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Old 13-09-20, 05:13
Malcolm Towrie Malcolm Towrie is offline
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Location: Whitby, Ontario, Canada
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Default HUP C8A front suspension shackle pins

Im involved in restoring a HUP and came across the unusual and quite clever threaded shackle pins and bushings used on the front axle. One bushing/pin was damaged so I looked for a new one, but couldn't find one, perhaps due to my crap search skills.
We have another 8 cwt HUP-type vehicle in our boneyard so I checked that out. It has what I consider to be a crude upgrade to the original design, namely a thin brass sleeve pressed into the rear spring eye, with a 3/4" bolt installed in the bushing with a nyloc nut fitted to prevent having to torque up the bolt and lock up the shackle. The upper shackle mount has a nylon bush fitted with a 5/8 or 11/16" bolt, again with a nyloc nut. There is no provision on either bolt for greasing.
Is this an accepted upgrade?
Malcolm
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Old 18-09-20, 04:46
Malcolm Towrie Malcolm Towrie is offline
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Default

I ended up making a steel bushing 0.880" OD x 0.630" ID that press-fitted into the 0.875" spring eye, and machining tapered ends on a 5/8" pin that matched the tapered holes in the shackle plates. I drilled from one end through to the centre of the pin and cross-drilled for grease injection, with the drilled hole tapped for a 1/4"-28 grease nipple.
Malcolm
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