4.13.13 Replacing The Seat Tilt Actuator - Otto Bock 490E75 Series Service Manual

4.13.13 Replacing the seat tilt actuator

Prerequisites:
Activate (lock) the brakes on both drive motors.
Optional: Move the seat to the highest seat height (see Page 15). If seat height adjustment is not installed, fold
up the seat and secure it against falling down and tipping over with the active support of a helper (see Page 16)
Move the seat tilt to the lower end position. If you are unable to adjust the seat tilt, the seat should also be secured
against falling down with the active support of a helper.
Switch off the control unit and deactivate the main fuse (see Page 15).
If necessary: Remove the legrests.
Tools: Small slotted screwdriver; Allen wrench size 5; torque wrench with Allen insert size 5; pin punch Ø 8 mm;
hammer/soft-faced hammer
Removing the seat tilt actuator
1) Remove the seat plate (see Page 74 ff.).
2) INFORMATION: Note the installed position of the cable connections being loosened. The actuator cable
Follow the actuator cable and disconnect it from the seat module/controller. To do so, remove the cover from the
seat module / controller (see Page 25/Page 19).
3) Remove the retaining ring on the bolt of the seat tilt (see Fig. 189, item 1).
4) CAUTION! Injuries due to pinching, crushing if the seat falls down. Secure the seat against falling down
with the active support of a helper.
Use a pin punch to knock the bolt out of the seat frame and bearing eye of the seat tilt actuator (see Fig. 189,
item 2).
5)
(see Fig. 190, item 1).
6) INFORMATION: Take note of the installed position of the actuator cable.
Remove the seat tilt actuator with the actuator cable. Remove additional cable attachments if necessary.
7) Lower the seat carefully and securely onto the seat frame.
Installing the seat tilt actuator
1)
2)
3) Press the bolt into the seat frame and the bearing eye of the seat tilt actuator (see Fig. 189, item 2).
4) Secure the bolt with the retaining ring (see Fig. 189, item 1).
5) Position and connect the actuator cable according to its original installed position.
INFORMATION: The actuator cable is connected to the seat module or the controller depending on the
6) Reattach the loosened cable attachments and covers.
7) Attach the seat plate (see Page 74 ff.).
189
490E75=0_C
190
Service work
Ottobock | 89