Adjusting Wheelbase Length (Adjusting Center Of Gravity) - Invacare A4 Owner's Manual

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Make sure the detent pin and locking pins of the quick/quad-release axle are fully released before

operating the wheelchair.

The locking pins MUST be protruding past the inside of the rear wheel axle bushing for a positive lock.

Keep locking pins clean.

11. If the locking pins of the quick/quad‐release axles are not protruding past the inside of the axle bushing or there is too

much movement of the rear wheel assembly in a back and forth position, Refer to Adjusting The Quad‐release Handle

on page 38 or Removing The Play From The Rear Wheels on page 39.

12. Ensure the wheelchair is parallel to the floor. Refer to Adjusting Caster Height on page 42.

13. Ensure anti‐tippers are adjusted properly. Refer to Anti‐tipper Adjustment/Replacement on page 50.

Indexing Marks

FIGURE 5.9 Repositioning Camber Inserts (Adjusting Rear Wheel Camber)

Adjusting Wheelbase Length (Adjusting Center Of Gravity)

NOTE: For this procedure, refer to FIGURE 5.10 on page 34.

The position of the footrest, seat angle, back angle, seating system/upholstery, caster size and posi-

tion, rear wheel size and position, use of anti-tippers, as well as the user condition directly relate to

the stability of the wheelchair. Any change to one or any combination of the ten may cause the

wheelchair to decrease in stability. EXTREME care MUST be taken when changing the stability of the

wheelchair. Refer to Stability on page 9.

NOTE: The camber bar is always mounted to the bottom of the wheelchair frame.

Perform one of the following:

A. Non‐suspension ‐ Loosen, but do not remove the hex screw that secures each of the top clamps to the wheelchair frame.

Suspension ‐ Loosen, but do not remove the two hex screws that secure each of the top clamps to the wheelchair frame.

Position the camber clamps on the wheelchair frame at the desired position.

A. Lengthening The Wheelbase ‐ will increase the stability and maintain standard maneuverability of the wheelchair.

Shortening The Wheelbase ‐ will increase the maneuverability, distribute additional weight onto the rear wheels, and make the

wheelchair less stable.

NOTE: The performance of the wheelchair will be affected if the camber clamps do not sit flush on the wheelchair frame.

Part No 1110545

WARNING

Camber Insert - Rotate 180°

Indexing Ring

WARNING

SECTION 5—FRAME

Axle Tube

Camber Clamp

A4 Owner's Manual

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