Invacare Electric wheelchair - Manual (Page 57)

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8.4.1.1 Adjust the backrest using the perforated plate
The angle of the backrest has six positions, from -10° to +30°.
•
Unscrew the hand screws (1) on both sides.
•
The backrest is adjusted by choosing a
combination of one of the two bore holes in
the backrest frame and one of the six bore
holes in the fixing plate.
•
Re-position the screws and tighten.