BRP-Rotax
Maintenance Manual
Effectivity 912/914 Series
Edition 1 / Rev. 0
72-00-00
page 51
May 01/2007
d02622
3.9.14) Disc spring pre-tension adjustment
See Figs. 72-53 and 72-25 (see Section 72-00-00 / 3.9.4).
When the propeller shaft assembly is uncompressed, the contact
surface (24) for the ring halves must lie in the groove of the propeller
shaft 1 mm (0.039 in.) over the upper edge (25). The difference must
be compensated for by placing compensating shims (26) between
eccenter (14) and step collar (15).
â—† NOTE: To facilitate adjustment, they can first be pushed apart
until the top edge (25) of the contact surface (24) for the
ring halves slips into the groove in the propeller shaft
and a 1 mm (0.039 in.) compensating shim (26) can be
inserted between step collar (15) and eccenter (14).
After completing the adjustment of the disk spring travel, depress dog
gear (2) with mounting yoke, part no. 876885, until both ring halves can
be inserted. Insert ring halves and relieve the springs, see 72-00-00
sec. 3.9.4.
â– CAUTION : If the spacing is insufficient, never press the springs
onto the block, as this will cause dog gear to collide with
the gear cover.
â– CAUTION : The ring halves must be completely inserted in the
groove on propeller shaft!
Check that the ring halves are positioned correctly.
â—† NOTE: With correct spacing, minimum permissible friction
torque is 25 Nm (18.5 ft.lb) and maximum permissible
friction torque 60 Nm (44.3 ft.lb), see 72-00-00 sec. 4.
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