Folding The Seat Up/Down - Otto Bock 490E75 Series Service Manual

Service work
4.5.4

Folding the seat up/down

WARNING
Exposed pinch points when seat is folded up
Pinching, crushing of limbs (e.g. fingers), tipping over due to lack of caution when folding the seat up and down
To safely fold the seat up or down, grasp the seat by the seat frame, by the backrest or by the legrest adapter.
Never use the legrests themselves to fold the seat up or down as these do not provide a firm handhold.
After folding up the seat, shake it to verify that it is firmly locked. A seat which is not firmly locked could fall back
to its starting position and result in severe crushing injuries.
Always secure the wheelchair against tipping over with the active support of a helper when the seat is folded
up. Always fold down the seat before jacking the wheelchair up or down.
Move the seat to the lowest seat height before folding it up. If this is not possible (e.g. due to a defect in the
seat height adjustment actuator), then secure the seat during all work with the active support of a helper.
Prerequisites:
Optional: Move the seat to the lowest seat height (see Page 15).
Switch off the control unit and deactivate the main fuse (see Page 15).
If necessary: Remove the legrests.
Tools: Allen wrench size 6; open-ended wrench size 17; torque wrench with socket insert size 17
Folding up the seat
1) Loosen the support bolts on both sides of the front frame on the mobility base and unscrew them about 5 mm
(see Fig. 7, item 1).
INFORMATION: Use the Allen head for loosening and the Allen wrench to further unscrew the support
bolts.
2) Pull out the locking bolt on the left side of the rear frame of the mobility base (see Fig. 8, item 2) and fold the seat
back.
NOTICE! Risk of material damage due to collision of the seat with other components of the wheelchair.
Make sure that no parts of the seat collide with other components. Use special caution with the rear-
most ratchet position.
3) Release the locking bolt and securely engage it in the front locking position. The locking bolt engages audibly
when positioned correctly.
INFORMATION: The seat can be folded up in 2 locking positions. When carrying out service work with
secure the wheelchair against tipping and falling with the active support of a helper.
4)
Folding down the seat
1) WARNING! Risk of pinching and crushing due to sudden lowering of the seat. Actively secure the seat
against falling before pulling out the locking bolt. Take note of and correct the cable routes in the frame
area when folding down the seat to prevent damage.
Pull out the locking bolt on the left side of the rear frame of the mobility base (see Fig. 8, item 2) and slowly and
carefully fold the seat forward and down.
2) Release the locking bolt and carefully lower the seat onto the support bolts on the front frame of the mobility base.
3)
INFORMATION: Use the Allen wrench for screwing in and the Allen head of the support bolts for tigh-
tening.
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