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3.5.3
ROTOR HEAD DISASSEMBLY
(See Fig. 3.5/1 ‐ 3.5/2)
WARNING DANGER:
Carefully follow the instructions. Magni Gyro is not responsible for damages caused by changes and/or
modifications that are either unforeseen or done with non‐original parts.
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.
To facilitate the disassembly of the rotor head, put the control stick (2) in all‐forward position;
3.
Unscrew and remove the two bolts M6x16 that fix the sheath pn 119 of the flexible shaft to the pre‐
rotator pn 117 (use a 10 mm wrench);
4.
4Extract the sheath pn 119 and the flexible shaft pn 118 from the endings on the rotor head pn 039 and
pn 040;
5.
Loosen the rotor brake cable pn 1,5x3900 from the cable retainer pn 202 of the brake lever pn 201 (use a
10 mm wrench);
6.
Extract the cable pn 1,5x3900 of the rotor brake from the sheath retainer pn 200 of the rotor head;
7.
Mark the fastening position of the trim spring pn 109;
8.
Loosen and remove the spring catch pn 110 that fixes the spring pn 109 of the trim (use a 7 mm wrench);
9.
Disconnect the connector of the sensor pn 238 from the cable‐wiring pn 239;
10.
Unscrew and remove the nuts pn MS 20365‐428 of the bolts pn AN4x16A that lock the rod ends pn 034
of the control rods to the rotor head;
11.
Remove the bolts AN14x6A of the rod ends pn 034. Take care not to scratch or damage the paint of the
rods, especially when these get disconnected from the rotor head;
12.
Remove the safety pin pn AN 416‐1 from the longitudinal bolt pn NAS 628‐52;
13.
Unscrew and remove the nut pn MS 21083 N8 of the longitudinal bolt pn NAS 628‐52 of the head;
14.
Holding the rotor head by the fork pn 046 to which the trim spring pn 109 is fixed, extract the bolt NAS
628‐52;
15.
Remove the rotor head from the fork pn 051;
3.5.4
ROTOR HEAD INSTALLATION
(See Fig. 3.5/1 ‐ 3.5/2)
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.
To facilitate the assembly of the rotor head, put the control stick in all‐forward position;
3.
Before installing the rotor head, abundantly grease the bushes pn 053 in which the longitudinal bolt NAS
628‐52 will be inserted;
4.
Put the rotor head in correct position by inserting the upper fork pn 052 into the lower fork pn 051;
5.
Insert the washer pn 12x24 into the bolt NAS 628‐52. Pay attention to put the bevelled part against the
bolt head;
6.
Respecting the direction of insertion along the longitudinal axis, i.e. from rear to front, insert the bolt pn
NAS 628‐52 into the fork pn 051;
7.
Take the grease in excess that came out while the NAS 628‐52 bolt was inserted and spread it on the
notched gear teeth;
8.
Tighten the nut pn MS 21083 N8 on the bolt NAS 628‐52;
9.
Reposition the control rod ends in the apposite head forks and insert the bolts AN4‐16A with their
washers;
10.
Tighten the bolts AN4‐16A with the nuts pn MS20365‐428, which in any case should be replaced;
11.
Connect the wiring cable pn 239 with the detector pn 238;
12.
Insert the spring catch pn 110 in the apposite hole along the fork pn 046 of the rotor head;
13.
Tighten the spring catch pn 110;
PAGE
48
M16 (C) TANDEM TRAINER
MAINTENANCE MANUAL
ISSUE
A_November 2012
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