Rotax RM1 Benutzerhandbuch Seite 91

4.3.2. Exchange and renewal of primary gear on clutch drum
The primary gear (pos. 14) is fixed on the clutch
drum (pos. 12) with a hex. nut (pos. 21) The clutch
drum is also fitted with a mechanical overload clutch.
A professional exchange or renewal of the primary
gear is only possible with the specific holding device
(ROTAX part no. 676 190). Proceed as follows:
Note:
Note:
Seite/page 91/132
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Clamp holding device for primary gear
in a vice. If no ROTAX holding device
is used, protect the primary gear with
aluminium jaws from damage of teeth.
Insert primary gear (pos. 14) in holding
device or clamp it in a vice.
Place copper thrust washer (pos. 17 -
thickness 1 mm / 0,04 in.) on primary
gear.
Fit clutch drum (pos. 12).
Place copper thrust washer (pos. 18 - thickness 3 mm / 0,12 in.) on collar of primary
gear.
Fit disk spring (pos. 19) with convex side upwards on collar of primary gear
Place tab washer (pos. 20) onto disk spring.
Apply LOCTITE 221 violet on the thread of hex. nut (pos. 21).
Fix primary gear with hex. nut at clutch drum.
Tightening torque 10 Nm / 88 lb ft and additional one turn (360°)
The hex. nut (pos. 21) has to be fitted so that the machined face of the hex. nut
shows towards clutch drum.
Remove excessive LOCTITE.
Bend the tab washer (pos. 20) with pliers over the hex. nut and tap it with a plastic
hammer to the hex. nut side.
To allow fast exchange of gear ratios we recommend you to carry in stock various
pre-assembled clutch drums with the respective primary drive gears.
ROTAX KART RM1
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Operator`s Manual RM1
Ausgabe/Edition 01/2006