SECTION 6—SIDE FRAME
45
Removing/Installing The Locking-Gas Cylinder Assembly
NOTE: For this procedure, refer to FIGURE 6.4 on page 46.
NOTE: This procedure applies to both sides of the wheelchair.
Removing
1.
Remove the walking beam assembly. Refer to Removing/Installing The Walking Beam Assembly on page 42.
NOTE: Depending on the date of manufacture, the stability lock boot will be secured to the wheelchair frame by a tie-wrap or 10-32 hex head
screw.
2.
Remove the stability lock boot.
3.
Perform one of the following:
NOTE: To improve access to the 1/4-20 X .63 socket head screws, use a long, ball head allen wrench or remove the two 1/4-20 X 5/8-inch flat
head screws and nylon spacers allowing the rear frame to tilt away from the base frame.
• Before 3/5/07 - Remove the two 1/4-20 X .63 socket head screws, spacers, and plate securing the boot plate to the base frame and
the block guide clamp (Detail “A”).
• After 3/4/07 - Remove the two 1/4-20 X .63 socket head screws securing block guide clamp to the base frame (Detail “B”).
4.
Lift the rear suspension and depress the pivot ball pin to de-activate the locking mechanism of the locking-gas cylinder.
NOTE: If the locking-gas cylinder is forced against the vertical member of the battery box and will not move, while lifting the rear suspension
to de-activate the locking mechanism, use a rubber mallet to knock the locking-gas cylinder downward to relieve force holding the locking-gas
cylinder in place.
5.
Push the locking- gas cylinder towards the rear of the wheelchair and pull the locking-gas cylinder away from the base frame.
6.
Remove the locking-gas cylinder from the base frame guide block.
7.
Repeat STEPS 1-6 if removing the locking-gas cylinder on opposite side of the wheelchair frame.
Installing
1.
Apply Super Lube Multi Purpose Grease w/PTFE (Teflon) or other silicon based grease to the pivot ball of the new locking
gas cylinder where it engages the guide block and guide block clamp.
2.
Position the pivot ball into the base frame guide block.
3.
Perform one of the following:
NOTE: Before installing, apply a small amount of Locktite 242 to the threads of the socket head cap screws.
NOTE: If the two 1/4-20 X 5/8-inch flat head screws and nylon spacers securing the rear frame to the base frame were removed when the
locking-gas cylinder was removed, re-install the two 1/4-20 X 5/8-inch mounting screws and nylon spacers after securely tightening the two
1/4-20 X .63 socket head screws.
• Before 3/5/07 - Using the two 1/4-20 X .63 socket head screws, spacers, and plate secure the boot plate to the base frame and the
block guide clamp. Torque to 75 in-lbs ± 20% (Detail “A”).
• After 3/4/07 - Using the two 1/4-20 X .63 socket head screws secure block guide clamp to the base frame. Torque to 75 in-lbs ±
20% (Detail “B”).
4.
Holding the locking-gas cylinder in position, lift the rear suspension and depress the pivot ball pin to de-activate the locking
mechanism of the locking-gas cylinder.
NOTE: If necessary, use the vertical member of the battery box to assist with compressing the locking-gas cylinder. While lifting the rear
suspension to de-activate the locking mechanism, position the loose end of the locking-gas cylinder against the vertical member of the battery
box and lift up until the locking-gas cylinder fits into the locating bracket and aligns with the circular opening.
5.
Pushing the locking-gas cylinder towards the rear of the wheelchair, position the locking-gas cylinder against the base frame
into the locating bracket so that the end aligns with the circular opening in the battery box.
6.
Install the walking beam assembly and lower pivot link. Refer to Removing/Installing The Walking Beam Assembly on
page 42.
7.
Verify stability lock setting. Refer to Stability Lock Inspection/Adjustment on page 52.
8.
Check the stability lock function. Refer to Checking Stability Lock Function on page 53.
9.
Repeat STEPS 1-8 if installing the locking-gas cylinder on opposite side of the wheelchair frame.
