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4.13.11 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
Activate (lock) the brakes on both drive motors before carrying out any work.
Secure the seat and the wheelchair against tipping and falling during all work with the active support of a hel-
per.
Only fold up the raised seat for the work described below and only with the active support of a helper.
Immediately fold the raised seat back down after completing the work.
Prerequisites:
Activate (lock) the brakes on both drive motors.
Move the seat to the highest seat height (see Page 15). 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 Page 15).
If necessary: Remove the legrests.
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 Page 16).
2) Remove the rear cover (see Page 19).
3) Loosen and remove the 2 screws between the bottom of the frame and the seat height adjustment actuator (see
Fig. 180, item 1).
4) Fold down the seat (see Page 16).
5) Loosen and remove the 4 screws on the module carrier (see Fig. 181, item 1).
6) Carefully lift the module carrier and controller off the frame (see Fig. 181, 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. 182, item 1).
8) Loosen and remove the set screw on the eccentric of the seat height adjustment (see Fig. 183, 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. 184).
10) Loosen and remove the 2 screws between the top of the frame and the seat height adjustment actuator (see
Fig. 185, 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.
12) Carefully lower the seat with the active support of a helper and rest it securely on the frame.
Installing the seat height adjustment actuator
1) 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.
Carefully pull the seat upwards with the active support of a helper.
2) Insert the seat height adjustment actuator and position the actuator cable according to the original installed po-
sition. Reattach or close the loosened cable attachments.
3)
(see Fig. 185, item 1).
4) Carefully insert the bearing eye of the seat height adjustment actuator into the eccentric (see Fig. 183, item 2).
5) Press the bolt into the eccentric and the bearing eye of the seat height adjustment actuator.
6)
7) Connect the actuator cable of the seat height adjustment according to the original installed position (see Fig. 182,
item 1).
8) Carefully position the module carrier and controller on the frame (see Fig. 181, item 2).
9)
10) Attach the rear cover (see Page 19).
490E75=0_C
Service work
Ottobock | 85
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