Invacare CRFAT Owners Manual - Page 44

SECTION 8-WHEELS Repairing/Replacing Rear Wheel, Tire/Tube ƽ 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 procedure. 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) ƽ 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-tippers 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. Crossfire™Series Wheelchairs 44 Part No 1134872