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International Automotive Technicians Network
Re: dd13 low oil pressue
Posted to HD/Fleet Forum on 8/26/2020

The only idea that comes to mind is to shim the pressure relief spring so it will bring the hot idle oil pressure up.

I have made this adjustment many times, but mostly with older farm tractors. (they were actually adjustable). I have shimmed a few oil pump r... Login to read more.