REMOVAL & INSTALLATION
1997-98 F-Super Duty Only
If the linkage is disconnected from the valve, the proper setting of the valve will be lost and a new valve will have to be installed. The new valve will have the shaft preset and secured internally. If the shaft of the new valve turns freely, DO NOT USE IT!-The valve cannot be repaired or disassembled. It is to be replaced as a unit.-If the linkage is damaged or broken and requires replacement, a new sensing valve will also be required.
- Raise and support the rear end on jackstands.
- Raise the frame to obtain a clearance of 6 5 / 8 in. (168.3mm) between the bottom edge of the rubber jounce bumper and the top of the axle tube-on BOTH sides of the axle. The is the correct indexing height for the valve.
- Remove the nut holding the linkage arm to the valve and disconnect the arm.
- Remove the bolt holding the flexible brake hose to the valve.
- Disconnect the brake line from the valve.
- Remove the 2 mounting bolts and remove the valve from its bracket.
- Place the new valve on the bracket and tighten the mounting bolts to 12-18 ft. lbs. (16-24 Nm).
- Install the brake hose, using new copper gaskets and tighten the bolt to 28-34 ft. lbs. (38-46 Nm).
- Attach the brake line to the lower part of the valve.
- Connect the linkage arm to the valve and tighten the nut to 8-10 ft. lbs. (11-13 Nm).
- Bleed the brakes.
When servicing axle or suspension parts which would require disconnection of the valve, instead, remove the 2 nuts that attach the linkage arm to the axle cover plate. This will avoid disconnecting the valve and avoid having to replace the valve.