Power for my backhoe: Back Hoe  -- Tractor Attachments Implements 3ph Discussion Forum and Review Power for my backhoe: Back Hoe -- Tractor Attachments Implements 3ph Discussion Forum

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 08-31-2004, 10:54 Post: 95064
Rick
2004-08-31 10:54:25
Post: 95064
 Power for my backhoe

I recently purchased a grey market Shibaura SD1840 tractor with front loader. I found a backhoe attachment brand new and all it needs is the hydraulics to power the unit. I'm inclined to find a pto pump and a reservoir for the power versus adding to the tractor's existing hydraulic pump. Anyone have or know where I can get a cheap PTO pump and reservoir? I'm a newbie with tractors so any advice concerning the hydraulics, 3PT hitch, or PTO operation would help me as well. I didn't get any manuals with the tractor or the backhoe attachment.






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 08-31-2004, 11:40 Post: 95070
shortmagnum

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 Power for my backhoe

Rick, I just did the same thing. Northern tool (formerly Northern hydraulics) sells the Prince PTO pump for $350. I also ended up getting a 10 gal tank and inline filter and suction strainer there for another $110. They are not the cheapest place but they have a store right in town and the difference was not that much. I still need about 6' of pressure line and about the same return line distance.

Some of the grey market tractors run their PTOs at 1000 rpm. They make one for that speed also.
David






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 08-31-2004, 18:35 Post: 95135
oneace

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 Power for my backhoe

WARNING: Any 3pt back hoe should be used with extreme caution. You may end up turning your one tractor in to two.






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 09-01-2004, 15:12 Post: 95281
dfkrug



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 Power for my backhoe

You can use the tractor's hydraulics if you can access the loader valve "IN" hydraulic line, placing the b/h stack valve in series with the loader valve, upstream. If the loader valve has a marked power beyond port, the hoe's valve can be plumbed in series downstream of the loader valve.

As stated, if your hoe does break the tractor in half, it can rip out the toplink bracket.

Which hoe is it?






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 09-01-2004, 16:00 Post: 95286
shortmagnum

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 Power for my backhoe

I don't know the hydraulic pump output of the Shibaura Rick is talking about but the Prince PTO pump puts out over 11 GPM. That's half again what my 3130 puts out. This is the same setup that the previous owner had when I tried it out(he wouldn't sell me the pump) and I wouldn't want it to work any slower.

Yes, you can damage anything by attempting things it was not designed for. If the BH works as I hope it does, I plan on fabricating an extension on the loader frame.
Dave






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 09-01-2004, 16:33 Post: 95289
dfkrug



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 Power for my backhoe

Shortmagnum, your 3130 is rated at 8.3 gpm for the implement hydraulic pump. I assume that spec is at the same RPM that will give you 540 RPM at the PTO. It is also plenty of flow for most CUT hoes. Most CUTs give you 6-9 GPM, which is more than adequate. With a PTO pump, using the 540 speed, you will have to race the engine at the speed required to give you the rated flow. Because of this, some PTO pumps have gear increasers to give you a good flow at a lower engine RPM. A 1000 RPM PTO option is a very good thing, if you don't have an increaser pump.

BTW, Kubota sells an adapter for $90 that allows you to plumb into the tractor hydraulics just below the right side of your seat.






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 09-02-2004, 08:17 Post: 95352
shortmagnum

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 Power for my backhoe

dfkrug, there were other issues for me. The hoe has gone through a couple of previous owners so I was a bit worried about hydraulic oil contamination. I suppose I could clear it out OK but how many $25 jugs of oil will that take? Another is that the hoe is not set up for power beyond. For me that means taking it to a shop somewhere and another couple of hundred $$. Also, I have some other uses for it that will require 10+ GPM so it made the most sense to me.

FYI: this pumps 11+ GPM at 540 RPM. I don't see the need to "race" the motor any more than with the Kubota pump. If anything, as long as it's making enough horsepower, I might be able to back off the rpm a bit and still put out 6-9 GPM.






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 09-02-2004, 15:08 Post: 95388
dfkrug



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 Power for my backhoe

Your tractor only needs 10-15hp to run the hydro pump at the rated volume up to the relief pressure. Therefore, running the engine slower is a desirable thing (noise, stench, engine wear).






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 09-06-2004, 07:46 Post: 95685
rhellerjr



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 Power for my backhoe

dfkrug I got the hoe off of ebay manufactured new by atvmotorsports with all heavy duty parts. It didn't come with any power source. When you and another respondent say be careful not to rip my tractor in half, what is meant exactly? I'm planning on digging out stumps and doing some trenching with this hoe for my own personal use. Can you tell me what I need to do to run the PTO? It's got 3 speeds and I'm a newbie to tractors.






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 09-06-2004, 08:21 Post: 95687
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 Power for my backhoe

The 'hoe breaks the tractor in half' thing is mostly related to 3ph mounted hoes but sub-frame mounted ones aren't bomb proof either. Tractors really are designed for pulling things. A hoe with its long arms has a lot of leverage that applies loads in ways that tractors aren't specifically designed for.

I've used a 3ph hoe for about six years for occasional moderate work without apparent damage to the tractor. It's not an especially large or strong hoe for the tractor but I take care not to use it aggressively and our soil is sandy here. No guarantees that my experience would be the same for anybody else though.






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