SECTION 7—REAR FRAME
51
Replacing the Elevator Bolt
NOTE: For this procedure, refer to FIGURE 7.3.
NOTE: It is recommended to replace and or adjust the setting of
both elevator bolts at the same time.
NOTE: Place two 5-inch blocks under the base frame to lift the
frame off the ground for ease in performing this procedure.
NOTE: Depending on the date of manufacture, the stability lock
boot will be secured to the wheelchair frame by a tie-wrap or a
mounting screw.
1.
Remove the two stability lock boots.
2.
With the base frame elevated on two 5-inch blocks,
allow the rear frame to swing down.
3.
Remove the two 1/4-20 X 5/8-inch mounting screws and
nylon spacer securing the rear frame assembly to the
wheelchair frame (Detail “A”).
4.
Remove the two existing 1/4-20 keps nuts securing the
two existing elevator bolts to the pivot spring brackets.
5.
Thread the two elevator bolts toward the base frame
until the elevator bolts can be removed from the pivot
spring brackets.
6.
Thread the new elevator bolt(s) into the pivot spring
bracket(s).
7.
Install the two 1/4-20 X 5/8-inch mounting screws and
nylon spacer securing the rear frame assembly to the
wheelchair frame (Detail “A”).
8.
Remove the blocks from under the base frame.
9.
Adjust the stability lock setting. Refer to Adjusting the
Stability Lock Setting on page 53.
FIGURE 7.3
Disassembling/Assembling the Rear Suspension Frame
NOTE: For this procedure, refer to FIGURE 7.4.
NOTE: Reverse this procedure to assemble the rear suspension
frame.
NOTE: If it is necessary to replace parts of the rear suspension
frame, use the new parts when assembling the rear frame.
1.
Remove the pivot springs from the rear suspension
frame. Refer to Removing/Installing the Rear Springs
on page 50.
2.
Remove the rear suspension frame from the base frame.
Refer to Removing/Installing the Rear Suspension
Assembly on page 48.
NOTE: When assembling the rear suspension frame, torque the
four 5/16-18 X 5/8 socket head cap screws to 13 ft-lbs ± 20%.
3.
Remove the four 5/16-18 X 5/8 socket head cap screws
and securing the pivot cross-member to the two rear
swingarms.
4.
Separate the two rear swingarms from the pivot bar.
5.
Remove the center bushing assembly from the pivot
bar.
FIGURE 7.4
Disassembling/Assembling the Rear
Rear Frame
Elevator
Bolt
Pivot Spring Bracket
Base
Frame
Rear Frame
Assembly
1/4-20 X 5/8-inch
Mounting Screws
Nylon Spacer
DETAIL “A”
1/4-20 Keps Nut
Pivot Bar
Rear Swingarm
Pivot
Cross-Member
5/16-18 X 5/8 Socket
Head Cap Screws
Center Bushing Assembly
Rear
Swingarm
