9. Knee Maintenance
9.1 Changing Various bumpers:
For the knee head leveling bumper,
use 2mm wrench driver to loosen the
bumper set screw by turning anti-
clockwise.
Note: Indicate position of the screw prior
to removal of the bumper. Push out the
bumper by turning the 5mm hex screw
clockwise.
NOTE: Be sure that the screw is back to
the original position prior to insertion of
the new bumper! If the screw is
protruding out, the bumper may fall off,
and will also prematurely wear out the
bumper!
Place new bumper back into the slot
same as previous one.
For the round shape bumper, use a
small standard screwdriver to pry out
the old bumper.
Insert with a new one.