CHAPTER 24
PAGE 14
PAGE DATE: 21. March 2014
MAINTENANCE MANUAL EXTRA 300LT
3 Remove Propeller according to MT Operation and Installa-
tion Manual E-124 (see Chapter 1).
4a (Bosch) Remove cotter pins at castle nuts (2 & 3, Figure 1)
and safety wire at bolt (1).
4b (Prestolite) Remove cotter pin at castle nut (7, Figure 1)
and safety wires at bolts (4 & 5).
4c (Plane Power) Remove safety wires at bolts (8 & 9, Figure
3).
5a (Bosch) Slightly loosen bolt (1) and castle nuts at bolts
(2 & 3) to release drive belt tension.
5b (Prestolite) Slightly loosen bolts (4 & 5) and castle nut (7)
to release drive belt tension.
5c (Plane Power) Slightly loosen bolts (8 & 9) and stop nut at
bolt (10) to release drive belt tension.
6 Rotate the alternator clockwise around bolt connection (3, 6
or 10)).
7 Detach belt from the alternator pulley.
8 Remove starter ring gear according to applicable Lycoming
installation manual (see Chapter 1).
9 Remove belt.
10 Install in reverse sequence of removal. Refer to Chapter 20-
10-03 for torque values of bolt connections.
11 Apply a proper tension to the drive belt by counter-clockwise
rotating the alternator around bolt connection (3, 6 or 10,
Figure 3).
12 Check tension of the drive belt and adjust for new drive belt
per next paragraphs.
13 Check drive belt tension after the first 1 to 1.5 hours of
operation and then after 8 hours of operation and adjust for
used drive belt per next paragraphs.
Tension Check
I M P O R T A N T An improperly tensioned alternator drive belt can slip,
wear prematurely, and reduce electrical output of the
alternator.
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