GMC 1982 Light Duty Truck Service Manual page 388

3 D -6 REAR SUSPENSION
Fig. 3D-15--Rear Spring Hangers-G Models (Cutaway
Fig. 3D-16-Rear SPring Installation - G MOdels
(Cutaway Vans)
Vans)
3. Jack frame as required to align spring and shackle with
spring hangers.
4. Install shackle bolt and nut and again reposition spring,
if necessary to align front eye. Install front eye bolt and
nut. Torque hanger and shackle nuts to specifications.
Make certain that the bolts are free-turning in their
bushings prior to torquing.
5. Lower vehicle so that weight of vehicle is on suspension
components and torque U-bolt nuts to specifications.
6. Lower vehicle and remove from hoist.
U-Bolt and Anchor Plate Installation
Fig. 3D-23 illustrates the m a n d ato ry sequence of
tightening U-bolt nuts.
NOTICE: See N O T I C E on page 1 of this section,
regarding "U "-B olt fasteners.
SHACKLE REPLACEMENT
1. Raise vehicle on hoist. Place adjustable lifting device
under axle.
2. Remove load from spring by jacking frame.
3. Loosen spring-to-shackle retaining bolt, but do not
remove.
4. Remove shackle-to-frame bracket retaining bolt then
remove shackle bolt from spring eye.
5. Position shackle to spring eye and loosely install
retaining bolt. Do not torque retaining bolt at this time.
6. Position shackle to frame bracket and install retaining
bolt. Arrow stamped on shackle must point forward.
7. Rest vehicle weight on suspension components and
torque both shackle
specifications.
NOTICE: See N O T I C E on page 1 of this section,
regarding these fasteners.
8. Lower vehicle and remove from hoist.
bolt retaining nuts to