Larry D

has the standard merc power steering cooler

dereknkathy

ok, it has a lot more steering fluid. that is not an issue. BUT; is it under a heavier load to steer, and does it run under load all the time? or just when moving the steering wheel? i know the steering feels very light, but it could take a lot more pump pressure to turn, and it could keep the pump pressure high even when not turning the wheel. i don't know the answer, but it is what needs to be found out to find the solution to your problem. it could be a bad saginaw or brazil valve and the setup is fine. it could be nothing is actually wrong, it just generates too much heat for that cooler...

Larry D

we are going to investigate the cooler its the standard merc 6" cooler which is on a lot of boats with no ill effects, however maybe it has a restriction or corrosion

ezstriper

ok, call AGR they build the pumps used in the marine industry, talked to them a while back on a problem, was told that the "marine" pumps used a bearing instead of a bushing because of the very issue you stated, so maybe sometime a reg car/truck pump was installed and this is the issue, now I have installed truck pumps before, switched out the pressure regulator and have had no issues, but I did buy one of their $$$$ pumps when I did my full Hyd system.

Larry D

we switched out the cooler with one that I had on shelf ( only slightly used) and replaced the high pressure line
I know we should of only done one at a time but that would have added time to put in water and test each but Problem solved now no heat at all cool to ambient air temp after 5 min 4000 rpm run , before would have been smoking

thank you all for your comments and suggestions

dereknkathy

cool beans. in this case, literally.

Griff

Glad you got it fixed.