Section 4  - Rear Axle, Universal Joints & Springs

Inlox Bushings
The front ends of the rear springs on all pas­senger cars are mounted in "Inlox" rubber bush­ings, Fig. 64.
Rear Spring Shackle
Two different design spring shackles are used at the rear end of the passenger car rear chassis springs. Approximately half of the cars will be equipped with the threaded bushing and tapered pin type, while the balance will contain the rubber-bushed type shackle. Either shackle assembly is interchangeable with the other on any of the pas­senger cars.
All 1/2-ton trucks are equipped with the threaded bushing and tapered pin type rear spring shackle.
Threaded Bushing Type Shackle
To replace the threaded bushing raise the car with a chain hoist just enough to relieve the spring tension. Remove the draw bolt and the shackle plates. Unscrew the shackle pins from the bushings. The threaded end of the bushing removing and re­placing tool J-553 should be screwed into the threaded bushing. Turning the pull nut on the tool with a wrench will remove the bushing.
To install a new bushing insert the threaded end of the tool through the spring eye or spring hanger and screw a new bushing on the shaft of the tool. Turning the pull nut on the tool will draw the bushing into place. Screw a new shackle pin into the bushing until each end projects 21/32" from the end of the bushing. Place the four cork gaskets over the ends of the pins and assemble the shackle plates. Insert the draw bolt and draw the nut up snugly. Strike each end of the shackle a sharp blow with a hammer to insure seating of the tapers and retighten the shackle bolt.
Examine the lubrication fittings for damage. Re­place them when necessary and fill the pins com­pletely full with chassis lubricant.
Rubber Bushing Type Shackle
This type shackle assembly. Fig. 66, consists of the outer shackle plate with both pins serrated through the plate and swaged in place, two syn­thetic rubber bushings (each in two halves), the inner shackle plate and the two special lock nuts.
Fig. 64—Inlox Bushing
These bushings consist of an internal steel tube having a bead rolled on its circumference at the center, a tubular outer retainer having rounded ends, and a rubber bushing securely molded be­tween these two steel members.
These Inlox bushings require no lubrication and no attention other than to keep the bolt drawn up snugly.
To remove and replace the Inlox bushing in the spring eye a special press is necessary. To remove the bushing, place the press in position as shown in Fig. 65, with the adapter plug inside the bush­ing. Turning the screw with a wrench will force the
Fig. 65—Inlox Bushing Press
bushing from the spring eye. To replace the bush­ing, set up the press around the spring eye, then in­stall the adapter in the new bushing and place the bushing and adapter in the press, with the bushing lined up with the spring eye. Turning the screw will force the bushing into position.
Fig. 66—Layout of Rubber Spring Shackle Parts





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