SECTION 8—WHEELS
Crossfire
™
Series Wheelchairs
44
Part No 1134872
Repairing/Replacing Rear Wheel, Tire/Tube
WARNING
Replacement of the tire or tube MUST be performed by a qualified technician.
CAUTION
Changing the size of the rear wheels can affect the performance of the wheelchair.
Contact Invacare at the numbers on the back cover BEFORE performing this proce-
dure.
NOTE:
If
replacing
rear
wheels
with
a
different
size
than
what
was
originally
on
the
wheelchair,
the
front
caster
height
must
also
be
changed
to
keep
the
wheelchair
frame
parallel
to
the
floor.
Refer
to
Removing/Installing
the
Elastomers
(Suspension
Forks
Only)
on
page 56
ONLY
after
contacting
Invacare.
Anti
‐
tipper
height
(if
applicable)
must
also
be
adjusted
to
maintain
1
‐
1/2
to
2
‐
inch
clearance
between
bottom
of
the
anti
‐
tipper
wheels
and
the
floor.
Refer
to
Adjusting/Replacing
Anti
‐
tipper
on
page 60.
Adjusting Wheelbase Length (Adjusting Center of
Gravity)
WARNING
ALWAYS perform this procedure in the presence of an assistant. The position of
the footrest, camber tube, back angle, the tautness of the back upholstery as well as
the user's condition are directly related to the wheelchairs stability. Any change to
one or any combination of the five may cause the wheelchair to decrease in stability.
Use EXTREME caution when using a new seating position. The addition of anti-tip-
pers may be required.
NOTE:
For
this
procedure,
refer
to
FIGURE 8.6
on
page 45.
NOTE:
Measure
the
distance
between
the
center
of
the
front
caster
and
the
center
of
the
rear
wheel
to
determine
the
new
wheelbase
length.
NOTE:
The
wheelbase
length
can
be
adjusted
in
one
or
more
of
the
following
combinations:
• Repositioning
the
camber
tube
mounting
brackets.
• Repositioning
the
camber
tube
mounting
bracket
socket
screws.
• Reversing
the
camber
tube
mounting
bracket
direction
1. Refer
to
the
chart
below
to
determine
the
adjustments
necessary
to
achieve
the
desired
wheelbase
length.
