Adjusting The Axle Tube - Invacare A4 Owner's Manual

Adjusting The Axle Tube

NOTE: For this procedure, refer to FIGURE 5.8.
Quick-Release Levers - Make sure the quick-release levers are in the closed position before using
the wheelchair, otherwise personal injury or damage to the wheelchair may occur.
Standard and Suspension Camber Clamps - Make sure the hex screws are securely tightened
BEFORE using the wheelchair, otherwise personal injury or damage to the wheelchair may
occur.
DO NOT close the quick-release levers or tighten the socket screws or hex screws without camber
inserts in the axle tube. Damage to the axle tube will occur.
NOTE: Before performing this procedure, make sure the camber
inserts are positioned to the lowest degree of camber. Refer to
Repositioning Camber Inserts (Adjusting Rear Wheel Camber).
NOTE: Stand behind the wheelchair to determine LEFT or RIGHT.
1. If necessary, open both camber clamps. Refer to
Opening/Closing Camber Clamps on page 27.
2. Loosen the set screw that secures each toe adjustment ring
to the axle tube.
3. Using an ʺLʺ square, rotate the axle tube until the flat edge
of the camber insert is at a 90° angle with the ground/floor.
4. Close the right camber clamp. Refer to Opening/Closing
Camber Clamps on page 27.
5. Rotate the left toe adjustment ring until the tab stops
against the lower edge of the camber clamp.
6. Securely tighten set screw on left toe adjustment ring.
7. Measure the distance between the rear of the rear wheels
and front of the rear wheels at the centerline of the rear
wheels. Refer to Determining Toe In/Toe Out on page 28.
8. Perform one of the following:
• Toe In/Toe Out measurement is within
1
± / ‐inch ‐ Proceed to STEP 9.
8
• Toe In/Toe Out measurement is not within ±
‐ Repeat STEPS 1‐7 until measurement is within
1
± / ‐inch.
8
9. Open the right camber clamp. Refer to Opening/Closing
Camber Clamps on page 27.
10. Reposition the camber inserts to the highest degree of
camber. Refer to Repositioning Camber Inserts (Adjusting
Rear Wheel Camber) on page 32.
11. Repeat STEP 3.
12. Close the left camber clamp. Refer to Opening/Closing
Camber Clamps on page 27.
13. Rotate the right toe adjustment ring until the tab stops
against the upper edge of the camber clamp.
14. Securely tighten set screw on right toe adjustment ring.
15. Repeat STEP 7.
Part No 1110545
WARNING
CAUTION
90° Angle
Left Tab Stopped
against lower edge
of camber clamp
HIGHER DEGREE OF CAMBER
1
/ ‐inch
8
Right Toe
Adjustment Ring
Right Tab Stopped
against upper edge
of camber clamp
FIGURE 5.8 Adjusting The Axle Tube
31
SECTION 5—FRAME
Ground/Floor
LOWER DEGREE OF CAMBER
Axle Tube will rotate up only
Axle Tube will rotate down only
Flat Edge of
Camber Insert
"L" Square
Left Toe
Adjustment Ring
A4 Owner's Manual