Re: Hydraulic cooler

Posted by Bob M on December 01, 2004 at 06:38:21 from (151.190.254.108):

In Reply to: Hydraulic cooler posted by Dick Davis on December 01, 2004 at 03:39:13:

Dick – No way will a tranny cooler handle 1,400 psi! Nor is one likely to handle the flow required.

SOP with hydraulic coolers is to place the cooler in the pump suction line (~0 psi all the time!) or to stick a cooling loop in the hydraulic reservoir and pass engine coolant drawn from the bottom of the radiator thru it.

However adding a cooler to your 300 is only treating the symptom! The better approach is to determine and correct the root cause for the hydraulic system becoming hot. It sounds like there’s plumbing error, a priority valve hanging up, etc causing the pump relief to continually bypass oil. Otherwise a healthy hydraulic system on a 300 should run no hotter than about 120 deg or so. ...Bob M

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