Re: Slow hydraulics on Ford 641D

Posted by souNdguy on June 13, 2006 at 05:46:59 from (12.65.216.89):

In Reply to: Slow hydraulics on Ford 641D posted by Hal/WA on June 12, 2006 at 19:52:34:

Milky hyd oil.. especially overfull milky hyd oil almost always means water entrapment ( emulsion)... One thing to watch out for though is air entrapment.. it will cause foamy white hyd oil that is higher apparent volume as well. Air entrainment is from a leak on the suction side.. pinhol in a line.. or a bad oring.. shaft seal.. etc.

This will cause the white hyds.. and slow operation.. and will / can cause cavitation in the system which is detrimental to the pump.. etc.

If the oil whites and foams back up.. look for a leak.. ( or lots more water in the sump and system.. )

Soundguy

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