Firewood processor build thread

   / Firewood processor build thread
  • Thread Starter
#361  
I wouldn't worry about the 1/2" power beyond port. A single 1/2" fitting won't reduce your cycle time... Just creates a bit more friction/heat. The valves CV rating or pressure drop takes into account fitting sizes.

Flow coefficient - Wikipedia, the free encyclopedia

The ten gallon tanks does seem small. If things get too hot it might be more cost effective to add a oil cooler instead of a bigger tank and more fluid.

I heard back from the hydraulic shop and they're telling me the radiator required to handle the amount of heat I'm generating (I told them the pump size, tank size, engine size and they somehow came up with a number) would cost $2700. Now, it's an expensive place to go shopping for sure, but even the rad from Princess Auto is almost $400 and I have no idea if it can handle the heat load I'd put on it. I'm not able to find other options for oil coolers, the surplus center doesn't seem to have them and none of the others I find on line seem like they're going to work. I think the easiest thing to do it just add a bigger tank.
 
   / Firewood processor build thread #362  
I heard back from the hydraulic shop and they're telling me the radiator required to handle the amount of heat I'm generating (I told them the pump size, tank size, engine size and they somehow came up with a number) would cost $2700. Now, it's an expensive place to go shopping for sure, but even the rad from Princess Auto is almost $400 and I have no idea if it can handle the heat load I'd put on it. I'm not able to find other options for oil coolers, the surplus center doesn't seem to have them and none of the others I find on line seem like they're going to work. I think the easiest thing to do it just add a bigger tank.
Cool Line D10 12 Oil Cooler 12 VDC 2 30 GPM 0 08 HP | eBay

Cool Line D16 12 Oil Cooler 12 VDC 4 50 GPM 0 19 HP | eBay
 
   / Firewood processor build thread #363  
This is what I calculated that I'd need on my system if I were to run a 28 gpm pump and a 17 gpm pump with 20 gallons of hydraulic fluid in the reservoir.

Thermal Transfer Oil Coolers MA Series | MAX GPM 40-75 MA-12-2-4A OIL COOLER 12V MTR 258-327

Has the 12v fan and everything for $360

If you want I can try to dig out my data sheets and calculations to see what you might need. We figured that the cooler would pay for itself after the first fluid change.
I can only imagine that your fluid temps will go up from there in the summer months!
 
   / Firewood processor build thread #364  
This is what I calculated that I'd need on my system if I were to run a 28 gpm pump and a 17 gpm pump with 20 gallons of hydraulic fluid in the reservoir.

Thermal Transfer Oil Coolers MA Series | MAX GPM 40-75 MA-12-2-4A OIL COOLER 12V MTR 258-327

Has the 12v fan and everything for $360

If you want I can try to dig out my data sheets and calculations to see what you might need. We figured that the cooler would pay for itself after the first fluid change.
I can only imagine that your fluid temps will go up from there in the summer months!
I was going to post that one but the description states it's 24vdc but it says 12v as well...probably a typo.
 
   / Firewood processor build thread
  • Thread Starter
#365  
This is what I calculated that I'd need on my system if I were to run a 28 gpm pump and a 17 gpm pump with 20 gallons of hydraulic fluid in the reservoir.

Thermal Transfer Oil Coolers MA Series | MAX GPM 40-75 MA-12-2-4A OIL COOLER 12V MTR 258-327

Has the 12v fan and everything for $360

If you want I can try to dig out my data sheets and calculations to see what you might need. We figured that the cooler would pay for itself after the first fluid change.
I can only imagine that your fluid temps will go up from there in the summer months!

I guess that's another $200 in oil to go from 10 gallon to 30 gallon tank, isshh, it never ends. I'm not convinced my little 15 hp produces enough power to run a 12v fan and I'm only using a lawn tractor battery. I could change that for a deep cycle battery, but I still think it would just get run down. I have no idea how many amps the engine is putting out, but I'm betting it's not much. The site you posted has a 115v option, but it's back to the $900 range. I need to think this through a little more.
 
   / Firewood processor build thread #366  
You could put the fan on a snap switch so it's only running when the fluid gets hot. Painting your tank and cylinders white will also help a little bit if they are in direct sunlight.

The bigger tank is probably the best solution...
 
   / Firewood processor build thread #367  
The site you posted has a 115v option, but it's back to the $900 range.

If you have 115v available you could always hook up a battery changer while running the processor.
I agree that the charging system on a little engine would probably not keep up with the fan. We are hoping that our 2 engines would be able to keep up with it if we decide to go with the cooler.
And judging from what you've experienced we will likely have to unless we want to have 40 or 50 gal of fluid.
 
   / Firewood processor build thread #368  
Thats a 13.78x11.73 radiator, 161 square inches of space. Look for an aluminum tank radiator that is at least as big (some links below):
Aluminum tank car radiator $59: Amazon.com: YourRadiator RD21290A - New All Aluminum Radiator: Automotive (13 3/4x13 11/16, 188 square inches)
12" Fan $21: Amazon.com: Rev9Power Rev9_FAN12; Universal Electric Radiator Slim Fan - 12 In. Diameter: Automotive
Thermostat to power fan $17: Amazon.com: Hayden Automotive 3653 Economy Adjustable Thermostatic Fan Control: Automotive

Alternatively (for the fan), hit up a junkyard and pull the fan and fan relay out of a Volvo 700, 800, 900, 70, 90 or 80 series made between 1993 and 2001. That will get you a 2 speed fan and relay to control it (just need a temp sensor to tell it when to kick into high).
As for amps, what size are the wires coming out of the stator?

Aaron Z
 
   / Firewood processor build thread #369  
   / Firewood processor build thread #370  
The old rule of thumb was to size the tank approx 3x the average flow. Considering that your processor is not going to run all the time (ie: commercial) you could probably get away with approx 40gal vs. the 50 via the rule of thumb calculation. No matter how you slice it, 10gal is way on the small side. Its going to require quite a cooling system to work with a 10gal reservoir, and likely explains the high cost quote from the local hyd shop. Cheapest option would be going to a considerably larger tank and adding oil and maybe a cheaper ebay cooler to help drop temps if needed at a later time.
 

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