"F" Series Super Duty
- Raise rear of vehicle using body jacks to gain a clearance of 6 5/8" (168 mm) between bottom surface of each rubber jounce bumper and rear axle housing. See Fig 1. Remove nut from valve shaft, and remove leading arm.
- Remove bushing and clip from leading arm. Install new bushing and clip from linkage kit (E8TZ-2L 193-A). Rotate valve shaft one full turn in either direction. Position valve shaft with flat at bottom and parallel with ground. See Fig 1.
- Install Indexing Plate (T90T-2588-A) on valve shaft. Install so flat on indexing plate is aligned with flat on valve shaft. Indexing plate slot must be fully seated on valve shaft. Upper surface of indexing plate must rest on valve body.
- Rotate indexing plate counterclockwise until edge of indexing plate touches brake hose block. See Fig 1. While holding indexing plate in position, install leading arm of linkage over splined part of valve shaft. Fully seat leading arm onto splines. Reinstall valve shaft nut. Remove indexing plate.