Hydraulic oil cooler

[dodge85rc]

you dont need a cooler that can flow your total gpm... have the return line T with the full size return line and a smaller (say 3/8 or 1/2 in) line the runs through the cooler and then Ts back into the return line. like so:

...just saw someone else brought up bypass cooler. then use a standard automotive size and you should price up one relativity cheap.

do you think JD uses a cooler that can flow 50GPM?... not to my knowledge.

also i dont see why restricting return line flow and causing excess back pressure a good thing? if its to "force" more oil into the cooler. I doubt it will add any cooling performance other than hamper pump output. not to mention building pressure and working the pump harder adds heat.

don't search for hydraulic coolers specifically.. just go by oil coolers. and you will have a much bigger selection with cheaper prices. to get an idea try racing sites like summit or jegs.. get the model number and shop around like on amazon and 9 time out of 10 you can find the same product cheaper.

That does change my options then to go that route, in that plumbing configuration. That drastically brings the cost down.

 

[IceStationZebra]

"also i dont see why restricting return line flow and causing excess back pressure a good thing? if its to "force" more oil into the cooler. I doubt it will add any cooling performance other than hamper pump output. not to mention building pressure and working the pump harder adds heat."

It depends on the exact parts being used, but you are almost certainly going to get more cooling by putting a restriction inline. The oil will take the easiest route back to tank, and an open line has a lot less restriction than an oil cooler. (especially tranny coolers for a 3/4t pick-up with -4 lines) Do you need full flow....certainly not. You might get enough flow by orienting the Tee's such that the flow has a straight shot into the cooler, but has to take a 90° turn to get into the straight section.

As far as excessive back pressure goes, that is a concern if you block the line too much. That is why I recommended not exceeding 30-40psi when cold at full engine speed. Once the oil warms up the pressure will drop to 5-15psi and will not hurt system performance. (filter blockage pressure alarms/gauges, if present, are usually set for 30-40psi.)

In general a bypass cooler is not as easy to install because you have to tweak the pressure balance to get adequate performance. The benefit is that you can get away with a cheaper cooler.

And for your information I know that these types of systems are used on off-road machines straight from the OEM. I was personally involved with at least 5 different designs.

ISZ

 

[GE222]

I had to replace the oil cooler on an old CASE skid steer many years ago. I got a new one at Grainger. The OEM unit was three times the cost.

Here is one to consider from them.

 

[killdozerd11]

you dont need a cooler that can flow your total gpm... have the return line T with the full size return line and a smaller (say 3/8 or 1/2 in) line the runs through the cooler and then Ts back into the return line. like so:

...just saw someone else brought up bypass cooler. then use a standard automotive size and you should price up one relativity cheap.

do you think JD uses a cooler that can flow 50GPM?... not to my knowledge.

also i dont see why restricting return line flow and causing excess back pressure a good thing? if its to "force" more oil into the cooler. I doubt it will add any cooling performance other than hamper pump output. not to mention building pressure and working the pump harder adds heat.

don't search for hydraulic coolers specifically.. just go by oil coolers. and you will have a much bigger selection with cheaper prices. to get an idea try racing sites like summit or jegs.. get the model number and shop around like on amazon and 9 time out of 10 you can find the same product cheaper.

FYI

I hate to point this out but the oil would fill the cooler like a tank and would go to static flow.....Won't work like you want.
This would work more like a heat sink on a electrical circuit

The input tee would have have a smaller orifice on the one leg to force more flow through the cooler other wise it would be pretty much worthless

And oil coolers have an insert in those tubes so that the oil is forced to flow against the inside wall of the tube so it will cool...Those are not just a hollow tube so there is a flow restriction that goes with those also