SECTION 8—WHEELS
Crossfire™Series Wheelchairs 42 Part No 1148078
Repairing/Replacing Rear Wheel, Tyre/Tube WARNING
Replacement of the tyre 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 page54 ONLY after
contacting Invacare. Anti-tipper height (if applicable) must also be adjusted to maintain 1-1/2 to
2-inch (3.81 to 5.08 cm) clearance between bottom of the anti-tipper wheels and the floor. Refer to
Adjusting/Replacing Anti-tipper on page 58.
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 FIGURE8.6 on page 43.
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 socke t 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.