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3.3.1
REPLACEMENT PROCEDURE
1.
Before starting this operation, verify that the engine's ignition key and push‐button are in OFF position
and that all the breakers are switched OFF;
2.
Release the 6 bolts pn 284 that fix the propeller pn 125 to the flange of the engine and remove the
propeller;
3.
Remove the pulley pn 124 by withdrawing it from the bushes of the engine flange;
4.
Remove the belts pn A28 from the pulley of the pre‐rotation assembly pn 117;
5.
If there are more than 2 space washers 6x18 (used to shim the pre‐rotation assembly pn 117) under each
bolt (M6x30), these need to be removed so as to allow enough slack between the belts and pulleys and
avoid unwanted coupling; otherwise proceed as described in points 10‐13 and following ones;
6.
Loosen the 4 bolts M6x30 that fix the pre‐rotation assembly pn 117 to the support pn 120;
7.
Lift the pre‐rotation assembly pn 117 and remove the spacer washers 6x18 in excess;
8.
Reposition the pre‐rotation assembly pn 117 on the support pn 120 and insert the locking bolts M6x30;
9.
Tighten the nuts M6 to the bolts so as to friction the movements of the pre‐rotation assembly on the
support.
10.
Position the new pulley pn 124 on the flange of the propeller and verify that it rests on the entire surface
of the flange;
11.
Using a ruler (see fig. 3.2.5, point 1), verify the alignment between the pulley pn 124 and the pulley of the
pre‐rotation assembly pn 117;
12.
Tighten the locking bolts M6x30 completely and make sure that the fibrelock nuts M6 work correctly. It is
recommended to change the nuts M6 so as to guarantee a correct braking effect.
13.
Fit the new belts pn A28. Thereby take care not to invert them, as each belt is run in on its pulley so that
it impresses its own groove in the pulley;
14.
Completely screw in the adjuster pn 127 of the pre‐rotation cable's sheath pn 104;
15.
Reposition the brake shoe (1) of the belts pn A28 by slackening the bolt M5x40 and placing it on the mid
point of the slot;
PAGE
42
M16 (C) TANDEM TRAINER
MAINTENANCE MANUAL
ISSUE
A_November 2012
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