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Tool J720 what is it?


GaWajn
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I have an Oldsmobile service manual (1953) that states to use the tool J-720 for a certain job on the front suspension. A google search shows that it it is used in earlier manuals also, but shows no photos or descriptions. Does anyone have a picture of this tool, or knowledge of what this tool is and it's intended use? Any help is appreciated.

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It is used to adjust caster. "To adjust caster, loosen clamp bolt in upper end of knuckle support. Remove lubricating fitting on front bushing of upper support pivot pin. Insert allen wrench, PN J-720 into lubricating fitting hole and turn to adjust caster".  Hope this helps.

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