IO-390-D Series Engine Maintenance Manual
72-60
© 2020 Avco Corporation. All Rights Reserved
Page 242
March 2020
IO-390-D Series Engine Maintenance Manual
B.
Propeller Governor Drive Installation
(1)
Lubricate the propeller governor drive gear with engine oil mixture.
(2)
Install the gear into propeller governor drive assembly. Refer to Figure 2.
Figure 2
Propeller Governor Driven Adapter Assembly
(3)
Install the pin (Figure 1) in the propeller governor drive assembly (if removed).
(4)
Install the propeller governor drive adapter assembly in the accessory housing with a new
accessory drive adapter gasket (Figure 1).
(5)
Install the four nuts on the studs with washers and new lock washers. Torque the nuts to
17 to 19 ft.-lb. (23 to 26 Nm).
(6)
If studs are installed in the propeller governor driven adapter assembly (Figure 1):
(a)
Install the propeller governor or propeller cover with a new governor gasket on the
propeller governor drive assembly.
(b)
Install the four nuts on the studs with washers and new lock washers. Torque the nuts
to 17 to 19 ft.-lb. (23 to 26 Nm).
(7)
If studs are not installed in the propeller governor drive adapter assembly (Figure 1):
(a)
Examine the Heli-Coil
®
inserts in the propeller governor drive adapter assembly.
Replace damaged Heli-Coil
®
inserts.
(b)
Install the propeller governor or propeller governor cover with a new governor gasket
on the propeller governor drive assembly.
(c)
Install the four bolts with washers and new lock washers. Torque the nuts to 17 to 19
ft.-lb. (23 to 26 Nm).
