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  #1  
Old 11-10-2015, 07:56 PM
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cosworth34677 cosworth34677 is offline
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Default Heat exchanger

What would be a cool thing to use as heat exchanger? Make something out of brass?use a pc cooling radiator? Or just use a huge tank? Any ideas? Also do you put this heat exchanger before the pump after the pump, before it goes into the cylinders or before it goes into the tank?
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Old 11-10-2015, 08:20 PM
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Default Re: Heat exchanger

What do you need this heat exchanger for buddy?
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Old 11-10-2015, 08:35 PM
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Default Re: Heat exchanger

Quote:
Originally Posted by chris deacon View Post
What do you need this heat exchanger for buddy?
Trying to help cool my blazing hot pump and oIl in my excavator, the pump it get stupid hot ! Almost can't touch it hot.
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Old 11-10-2015, 08:41 PM
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Default Re: Heat exchanger

Would seem logical to put it in the return line before the oil goes into the tank.
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Old 11-10-2015, 08:50 PM
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Default Re: Heat exchanger

Quote:
Originally Posted by cosworth34677 View Post
Trying to help cool my blazing hot pump and oIl in my excavator, the pump it get stupid hot ! Almost can't touch it hot.
Well to me it seems as though you are trying to treat the symptoms rather than cure the problem. Simple matter of fact is something must be wrong with your setup mate.
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Old 11-10-2015, 11:41 PM
avel avel is offline
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Default Re: Heat exchanger

I agree with chris deacon. But...... do you at least have a fan blowing over the components?
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Old 11-11-2015, 04:29 AM
Rimrock Rimrock is offline
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Default Re: Heat exchanger

Sorry, but in my opinion, the main problem here is basically the typically 'cheap equipment' issue. Looks to be the same pump as in the Magom Bruder excavators, which many owners have had issues with, at least the early versions.
Cheap pump => low low efficiency => crazy high rpm constantly => hot hot hot (if the pressure is abnormally high, caused by some obstructions in the system that should not be there, or system pressure set too high, one can add another; 'hot', or two.. )

- Try reduce the system pressure to a point you got enough forces in the cylinders, but not more than that..Adjust the 'pressure relieve valve', if it exists in the system/pump..If it's even not there...well, there you go..)

- I would possible also try to do some mix operations on the radio; let the pump rpm down to e.g. 10-30% of max speed when no valves are operating (as soon as one of the valve servoes are moving, pump motor speed goes to max)

- Installing a compact PC cooler and fan in the system, on the return line before the tank, can help reduce the heat. A larger tank will also be helpful (not as much as a cooler). Even a fan blowing air out of the machine house will help a bit.

- Magom offers a heatsink incl. fan for your motor. Can help a bit.

- The early Magom systems was made to operate with brake fluid, not oil. Don't know what you're using.

- Evaluate replacing the old pump with the latest Magom version with a brushless motor (not the 900 ml pump..way too big here..) With or without tank as you wish..

Last edited by Rimrock; 11-11-2015 at 04:38 AM.
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Old 11-11-2015, 12:12 PM
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Default Re: Heat exchanger

http://www.rcspecialequipment.com/1/...i_9823924.html


http://s10.postimg.org/43290nbax/Rad...4_attacchi.jpg
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Old 11-11-2015, 01:07 PM
JAMMER JAMMER is offline
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Default Re: Heat exchanger

FreddyGearDrive made an exchange way back when. Ed
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Old 11-11-2015, 08:38 PM
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Default Re: Heat exchanger

Thanks guys for the info, love that one in the link
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Old 11-11-2015, 10:35 PM
andyathome andyathome is offline
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Default Re: Heat exchanger

or gut an old PC that has water cooling and use that as a radiator/heat exchanger, that way is almost guarantied not to leak .

personally I would use a bigger tank and slow the motor down, and fit a pressure bypass.
my 4200 is running at half the speed it came with, twice as long run time and no heat issues, leaks have almost become non-existent.

cheers andy
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Old 01-31-2016, 10:32 AM
thetractorfan thetractorfan is offline
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Default Re: Heat exchanger

if the oil is hot, change the oil. if it is dark, contaminants may be clogging up the system, making pressure causing heat. a proper sized pc radiator should do, you don`t want the bearings in your pump to burn out.
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