Adjusting Weight Distribution - Invacare Arrow RWD Service Manual

PROCEDURE 16

ADJUSTING WEIGHT DISTRIBUTION

(FIGURE 9)
R NOTE: Seat mount plates and seat support brackets al-
W
low the seat frame to be repositioned along the base frame.
D
The range is determined by position of the seat stop
screws. The front seat stop screw is positioned at 4-inches
W and the rear seat stop screw is positioned at 10-inches.
H Both seat stop screw positions are measured from the
E
front of the base frame.
E
NOTE: The position of the seat support brackets is factory
L
set at 7-inches, this measured from the front of the base
C
frame to the front of the seat support bracket. This will put
H
about 70% of the total weight of the chair and user over the
A
large wheels. However, this setting may not be the most
I
desirable in terms of maneuverability, front rigging clearance
R
and comfort for the user.
S
Adjustment Options
NOTE: This section will provide the user with some knowl-
edge of what to expect if the following adjustments are made.
1. Moving the seat forward.
Advantage:
Disadvantage: More weight is put on front casters and
NOTE: This option can also be accomplished by moving
the motor backward on the suspension arm. Refer to RE-
POSITIONING GEARBOX in this procedure of the manual.
This adjustment allows more clear-
ance for front riggings and a more
stable "feel" for the user.
makes turning more difficult.
2. Moving the seat rearward.
Advantage: Makes turning easier and provide bet-
ter traction for the large wheels.
Disadvantage: This adjustment, however, allows less
clearance for front riggings and the
user will experience more engagement
of the anti-tippers.
NOTE: This option can also be accomplished by moving
the motor forward on the suspension arm. Refer to REPO-
SITIONING GEARBOX in this procedure of the manual.
Adjusting Weight Distribution Procedure
1. Loosen the four (4) mounting screws that secure the
seat support brackets to the base frame.
W W W W W ARNING
DO NOT adjust seat beyond limit stops.
2. Adjust seat forward or back to the position determined
from the previous section ADJUSTMENT OPTIONS.
3. Retighten the four (4) mounting screws securing the
seat support brackets to the base frame.
4. Test wheelchair maneuverability, comfort, and handling.
5. Repeat STEPS 1-4 for further adjustment, if necessary.
Mounting Screw
Washer
Base
Frame
FIGURE 9 - ADJUSTING WEIGHT DISTRIBUTION
84
RWD WHEELCHAIRS
ARNING ARNING ARNING ARNING
Seat Support
Bracket