I bought a Colony made in the USA rebuild kit for a 1941 ULH oil pump. I measured the pressure regulator spring and found it to be the same length as the free length spec in the manual, but the ball check springs are nearly a half inch longer than the manual recommends. I wonder if this could pose a problem at idle as the ball check to the pinion shaft/crank pin is to open at about 1.5 PSI. I don't know if this oil pump will create enough pressure at idle to open this ball check with the longer spring?
The old springs were collapsed by 0.1'' with wear on the spring itself. I'd rather not use them in case they break on the worn spots. I tried to stretch them to OEM length but of course over stretched them.
I wonder if I should cut the new springs to the service manual free length spec and put the factory end of the spring against the ball check and the cut end into the cap.
Thanks for any input.
Pete:::::::::::;;;;;;;;;;;;;
The old springs were collapsed by 0.1'' with wear on the spring itself. I'd rather not use them in case they break on the worn spots. I tried to stretch them to OEM length but of course over stretched them.
I wonder if I should cut the new springs to the service manual free length spec and put the factory end of the spring against the ball check and the cut end into the cap.
Thanks for any input.
Pete:::::::::::;;;;;;;;;;;;;
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