Otto Bock 490E75 Series, Service Manual

Page: 82 / 164

Service work
490E75=0_C 82 | Ottobock
170 171
4.13.8 Adjusting the centre of gravity (VAS seat without module for combination of seat height ad-
justment and seat tilt)
WARNING
Shifting the centre of gravity
Severe injuries due to the power wheelchair tipping over and falling
f
Only choose positions that are permissible for the new configuration. Contact Ottobock Customer Service for
more information. Have the serial number of the power wheelchair ready. It is used to determine the permissi-
ble positions.
f
Prior to initial use, test how changes in the centre of gravity affect the behaviour of the power wheelchair on
inclines, slopes, side hills or when crossing obstacles with the secure support of an attendant.
CAUTION
Failure to observe installation instructions
Pinching, crushing due to falling parts
f
The seat and its individual parts have a substantial weight. Secure the parts against falling before loosening
them.
f
Prerequisites:
Switch off the control device and deactivate the main fuse (see Page 15).
If necessary: remove the leg supports.
f
Tools: Allen wrench size 6; open-ended wrench size 13; torque wrench with Allen insert size 6
Dependencies
The seat‘s centre of gravity can be adjusted by sliding the seat frame relative to the mobility base. Among other
things, the permissible centre of gravity depends on:
• Type and size of the mobility base (front-wheel drive FWD see Fig. 173, mid-wheel drive MWD see Fig. 174,
rear-wheel drive RWD see Fig. 175)
• Seat depth
• User weight
Adjusting the centre of gravity
1) Check the frame measurement of the VAS seat.
INFORMATION: The distance from the front seat bracket to the front edge of the seat must be 110 mm
’N@@DB{¾Ä¿xDO@H¾“{AI@>@NN<MTx>JMM@>OOC@AM<H@H@<NPM@H@IOOJ¾¾½HH=TNGD?DIBOC@N@<O=<MN
JIOC@N@<O=M<>F@ON<I?uMHGTM@}ODBCO@IDIBOC@N>M@RN{
2) Loosen and remove the 4 screws between the seat frame and mobility base on both sides (see item 2).
3) GD?@OC@N@<OAM<H@OJ<KJNDODJIOC<ODNK@MHDNND=G@AJMOC@I@R>JIuBPM<ODJI{
4) IN@MOOC@ÁN>M@RN=@OR@@IOC@N@<OAM<H@<I?HJ=DGDOT=<N@JI=JOCND?@Nx<I?uMHGTODBCO@IOC@HOJ25 Nm
(see item 2).
5) Check the control measurement of the seat.
INFORMATION: The control measurement is measured from the front edge of the front seat height ad-
apter to the front edge of the seat, and varies depending on the configuration.