HD Chassis
REMOVAL PROCEDURE1. Raise the vehicle on a hoist. Support the rear axle independently in order to relieve the tension on the leaf springs.
2. Remove the U-bolt nuts.
3. Remove the washers.
4. Remove the anchor plate.
5. Remove the Unbolts.
6. Remove the spacer. Loosen the shackle to spring nut.
7. Remove the following parts:
^ The shackle
^ The shackle to rear bracket nut
^ The washers
^ The bolt
8. Remove the spring to front bracket.
9. Remove the following spring to front bracket parts:
^ The nut
^ The washers
^ The bolt
10. Remove the spring assembly from the vehicle.
INSTALLATION PROCEDURE
1. Install the spring assembly to the vehicle.
2. Install the following spring to front bracket parts:
^ The bolt The washers
^ The nut
- Do not tighten the nut.
3. Install the following parts:
^ The shackle
^ The shackle to rear bracket bolt
^ The washers
^ The nut
- Do not tighten the nut.
4. Install the spacer.
Important: Do not use old U-bolts.
5. Install the new Unbolts to the top of the spring.
6. Install the anchor plate.
7. Install the washers.
8. Install the nuts.
Tighten
8.1. Tighten the Unbolt nuts in the sequence shown.
8.2. Tighten the Unbolt nuts to 148 Nm (109 ft. lbs.).
8.3. Adjust the spring height between the top surface of the axle jounce pad and the bottom surface of the frame jounce bracket.
8.4. Tighten the leaf spring to bracket nuts to 415 Nm (306 ft. lbs.).
8.5. Tighten the leaf spring to shackle nut to 213 Nm (157 ft. lbs.).
8.6. Tighten the shackle to bracket nuts to 213 Nm (157 ft. lbs.).