43
11. Maintenance
Check the system joint for wear and functionality every
6 months
. Also check the functionality after every
maintenance carried out.
Joint Component
Problem
Measure
spring unit
breakage of disc springs (fig. 27)
replacing spring unit
radial move of disc springs (fig. 28)
realigning disc springs with pliers
breakage of pressure spring
replacing spring unit
squeaking of pressure spring
greasing pressure spring with orthosis
joint grease
pressure spring/
pressure spring in
adjusting screw unit
breakage of pressure spring
replacing pressure spring
stop damper/
stop damper in
adjusting screw unit
material fatigue or breakage
replacing stop damper
O-ring
wear
replacing O-ring
bore for bearing nut of
system stirrup
oversize
inserting repair bushing, see
paragraph 11.2
sliding washer
wear
replacing sliding washer, see
paragraph 11.3
bearing nut
wear
replacing bearing nut
Secure the screws for the cover plate with the torque corresponding to the system width and LOCTITE® 243
medium strength during every maintenance (see paragraph 8.7). Remove all adhesive residues first.
11.1 Maintenance of the Disc Springs
Check the disc springs particularly carefully during
maintenance. If necessary, realign the disc springs
to increase the useful life of the spring unit. If
necessary, replace the spring unit to maintain the
functionality of the system joint.
11.2 Repairing the Bearing Nut Bore
Insert a repair bushing if the bore for the bearing nut at the system stirrup is worn out.
1
Clamp the system stirrup firmly into a vice.
2
Bore and ream the hole until it has reached the desired dimen-
sion (fig. 29 and 30).
3
Insert the repair bushing made of bronze completely into the
bore.
fig. 27
fig. 28
fig. 29
fig. 30
