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NOTE: Rear Seat-to-Floor height is two (2) inches shorter than Front Seat-to-Floor height.
NOTE: The Front Seat-to-Floor heights in the chart are determined using a 5-inch front caster.
NOTE: Refer to
REPOSITIONING THE AXLE TUBE in PROCEDURE 7 for an explanation of the Upper,
Center and Lower axle tube positions.
Front Seat-to-floor Height Adjustment
NOTE: Refer to STABILITY in PROCEDURE 1 for
warnings concerning wheelchair stability.
Seat-to-floor height is determined by measuring from
the top of the seat rail to the ground/floor.
The different seat-to-floor heights are possible by us-
ing different combinations of rear wheel size and axle
tube position.
1. Refer to the chart below to determine available
front seat-to-floor heights for each wheelchair
frame height.
2. Determine the changes needed to the rear wheels
and axle tube by reading across the chart for the
seat-to-floor height determined in STEP 1.
3. Refer to REPOSITIONING THE AXLE TUBE in
PROCEDURE 7 of the manual to adjust the axle
tube position.
4. After adjusting the axle tube, the front casters may
need to be repositioned to ensure the caster
headtubes are perpendicular to the ground. Refer
to
ADJUSTING FRONT CASTER HEIGHT in
PROCEDURE 7.
5. Anti-tipper height (if applicable) must be adjusted
to maintain 1-1/2 to 2-inch clearance between the
bottom of the anti-tipper wheels and the floor. Refer
to
ANTI-TIPPER REPLACEMENT/ADJUST-
MENT in PROCEDURE 8 of this manual.
6. Ensure wheel locks engage properly. Refer to
WHEEL LOCK ADJUSTMENT/REPLACEMENT
in this procedure of the manual.
SEAT PROCEDURE 6
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SHORT FRAME SEAT-TO-FLOOR HEIGHTS
FRONT SEAT-TO-FLOOR HEIGHT AXLE TUBE POSITION
REAR WHEEL SIZE (INCHES)
18 20 22 24
13-inch Upper N/A N/A N/A
14-inch Center Upper N/A N/A
15-inch Lower Center Upper N/A
16-inch N/A Lower Center Upper
17-inch N/A N/A Lower Center
18-inch N/A N/A N/A Lower
LONG FRAME SEAT-TO-FLOOR HEIGHTS
FRONT SEAT-TO-FLOOR HEIGHT REAR WHEEL SIZE (INCHES)
AXLE TUBE POSITION
20 22 24
16-inch Upper N/A N/A
17-inch Center Upper N/A
18-inch Lower Center Upper
19-inch N/A Lower Center
20-inch N/A N/A Lower