REMOVAL & INSTALLATION
See Figure 1
- Raise the vehicle with a jack under the axle and place a jackstand under the frame side rail. Then lower the axle jack so that the load is relieved from the spring and the wheels rest on the floor.
- Remove the nuts which secure the spring clip bolts. Remove the spring plate and clip bolts. Free the spring from the axle by raising the axle jack.
- Remove the pivot bolt nut and drive out the pivot bolt. Disconnect the shackle either by removing the lower nuts and bolts on the rubber bushed shackles, or by removing the threaded bushings on the U-shackles.
- To replace, first install the pivot bolt. Then, connect the shackle using the following procedures.
- On bronze-bushed pivot bolts, install the bolt and nut and tighten the nut. Then back it off two cotter pin slots and install the cotter pin. The nut must be drawn up tightly but must be sufficiently loose to allow the spring to pivot freely. Otherwise the spring might break.
- On rubber-bushed pivot bolts and locknuts (or lockwasher and nut) only tighten the bolt enough to hold the bushings in position until the vehicle is lowered from the jack.
- Connect the shackle. On rubber bushed shackles install the bolts as in Step 6. For U-shackles, insert the shackle through the frame bracket and eye of the spring. Holding the U-shackle tightly against the frame, start the upper bushing on the shackle, taking care that when it enters the thread in the frame it does not crossthread. Screw the bushing on the shackle tightly against the spring eye, and thread the bushing in approximately half way. Then, alternately from top bushing to lower bushing, turn them in until the head of the bushing is snug against the frame bracket and the bushing in the spring eye is 1 / 32 in. (0.794mm) away from the spring as measured from the inside of the hexagon head in the spring. Lubricate the bushing and then try the flex of the shackle, which must be free. If a shackle is tight, rethread the bushings on the shackle.
- Move the axle into position on the spring by lowering or raising the axle jack. Install the spring clip bolts, spring plate, lockwashers, and nuts. Tighten the nuts to 50-55 ft. lbs. (68-75 Nm). Avoid overtightening. Be sure the spring is free to move at both ends.
- Remove both jacks. On rubber bushed shackles and pivot bolts, allow the weight of the vehicle to seat the bushings in their operating positions. Then torque the nuts to 27-30 ft. lbs. (37-41 Nm).
- Raise the front of the vehicle with a floor jack under the front axle, then safely support the fame of the vehicle on jackstands.
- Slowly lower the front axle until the spring tension is relieved, then position 2 additional jackstands under the axle assembly. At this point both the vehicle's frame and the front axle assembly should be supported by jackstands.
- Support the spring and disconnect the spring eyes at the knuckle supports.
- Remove the spring from the vehicle.
- Installation is the reverse of removal. Centralize the spring eye in the lower end of the knuckle support before starting the threaded pin. Tighten the pivot bolts to 35 ft. lbs. (48 Nm).