Re: H Oil Pressure

Posted by Irv on February 01, 2004 at 13:51:22 from (205.188.209.82):

In Reply to: H Oil Pressure posted by BB on January 31, 2004 at 19:01:33:

I rebuilt the oil pump in my H several years ago. The gears are hardened, so the will wear less than the pump body, which is cast iron. These geared pumps will always push the gears to the top of the pump - into the cover. If you take the cover off you will see the marks the gear makes. To rebuild it - take the cover off. See if there are any shims under the cover. The headspacing in the pump is important. Usually there is one paper shim here. Take the cover to a machine shop - have the inner surface ground flat - Then reassemble - if the gears are tight - put a shim in - the thinner the better. An .001 increase in headspace can cause a signifigant loss in pressure. You can see some difference when the oil gets hot, but this fix has worked on mine for years. Irv

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