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The 3pt works with cams and followers. There is rust underneath which the spring cannot overcome.

You give a very clear description that makes it easy to pinpoint the problem:

Lift the 3pt cover off and spray thoroughly with penetrating oil, then test on the workbench with compressed air till its freed.

Assemble back, with new o rings around the standpipe that brings the oil up from the lower diff housing

[QUOTE="Renze, post: 19490, member: 19"] The 3pt works with cams and followers. There is rust underneath which the spring cannot overcome. You give a very clear description that makes it easy to pinpoint the problem: Lift the 3pt cover off and spray thoroughly with penetrating oil, then test on the workbench with compressed air till its freed. Assemble back, with new o rings around the standpipe that brings the oil up from the lower diff housing [/QUOTE]

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