SECTION 7—REAR FRAME
48
SECTION 7—REAR FRAME
Removing/Installing the Rear Suspension Assembly
NOTE: For this procedure, refer to FIGURE 7.1 on page 49.
Removing
NOTE: Place two 5-inch blocks under the battery frame to lift the frame off the ground to ease in performing this procedure.
1.
Remove the rear shroud. Refer to Adjusting the Formula CG Seating System Mounting Position on page 58.
2.
If necessary, rotate the motor up to gain access to both sets of mounting hardware.
NOTE: Before cutting the tie-wraps, note the position and orientation of the wiring harness.
3.
Cut the tie-wraps securing the motor leads, joystick cable, and any other wiring to the rear suspension assembly.
4.
Disconnect the right and left motor leads and the joystick cable from the controller.
5.
Remove the two 1/4-20 X 5/8-inch mounting screws and nylon spacer securing the rear suspension assembly to the
wheelchair frame.
NOTE: When performing STEP 6, if only one of the 1/2-13 X 1.0-inch mounting screws can be removed from the rear suspension
assembly, perform STEP 7, otherwise proceed to STEP 8.
NOTE: On most TDS SP wheelchairs, a thin screwdriver can be inserted through the pivot bar and rear swing arm to hold the pivot bar
in blace while removing the two 1/2-13 X 1.0-inch mounting screws
.
6.
Remove the two 1/2-13 X 1.0-inch mounting screws and rear pivot bushings securing the rear suspension assembly to
the wheelchair frame.
7.
If only one of the 1/2-13 X 1.0-inch mounting screws and rear pivot bushings can be removed, perform the following:
A. Compress the rear springs:
•
Block Method - Lift the rear frame assembly up and add spacers under the rear casters until the rear springs
remains compressed and the nylon spacer can be removed.
•
Clamp Method - Perform the following steps:
•
Remove the two nylon spacers and 1/4-20 X 5/8-inch mounting screws.
•
Let the rear frame assembly fall away from the battery box to create more room to work.
•
Remove the two rubber end caps and use a vise-clamp or c-clamp to compress springs until the nylon stop
can be removed.
B. Remove the pivot bar and remaining 1/2-13 X 1.0-inch mounting screw, rear pivot bushing from the rear suspension
assembly and center bushing assembly (Detail “A”).
8.
Remove the rear suspension assembly from the wheelchair frame.
Installing
1.
Position the rear frame assembly between the mounting brackets of the wheelchair frame.
2.
Perform one of the following to secure the rear suspension assembly to the wheelchair frame:
NOTE: On most TDX SP wheelchairs, a thin screwdriver can be inserted through the pivot bar and rear swing arm to hold the pivot
bar in blace while installing the two 1/2-13 X 1.0-inch mounting screws
.
•
If two mounting screws were removed - Using the two 1/2-13 X 1.0-inch mounting screws and rear pivot bushings,
secure the rear suspension assembly to the wheelchair frame. Torque to 45 ft-lbs ± 20%.
•
If one mounting screw was removed (Detail “A”) -
i.
Position the center bushing assembly between the two rear swing arms.
ii. Insert the pivot tube and the remaining 1/2-13 X 1.0-inch mounting screw, rear pivot bushing into the rear
suspension assembly and wheelchair frame.
iii. Using the remaining 1/2-13 X 1.0-inch mounting screw, rear pivot bushing, secure the pivot bar and rear
suspension assembly to the wheelchair frame.
