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Old 11-23-2017, 05:50 AM   #1
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Hyd coolers,

Need the direction of flow ,2002 Dutch Star, Newmarket ,350 Cummings.
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Old 11-23-2017, 06:00 AM   #2
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Hello and
Fan pulls air across the radiator stack towards the engine........on side radiator's
Rear radiator's, some posts I have read, owner's say some blow out the back, and others say air in the back blowing towards engine, most rear setups blow out the back..........Mine is a side setup.
2012 Essex 4544 2011 Jeep JK, M&G Braking, 2014 MTI 27' Hog Hauler, Wireless brake control, 2006 Ultra & 1989 Springer
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Old 11-23-2017, 09:56 AM   #3
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Sorry, I meant the flow of the hyd fluid ,I'm replacing the coolers, due to a radiator and fan failure , rear diesel pusher with side mounting raderator ,there 2 of them and one says use first,so I'm thinking the first one downstream from the pump..
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Old 11-23-2017, 10:09 AM   #4
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Hi ! Welcome to IRV2! We're sure glad you joined the gang!

Can't answer your question but wanted to say hello! Keep her between the ditches!

Good luck, happy trails, and God bless!
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
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Old 11-23-2017, 10:58 AM   #5
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A 2002 DS probably has a Freightliner chassis. Give FCCC a call (800-FTL-HELP, 24/7) and ask. Have the last 6 digits of the VIN handy so they can verify your specific chassis specs. If it's a Spartan rather than Freightliner, call them during regular business hours..
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Old 11-23-2017, 11:44 AM   #6
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An oil cooler has to be self-purging so there is no air pocket in the cooling tubes. For a cooler with a top and bottom fitting, the bottom would be oil in and top out. The pump will feed into the bottom and any air will be pushed out the top outlet as the oil fills and flows. If the fittings are at opposite ends and at same height the cooler is mounted so the fittings are at the top with inlet and outlet not as critical, so oil flows in fills to cooler and removing air before oil flows out the top.
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Old 11-23-2017, 11:53 AM   #7
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Good discription from last post finding the inlet and outlet.

Just a point, if you follow the lines, it will be rare that the cooler is on the high pressure side of the system. Coolers typically cool the returning oil, before re-entering the tank. They would need to be overbuilt and heavy to handle 2000+ psi of pressure.
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Old 11-23-2017, 06:12 PM   #8
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Thanks,you guys are great,that makes sense to me. The stock hoses are 750psi, I thought that was low for Hyd lines ,thanks again
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