Replacing The Seat Height Adjustment Actuator - Otto Bock B-Series Service Manual

95
4.14.7

Replacing the seat height adjustment actuator

WARNING
Shifted centre of gravity, increased risk of wheelchair tipping over when seat is raised
Severe injuries due to pinching, crushing if the wheelchair tips over
f Activate (lock) the brakes on both drive motors before carrying out any work.
f Secure the seat and the wheelchair against tipping and falling during all work with the active support of a hel-
per.
f Only fold up the raised seat for the work described below and only with the active support of a helper.
f Immediately fold the raised seat back down after completing the work.
f Prerequisites:
Activate (lock) the brakes on both drive motors.
Move the seat to the highest seat height (see Seite 12). If it is not possible to move the seat height from the
lowest position, fold up the seat for the required work.
Switch off the control unit and deactivate the main fuse (see Seite 12).
If necessary: Remove the legrests.
f Tools: Allen wrench size 3, 4; torque wrench with Allen insert size 3, 4; pin punch Ø 8 mm; hammer/soft-faced
hammer
Removing the seat height adjustment actuator
1) Fold up the seat (see Seite 13).
2) Remove the rear cover (see Seite 15).
3) Loosen and remove the 2 screws between the bottom of the frame and the seat height adjustment actuator (see
Fig. 97, item 1).
4) Fold down the seat (see Seite 13).
5) Loosen and remove the 4 screws on the module carrier (see Fig. 98, item 1).
6) Carefully lift the module carrier and controller off the frame (see Fig. 98, item 2).
7) INFORMATION: Note the installed position of the cable connections being loosened.
Disconnect the actuator cable for the seat height adjustment (see Fig. 99, item 1).
8) Loosen and remove the set screw on the eccentric of the seat height adjustment (see Fig. 100, item 1).
9) WARNING! Severe injuries due to pinching, crushing if the seat falls down. Secure the seat against fal-
ling down with the active support of a helper.
Knock the bolt out of the eccentric of the seat height adjustment with a pin punch (see Fig. 101).
10) Loosen and remove the 2 screws between the top of the frame and the seat height adjustment actuator (see
Fig. 102, item 1).
11) INFORMATION: Take note of the installed position of the actuator cable.
Remove the seat height adjustment actuator with the actuator cable. Remove or open additional cable attach-
ments if necessary.
B-Series
96
Service work
Ottobock | 51