dependent upon
proper torque application.
(a) Vibration can cause an incorrectly tightened fastener
to fail in a matter of minutes.
(b) Correct tension in a fastener depends on a variety
of known load factors and can influence fastener
service life.
(c) Correct tension is achieved by application of
measured torque.
(2) Use accurate wrenches and professional procedures to
make sure of correct tensioning.
(3) Refer to Table 3-2 for the torque values to use when
installing a Hartzell propeller.
(4) When an adapter is used with a torque wrench, use the
equation in Figure 3-1 to determine the correct torque
value.
(5) Refer to Figure 3-2 for the proper torquing sequence of
the propeller mounting bolts/nuts.
