Mark VII V8-302 5.0L HO (1986)
Fig. 9 Filling Piston/Adjuster Assembly
Fig. 10 Bottoming Piston In Caliper
ASSEMBLE
1.
Coat new caliper piston seal with clean brake fluid and install it in caliper making certain that seal is not twisted and is fully seated in groove.
2.
Install new dust boot by seating flange squarely in outer groove of caliper bore, then coat piston/adjuster assembly with clean brake fluid and
install it in caliper bore. Spread dust boot over piston as it is installed and seat dust boot in piston groove.
3.
Install caliper in vise,
Fig. 10, and fill piston/adjuster assembly with clean brake fluid.
4.
Coat new thrust screw O-ring with clean brake fluid and install it in thrust screw groove, then install thrust screw into piston adjuster assembly
until top surface of thrust screw is flush with bottom of threaded bore, being careful to avoid cutting O-ring seal. Index notches on thrust screw and
caliper housing and install anti-rotation pin.
The thrust screw and operating shafts are not interchangeable from side to side since the ramp
direction in the ball pockets are different. The pocket surfaces of the operating shaft and thrust screws are stamped ``R'' (Right) and ``L''
(Left).
5.
Place a ball in each of three pockets of thrust screw and apply a liberal amount of silicone grease M1C-169-A on parking brake components, then
install operating shaft on balls.
6.
Coat thrust bearing with silicone grease and install it on operating shaft, then install a new lip seal and O-ring on end retainer.
7.
Lightly coat O-ring seal and lip seal with silicone grease and install end retainer in caliper. Firmly hold operating shaft against internal mechanism
while installing end retainer to prevent mislocation of balls. If lip seal moves out of position, reseat seal. Torque end retainer to 75---95 ft. lbs.
Parking brake lever must rotate freely after torquing.
8.
Install parking brake lever on keyed spline facing down and rearward. Torque retaining screw to 16---22 ft. lbs.
9.
Bottom piston using tool T75P-2588-B,
Fig. 11, and install caliper as described previously.