Otto Bock 490E75 Series, Service Manual

Page: 99 / 164

Service work
490E75=0_C Ottobock | 99
4.14.12 Replacing/adjusting the back upholstery (standard seat)
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Prerequisites:
Switch off the control unit and deactivate the main fuse (see Page 15).
Remove the seat cushion and back padding.
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Tools: Allen wrench size 4
1) Loosen and remove the 3 screws on the upper 3 hook and loop straps on both sides (see Fig. 207, item 1).
2) Open all the hook and loop straps on the back upholstery and replace if necessary (see Fig. 208).
3) From the bottom to the top, adjust the tension of the hook and loop straps to the weight and anatomical condition
of the user and fasten the straps one after the other.
INFORMATION: The two ends of the hook and loop strap have to overlap by at least 100 mm in each
case.
INFORMATION: Adjust the respective lower hook and loop straps somewhat tighter. Deviating adjust-
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207 208
4.14.13 Replacing/adjusting the back upholstery (VAS seat)
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Prerequisites:
Switch off the control unit and deactivate the main fuse (see Page 15).
Remove the seat cushion and back padding.
f
Tools: Allen wrench size 4
Removing the back straps
1) Open the hook-and-loop closures on both ends of the back straps (see Fig. 209/210, item 1).
2) Open and remove the Y hook-and-loop buckles on both ends of the back straps (see Fig. 211).
3) Pull the free ends of the back straps out of the plastic clamps (see Fig. 209/210, item 2).
4) If necessary: Remove upper eyelets (see Fig. 209, item 3). To do so, loosen and remove the 2 screws on the top
hook-and-loop strap on both sides (see Fig. 209, item 4).
5) CAUTION! Pinching, crushing due to falling frame components. Actively secure the back frame and
associated components against falling.
If necessary: Remove the lower eyelets (see Fig. 210, item 3). To do so, loosen and remove the 3 screws of the
grip bars on both sides (see Fig. 210, item 4).
Attaching and adjusting the back straps
1) If necessary: Attach the bottom eyelets (see Fig. 210xDO@HÀ“{C@IM@DIN@MO<I?uMHGTODBCO@IOC@ÀN>M@RNJA
the grip bars on both sides (see Fig. 210, item 4).
2) If necessary: Attach the top eyelets (see Fig. 209xDO@HÀ“{J?JNJxDIN@MO<I?uMHGTODBCO@IOC@¿N>M@RNJIOC@
top hook-and-loop strap on both sides (see Fig. 209, item 4).
3) Pull the free ends of the back straps through the eyelets and plastic clamps (see Fig. 209/210, item 2).
INFORMATION: In the area of the grip bars, the strap is passed directly around the back tube.
4) Place the Y hook-and-loop buckles around both ends of the back straps and fasten them (see Fig. 211).
5) Fasten one end of each of the back straps (see Fig. 212, item 1).
6) Pre-tension the back straps according to the needs of the user and fasten the loose end of the back straps (see
Fig. 212, item 2).