Adjusting Lower Leg Length; Adjusting The Backrest - Invacare Storm4 Service Manual

Adjusting seat height manually with an adapter
1. Remove seat. See "Replacing seat support with manual
tilt module (till Dec. 2010)" or "Replacing seat support
with electric tilt module".
CAUTION!
Risk of damage to lifter column
Using incorrect screws or inserting and
tightening screws incorrectly will damage
lifter column. The lifter column is supplied
with self-tapping screws. The screws are used
on underside as well as on upper side.
– Use only screws provided.
– If screws were already screwed in: When
reinstalling screws, make sure that they are
screwed carefully into existing thread.
– Tighten screws to a torque of 15-17 Nm.
2. Position adapter (4) on top of lifter column (5).
3. Secure adapter with self-tapping screws and washers (3).
4. Position seat frame (2) on lifter column and adapter.
5. Apply medium strength thread locking adhesive to four
screws (1).
6. Insert four screws and tighten them to torque of 25 Nm.
7. Install parts in reverse order.
8. Install cables. See "Installing on lifter column type B".
9. Check all mobility device functions.

4.1.2 Adjusting lower leg length

Invacare offers a range of legrests which can be adjusted
individually. See user manual.

4.1.3 Adjusting the backrest

CAUTION!
Adjusting the seat tilt or the backrest angle
changes the geometry of the mobility device and
directly influences its dynamic stability!
– For details regarding dynamic stability,
negotiating gradients and obstacles and the
correct adjustment of seat tilt or backrest
angle, refer to Taking Obstacles and Driving up
and down gradients.
Adjusting backrest width
Backrest width is adjusted by performing the following tasks:
1533060-M
1. Adjusting back posts.
2. Adjusting backrest:
• Tension adjustable backrest, as described in
Adjusting tension adjustable backrest, page 10.
• Flex3 backrest, as described in Adjusting Flex3
backrest, page 10.
3. Replacing backrest cushion (these are available in various
widths). When modifying backrest width, seat width
must also be correspondingly adapted. See Adjusting
seat width , page 10.
• 3 mm Allen key
• 5 mm Allen key
• 13 mm wrench
For screw position per backrest width, refer to table below.
Screw position
A
B
C
D
* Back posts for Flex3 seat only adjust up to a seat width
setting of 480 mm. The remaining 5 cm are adjusted via
the backrest plates.
1. Remove backrest cushion.
2. Loosen straps of sling backrest or remove Flex3 backrest.
3. Loosen and remove both screws (5) of actuator fixation
bracket.
4. Remove shroud of actuator fixation bracket.
5. Loosen and remove screws and nuts (2, 4) on upper and
lower actuator fixation bracket on both sides.
6. Adjust backrest fixation (6) for new backrest width
according to the table above.
7. Insert screws (2) through shroud of actuator fixation
bracket and corresponding holes of backrest fixation to
actuator fixation.
8. Tighten these with nuts (4).
9. Reposition cover of actuator fixation bracket.
10. Insert and tighten screws (5) again.
Setup
Seat width
530 mm*
480 mm
430 mm
380 mm
9