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IO-390-D Series Engine Maintenance Manual
IO-390-D Series Engine Maintenance Manual
6. Alternator Belt Replacement
A. Alternator Belt Removal
(1) Remove the safety wire from both bolts on
the alternator adjusting link (Figure 4).
(2) Loosen the bolt that attaches the alternator
adjusting link to the alternator (Figure 5).
(3) Loosen the bolt that attaches the alternator
adjusting link to the crankcase (Figure 5).
(4) Rotate the alternator on the bracket
towards the starter ring gear.
(5) Remove the alternator belt from the
alternator pulley and the starter ring gear
(Figure 6).
B. Alternator Belt Installation
(1) Install the alternator belt in the alternator belt groove on the starter ring gear support.
(2) Install the alternator belt in the groove on the alternator pulley (Figure 6).
(3) Adjust the alternator belt tension. Refer to the "Alternator Belt Tension
Check/Adjustment" procedure in this chapter.
(4) Torque the bolts that attach the alternator adjusting link to the alternator and to the
crankcase to (Figure 5) to 17 ft.-lb. (23 Nm).
(5) Install new safety wire/cable on the two bolts on the alternator adjusting link as shown in
Figure 4.
7. Starter Replacement
A. Starter Removal
(1) Disconnect all power to the
engine.
(2) Remove electrical leads from the
starter. Refer to the airframe
manufacturer's manual.
(3) Hold the starter and remove the
four nuts and lock washers
(Figure 7) from the studs on the
mounting face for the starter.
Discard the lock washers.
(4) Remove the starter from the
studs on the engine.
© 2020 Avco Corporation. All Rights Reserved
March 2020
Figure 6
Alternator and Alternator Belt
Figure 7
Starter
72-70
Page 247
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