Aircraft Alternator
Maintenance Manual
24-30-01
ES1031
Page: 6-10 Rev.
B: 20 Apr. 2022
© 2022 - Hartzell Engine Technologies - All rights reserved
6.10 Terminal Hardware Removal and Installation
A. Removal
(1) AUX Terminal: Using a thin 3/8 wrench, hold the bottom nut and loosen the top nut as shown in Figure
6.4 AUX Terminal. This is required to prevent the loss of the factory torque of the bottom nut. Remove
and discard lockwasher. Nuts are HET P/N 8X-0173 & lockwasher is HET P/N 12X-0196.
(2) Output Terminal: Using a thin 7/16 in. wrench, hold the bottom nut and loosen the top nut as shown
in Figure 6.4 AUX Terminal. This is required to prevent the loss of factory torque of the bottom nut.
Remove & discard lockwasher. Output nuts are HET P/N 8X-1063. Lockwashers are HET P/N 12X-
0199.
(3) Ground Terminal: Using a thin 3/8 in. wrench, hold the bottom cupped nut and loosen the top cupped nut
shown in Fig. 6.4 Ground Terminal. This is required to prevent the loss of factory torque of bottom nut.
Ground nuts are HET P/N 40298.
(4) Field Terminal(s): Using a thin 5/16 in. wrench, hold the bottom nut and loosen the top nut as shown in
Fig. 6.4 Field Terminal(s). This is required to prevent the loss of the factory torque of the bottom nut.
Remove and discard lockwasher. Field nuts are HET P/N 8X-0140. Lockwashers are HET P/N 12X-
0194.
B. Installation
(1) AUX Terminal: Check bottom nut for a torque of 25 to 30 in-lbs (2.82-3.39 Nm). Place a new
lockwasher, HET P/N 12X-0196 and the existing AUX nut, HET P/N 8X-0173 on the AUX stud. Using
a thin 3/8 inch wrench, hold the bottom nut and tighten the top nut to a torque of 25 to 30 in-lbs (2.82-
3.39 Nm). Refer to Figure 6.4 AUX terminal.
(2) Output Terminal: Check bottom nut for a torque of 70 to 85 in-lbs (7.91-9.60 Nm). Place new lockwasher,
HET P/N 12X-0199 and the existing Output nut, HET P/N 8X-1063 on the Output stud. Using a thin 7/16
(.4375) wrench, hold the bottom nut and tighten the top nut to a torque of 70 to 85 in-lbs (7.91-9.60 Nm).
Refer to Figure 6.4 Output terminal.
(3) Ground Terminal: Check bottom nut for a torque of 25 to 30 in-lbs (2.82-3.39 Nm). Place existing Ground
cupped nut, HET P/N 40298 on the Ground stud. Using a thin 3/8 inch wrench, hold the bottom cupped
nut and tighten the top cupped nut to a torque of 25 to 30 in-lbs (2.82-3.39 Nm). Refer to Figure 6.4,
Ground Terminal.
(4) Field Terminal(s): Check bottom nut for a torque of 12 to 15 in-lbs (1.36-1.69 Nm). Place new
lockwasher, HET P/N 12X-0194 and the existing Field nut, HET P/N 8X-0140 on the Field stud. Using
a thin 5/16 in. wrench, hold the bottom nut and tighten the top nut to a torque of 6 to 8 in-lbs (0.68-0.90
Nm). Refer to Figure 6.4, Field Terminal.
