Gear Housing - Slip Clutch - Husqvarna DMS 240 Workshop Manual

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Torque: 85 Nm
Aluminium
GEAR HOUSING – SLIP CLUTCH
523 05 77-02
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Secondary shaft – slip clutch
Components
The components in the secondary shaft are shown in
the adjacent illustration. The top gear wheel has a slip
function. The torque is given by the spring washers
being compressed by the hook nut at the top. On both
sides of the gear wheel there are friction washers made
of specific material.
For removal and adjustment, a special socket is used
together with a torque wrench. This can be ordered
from Husqvarna, art.no: 523 05 77-02.
The secondary shaft with its components are only
supplied as a complete spare part, and therefore there is
usually no need to dismantle it into its component
parts. If you suspect damage, it needs to be disassembled
for visual inspection.
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Note the following
Item 1: The hook nut has a lock spring on the upper
side. The nut is fitted with this side facing up.
Item 2: Press ring for spring washers.
Item 3: This machine has the three spring washers tur-
ned in the same direction. See separate illustration.
Item 4 and 8: Support washers.
Item 5 and 7: Friction washers.
Item 6: This gear wheel is driven by the primary shaft's
straight-cut lower gears. Note the inner bushing which
allows slip between the shaft and the gear.
Item 9: The gear wheel drives the spindle shaft.
Item 10: The secondary shaft with rigidly mounted
support ring.
Adjustment
The actual slip torque is not measured for this slip
clutch. Tightening the hook nut to a specified torque,
85 Nm, gives sufficient accuracy for the slip torque
which is proportional to the tightening force. Hook nut
(1) and compression ring (2) must be greased.
The adjustment is made as follows: Fasten the
secondary shaft's helical drives in a vice. Use protective
jaws of aluminium to avoid damaging the shaft.
Place the socket on the torque wrench and tighten
the hook nut a half turn counter-clockwise to slightly
loosen the nut. Set the torque wrench torque and tighten
in an even, slow and continuous motion clockwise until
the torque wrench trips.
Tightening torque: 85 Nm.
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