SECTION 7—REAR FRAME
53
Adjusting the Stability Lock Setting
NOTE: For this procedure, refer to FIGURE 7.6.
NOTE: Depending on the date of manufacture, the stability lock boot will be secured to the wheelchair frame by a tie-wrap or a 10-32
hex head screw.
1.
Ensure all six wheels of the wheelchair are in contact with the floor or work surface.
2.
If necessary, remove the two stability lock boots.
3.
If necessary, remove the two existing 1/4-20 keps nuts
that secure the two existing elevator bolts to the pivot
spring brackets.
NOTE: A United States penny may be used to gauge the distance
between the elevator bolt and the pivot ball.
4.
Thread the elevator bolts towards the base frame until
there is a 1/16-inch gap between the elevator bolts and
the pivot ball of the locking-gas cylinder.
5.
While maintaining the position of the elevator bolts, use
two new 1/4-20 keps nuts to secure the new elevator
bolts to the pivot spring brackets.
6.
Using a tie-wrap or mounting screw, install the stability
lock boot onto the base frame guide block.
FIGURE 7.6
Adjusting the Stability Lock Setting
Checking Stability Lock Function
NOTE: For this procedure, refer to FIGURE 7.7.
1.
Verify motor locks are engaged.
2.
Ensure all six wheels of the wheelchair are in contact
with the floor or work surface.
3.
Standing behind the wheelchair, lift the back canes up
and forward.
4.
If both of the following conditions occur, the stability
lock is functioning properly:
A. The wheelchair rocks forward slightly and then
locks.
B. The rear casters remain in contact with the floor or
rise less than 1/4-inch.
5.
If the stability lock does not function, contact Invacare
Technical Service at (800) 832-4707.
FIGURE 7.7
Checking Stability Lock Function
1/16-inch
Gap
1/4-20 Keps Nut
Elevator Bolt
Pivot Spring
Bracket
Pivot Ball
NOTE: A United States penny
may be used to gauge the
distance between the elevator
bolt and the pivot ball.
Rear Casters
Level Surface
Back Canes
Seat
Wheels
Springs
(Located Here)
