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Backhoe Hydraulic Hose Line Set up
just finished making a backhoe attachment for my tractor a john deere 750 w/fel. Now I need to plum it, need to know how to tie it into the tractors hydraulics. would really appreciate any and all info.
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Backhoe Hydraulic Hose Line Set up
Barney,
I don't know if it means anything to you, but an easy way to do this is to install a remote hydraulic fluid reservoir, along with a PTO driven pump to power your backhoe.
It's a very simple setup, but the best part is that you'll probably get better performance from the backhoe with the added flow available from the PTO powered pump. Works great. Plenty of flow available for most anything hydraulic.
Joel
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Backhoe Hydraulic Hose Line Set up
Barney0364,
I just checked the specs on the John Deere 750. You've got a 20hp engine. I believe your tractor's hydraulic pump will supply about 4 gallons per minute.
A backhoe typically employs 3 hydraulic cylinders simultaneously. With only 4 gallons per minute (just a rough guess), your backhoe might seem slow and sluggish to you....depeding upon the size of the cylinders you used.
If you were to use a rear mounted PTO pump sized properly for your tractor's rated PTO horsepower, rather than the tractor's internal hydraulic pump, you could nearly triple the number of gallons per minute available to your backhoe.
I believe this would be the better choice for a tractor like the JD 750.
Joel
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Backhoe Hydraulic Hose Line Set up
thanks for responding. It would be a little slow to say the least, you also have your two swing cylinders. I just was drawing a blank, forgot about the pto and using a pump. I just need to add some brackets for the reseivor and a filter to the frame and bob's your uncle. thanks Joel I'll post some pics soon of the tractor with backhoe thanks again.
barney
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Backhoe Hydraulic Hose Line Set up
Barney0364,
There are many different pump brands to choose from, but Prince is a highly respected name in the hydraulics world. Your tractor puts out about 18 PTO horsepower. Therefore, the proper pump for your backhoe and tractor would be the Prince HC-PTO-2A (See the link below). You'll also need a torque bar kit, to keep your pump from spinning.
If I understand you correctly, you have two stabilizer cylinders; two swing cylinders; three additional cylinders on the arm; making a total of 7 cylinders.
You'll need to size your reservoir properly for operation of all of these cylinders, as well as to allow enough fluid in reserve to allow time for proper fluid cooling.
General rule of thumb = Pump flow rate (in gallons per minute) x 2
In other words, if your pump puts out 11 gallons per minute, you should have a reservoir no smaller than about 22 gallons.
I'd go a little bigger, since you'll have a couple of gallons stored in the extended stabilizer cylinders.
A 25 gallon reservoir should work great for you.
Joel
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Backhoe Hydraulic Hose Line Set up
candoarms,
If seem other setup use like 5 to 7gpm pumps and about the same size reservoir. What do you think about that setup? I've seen some pumps on ebay and I'm looking locally as well. I have a cooler that I well be using so heat should not be a factor.
And yes I have a total of seven cylinders, you can say they where on sale that day.
All I really need is to find pump and reservoir. Thanks Joel for all the info.
Barney
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Backhoe Hydraulic Hose Line Set up
Barney,
You don't have to go with the biggest pump you can find. A 7 gallon per minute pump will nearly double the output available from your tractor's internal pump. This would be a great improvement.
Additionally, if you go with the 7 gallon per minute pump, you should be able to get away with using a smaller reservoir, as well. Since you have a cooler installed, you might be able to get away with using only a 10-12 gallon reservoir.
Keep us posted.
Joel
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Backhoe Hydraulic Hose Line Set up
Barney,
I forgot to mention something very important.
A whole lot of equipment is sold with undersized reservoirs installed. I don't know why they do this. It's just plain stupid.
Proper fluid cooling is extremely important to the life of the pump, spool valves, cylinder seals, hoses, etc. Adding a little extra fluid capacity greatly aids the needed cooling time.
Hydraulic fluids can get HOT. Summer heat only makes matters worse. Go with a bigger reservoir. You don't need overkill here, but even with a cooler in place I wouldn't go any smaller than 10 gallons.
Joel
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Backhoe Hydraulic Hose Line Set up
Ok, Gee I guess I can help because I had the exact same problem when I built my BH (CaDDigger 608 3-4 gpm)for my JD650. I have a FEL, power steering and of course the 3 point hitch. The local JD dealer was no help at all. The little 16 HP JD system runs the backhoe just fine, believe me you do not need speed with a BH, especially one on a small tractor. Mine works just fine, did landscaping project and dug in a sewer line.
First you need a control valve for your BH that has a power beyond port, in addition to the In and Out ports. Might need to purchase a couple fittings in addition to the 3 hoses. When the BH is removed two hoses needs to be jumped with a short hose so the 3 point will work. I think I had maybe $100 in fitting cost over and above the cost of the hoses and couplers which you need even with a PTO Pump.
If you still want to continue with this let me know, I will either send you or post the drawing I made for my system.
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Backhoe Hydraulic Hose Line Set up
wmgeorge,
well thank you for answering the post. I already have a parker control valve but I'm looking for a power beyond for that control valve, just been so busy. I know JD dealer was no help saying that the kit for my 750 was no longer available. I would apprecite any info and help thank you.
Barney
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