Streifeneder ortho.production 3A20 Instrucciones De Uso página 11

Set the joint mobility by adjusting the axle friction
„
The axis pins are bedded in maintenance-free axis bushings and fastened by a cap screw each
to washer and lock nut. The bearing allows adjustment of the axis friction (resistance to motion)
and readjustment of tolerance variation.
Please fix the lock nut by using the attached wrench. Turning the cap screw with a 5 mm allen
key counter clockwise decreases friction, whereas turning clockwise increases friction. Even
slight adjustments of 5° to 10° provide a perceptible change (fig. 5).
Adjusting the extension assist spring
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By turning the adjustment screw the tension of the extension spring can be adjusted with a
5 mm allen key (fig. 6). Turning the screw counterclockwise decreases the tension of the
spring, turning it clockwise increases the tension of the spring. The maximum penetration
depth of the adjustment screw in the spring housing should not exceed 8 mm (maximum
preload) (fig. 6).
Replacing the extension stop
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Flex the knee and remove the plastic knee cap by loosening the cap screw using a 3 mm allen
key (fig. 7).
Turn the adjustment screw using a 4 mm allen key until the extension stop drops out.
To assemble the extension stop first turn the adjustment screw two to three threads into the
threaded hole, simultaneously position the guide groove in the extension stop facing the guide
wedge (fig. 8).
Hold the extension stop in place with your hand. Turn the adjustment screw using a 4 mm
allen key until the guide groove engages the guide wedge (fig. 9).
Replacing the bumper
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As described under „Adjusting the extension assist spring", first remove the extension
assist spring. Loosen the set screw which holds the upper axis pin of the linkage bar using a
2.5 mm allen key (fig. 10). Push out the axis pin using a drift punch (size 4) (fig. 11).
Rotate the posterior linkage bar distally and replace the stop bumper (fig. 12).
Assemble in reverse order and lubricate the metal surfaces with Joint grease Lubricant.
While mounting the axis pin it is important to look out for the correct position of the locking
groove.
The set screw must be secured with Loctite 241.
The tightening torque for the set screw is 7 Nm with the 173P10 or 173P11 Torque
Wrench, calibrated.
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