Adjusting The Wheelbase Length - Invacare Action 4 NG Heavy Duty Service Manual

6. Reinstall the rear wheel to the wheelchair. Refer to Removing/Installing Rear Wheels
paragraph.
7. Repeat STEPS 1

Adjusting the Wheelbase Length

NOTE: For this procedure, refer to FIGURES 5.5 and 5.6
1. Remove the wheel. Refer to Removing/Installing Rear Wheels paragraph.
2. Remove the two mounting screws that secure the wheel plate to the wheelchair
frame.
The top of the axle plate must remain on the plastic seat bracket.
Otherwise, scratching, and slight frame damage may occur.
3. Align the wheel plate with one of two adjustment holes. There are 2 positions
possible: Factory setting for Fixed backrest is Standard position "A", for Recliner backrest
is Passive position "B". Refer to detail "A" of FIGURE 5.6, next page.
The two mounting screws need to be two adjustment holes apart to maintain frame
integrity. Respect factory settings related to backrest type ("A" for Fixed, "B" for
Recliner), refer to detail "A" of FIGURE 5.6.and to seat depths (400 mm or 450 mm).
Any change to one or any combination of the 2 positions may cause the
wheelchair to increase/decrease in stability.
Anti-tippers can be fitted to secure the stability if required. Refer to SECTION 9.
NOTE: When using the last adjustment position, the existing mounting screw needs to be
switched to the front of the back-cane bracket.
4. Repeat STEPS 1 to 3 for the other axle plate.
NOTE: Both axle plates should be set at the same position. Head of bottom mounting
screws needs to be on the outside position.
Wheel Plate
"B"
Position
Mounting
Screws
6 for opposite wheel, if necessary.
~
Rearward
FIGURE 5.5 Adjusting the Wheelbase Length
SECTION 5—REAR WHEELS/FRONT CASTORS
C A U T I O N
W A R N I N G
Wheelchair
Locknuts
3 1
Frame