type spring shackle is used at the front of the front spring on the 1/2
all 3/4 and 1-1/2-Ton Truck Models.
In this design threaded bushings
are pressed into the spring hanger and into the eye of the spring. Threaded pins with tapered ends are screwed
into the bushings with each end projecting the same distance. The
shackles are plain, heavy gauge steel stampings with tapered holes which fit
tightly on the tapered ends of
the pins. A draw bolt, having a
square shoulder under its rounded head, engages each outer shackle
plate. A nut at the inner side of each
inner shackle plate serves to draw both inner and outer shackles snugly on
the pins. Fig. 49.
are drilled from their outer ends to the center where a cross hole connects it
with the threaded portion.
Lubrication fittings are assembled in the end of each central hole to
provide for lubrication of the
threads. Cork washers are assembled at each end between the shackle and
the hanger and between the
shackle and the spring, to
retain the lubricant in the threaded portion.
this shackle, being tight on the tapered pin end, oscillates the pin
in the threaded portion. This design
uses all of the relatively large threaded surface for a bearing, reducing
wear to a minimum and insuring long bearing life to these parts.
becomes necessary to remove these bushings from either the spring rear eye or the
spring hanger, remove the draw
bolt and the shackles. Unscrew
tapered pins from the bushings and thread the end of the J-553 rear
spring shackle bushing tool into the
bushing. Turning the pull nut with a wrench will remove the
a new bushing, insert the threaded end of the J-553 rear spring shackle
bushing tool through the
spring eye or spring hanger and screw on a new bushing, until it is
centered up with the hole in
the spring eye or spring hanger. Turning on the pull nut will press this
bushing into place.
Inspect the pin that was removed
from the bushing and if it is worn, replace with a new one.