Procedure 7 - Stability Adjustments; Seat-To-Floor Height Determination; Changing Seat-To-Floor Height - Invacare spyder Service Manual

STABILITY ADJUSTMENTS
This Procedure includes the following:

Seat-to-Floor Height Determination

Changing Seat-to-Floor Height

Installing/Adjusting Anti-tipper Mounting Brackets
Installing/Adjusting the Anti-tippers
WARNING
After ANY adjustments, repair or service
and BEFORE use, make sure all attachment
hardware is tightened securely - other-
wise, injury or damage may result.
SEAT-TO-FLOOR HEIGHT
DETERMINATION (FIGURE 1)
NOTE: All measurements are in inches. The seat-to-floor
heights are approximate to +1/2-inch.
NOTE: The seat-to-floor heights are based on pneumatic
tires and pneumatic tires with flat free inserts. If wheelchair
is equipped with urethane tires, subtract 1/4-inch from the
measurements listed below. All heights are approximate
to +1/4-inch due to tire wear and air pressure.
Seat-to-floor height is determined by measuring the dis-
tance between the front of the seat upholstery at the seat
rail and the ground/floor.
The different seat-to-floor heights are possible by using
different combinations of REAR WHEELS, REAR
WHEEL HEIGHT, FRONT CASTER POSITION,
CASTER SIZE and FORK STEM SIZE.
FIGURE 1 - SEAT TO FLOOR HEIGHT
DETERMINATION
CHANGING SEAT-TO-FLOOR
HEIGHT
BEFORE performing this procedure, refer
to STABILITY in PROCEDURE 1 of this manual
for additional requirements.
The lower tubing of the wheelchair frame
MUST be parallel to the ground at all times.
The chart in this procedure shows the
combinations for ALL possible seat-to-floor
heights and MUST be followed, otherwise
- injury or damage may occur.
Wheel locks MUST be adjusted BEFORE us-
ing the wheelchair.
Anti-tippers, if equipped, MUST be adjusted
BEFORE using the wheelchair.
1. Refer to the charts on the following pages to deter-
mine the size and proper adjustment for the rear
wheels, casters, forks, and anti-tippers for the desired
seat to floor height.
2. Adjust the rear wheel to the appropriate axle lug posi-
tion. Refer to ADJUSTING REAR WHEEL HEIGHT
in this PROCEDURE 6 of the manual.
3. Perform one (1) of the following:
A. CHANGING TO OR FROM 8-INCH CASTERS -
B. CHANGING/ADJUSTING 3, 5, OR 6-INCH
4. Replace and/or reposition the front casters. Refer to
REPLACING/REPOSITIONING/INSTALLING CAST-
ERS in PROCEDURE 5 of this manual.
5. Adjust the front caster headtubes. Refer to ADJUST-
ING CASTER HEADTUBES in PROCEDURE 5 of
this manual.
6. Adjust the seat dump if desired. Refer to ADJUSTING
THE REAR SEAT DUMP in PROCEDURE 3 of this
Seat-to-Floor
manual.
7. Adjust the wheel locks. Refer to USING/ADJUSTING
THE WHEEL LOCK in PROCEDURE 7 of the Spyder
owner's manual, part number 1093830.
8. Adjust or replace the anti-tippers. Refer to INSTALL-
ING/ADJUSTING ANTI-TIPPER MOUNTING BRACK-
ETS and/or INSTALLING/ADJUSTING THE ANTI-TIP-
PERS in this procedure of the manual.
23
WARNING
Replace the front forks. Refer to INSTALLING/RE-
PLACING FORKS in PROCEDURE 5 of the manual.
CASTERS - Proceed to STEP 4.
PROCEDURE 7
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