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I am looking to purchase a Koyker KB75 3 point hitch back hoe and put it on a 2007 Jinma 204, anyone have one of these backhoes on a Jinma, I am investagating before I jump onto this, Question one can a sub frame be purchased for one of these hoes, Question two can my rear remotes run this hoe, as there is no tank or pump with the unit, Just 3 point hitch set up and two hoses on the KB 75. Paolo
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I believe the JM 204 only has a single rear remote, which won't run a back hoe. You'd need a power beyond adapter for your loader control valve, I think.
Is this hoe a used unit? I wasn't aware that Koyker was making back hoes currently is why I ask.
My other concern, based on nothing but guesswork from the Koyker model number (the 75 part) is that you're talking about a 7-1/2 foot back hoe. I think that's a bit much hoe for a 200-series tractor and I'm pretty sure your hydraulic pump won't have sufficient volume to run it smoothly, i.e. compound moves. You would need to get a bigger pump or better yet, a PTO pump and separate reservoir so you have sufficient fluid volume for adequate cooling.
The Koyker KB60, which I believe is a 6' back hoe, would be more suited to a 200-series tractor.
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What kind of hoe do you have Len? The Koyker KB 75 is a used unit, but little use, It still looks new, I will not use it much, but want to put in underground power in the spring and the cost of a hoe will be offset by not hireing outside contractor with a backhoe for trenching. Koyker KB 75 7.5 diging depth, I can fabracate a subframe if none are available and it looks like I would need A pto pump to run it, from what Rich has said. I still have a week to make a decision on this unit or keep looking for something else to bad the chinese LW's still have jerkey controls. What other Brand backhoe units would you guys recomend for a 204 with an inexperinced tractor jockey like me. Paolo
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Paolo,
I have an LW-6 Chinese backhoe on a TC254 Luzhong tractor
(imported under the name Terra Cyclone). It’s similar to the Jinma 254. It has its own PTO pump and reservoir.
Although the controls could be smoother, overall I’m happy with the backhoe.
The pump does, however, make a loud grinding noise when any of the hydraulic cylinders reach the end of their stroke. I’m not sure if it’s supposed to do that, or if there is a pressure relief
valve that is not working properly. I’ve use it mainly for planting trees and
removing stumps, so it’s imperative I build a sub frame. The backhoe drags the whole tractor even with
the loader’s teeth firmly embedded in the ground and the outriggers down. I think the sub frame will help as I’ll be
able to put more weight on the outriggers, since the backhoe will no longer be
able to pivot at the TPH.It’s the only backhoe I’ve ever owned, or operated for that
matter, so weigh my opinion with that in mind. I’ve included the backhoe specs from the manual .
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Len,
Do you have a manual that shows whether or not there's a PRV in the PTO pump? A groaning noise from a PRV is normal when you reach end of stroke, but if there's no PRV in the pump then a groaning noise from it is probably a bad thing. There should be a PRV in the hoe's control valve, I think, that should be opening under stall pressures like that. It may just need to be adjusted a bit, if you have a gauge.
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I am debating the LW-6 It is new 2011 and has a Hyd thumb, for the same money as the used Koyker. In crate $2795.00 with free shiping from ATV express Memphis TN but no PTO pump or sub frame. so if the the LW6 will be more suited for my tractor, I can deal with the funky controls and work them out. Good advice from all of you. Thanks Paolo
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I will say that I think that $2750 for a used back hoe with no pump or sump is a good bit high, and I'd be worried that the thing is an “orphan” as far as I can tell from Koyker's website. They don't seem to make hoes any longer and I wonder how long they'll continue to stock parts – if they do. Admittedly, I'm kinda out of touch with current prices and supply, so I could be very wrong.
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What I don't understand is what company or companies manufacture Chinese backhoes? There is no company name plate on my backhoe. The manual simply state “Made in China” without any reference to the manufacturer. Resellers of the LW-6 don't list the manufacturer either. Does anyone know if parts for the LW-6 are interchangable regardless of the manufacturer? If not, how would you get parts if you don't know the manufacturer, other than purchasing them from the original reseller?
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I imported my HW04X subframe mounted 7 foot hoe directly from Jinma myself. It included the pump and tank. I'm certain they buy the hoe from someone else because the quality was nowhere near that of the tractors. Jinma was pretty good to me about replacing the problem parts right away.
If you buy one of these Chinese hoes, be sure the dealer stocks spare parts, especially if you have startup problems like I did.
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I just bought an LW-7A backhoe for my Jinma 354 and am in the process of putting it together now. The dealers who I have talked to tell me that the Jinma hydraulic pump is sufficient to run the backhoe. I intend to ignore the tank that comes attached to the unit and run new hoses to tees installed in the hydraulic lines. I want to run tees so that I can lower the bucket on the attached Koyker FEL to give me a solid front mount.
PTO driven pumps are about $400 plus shipping on eBay, I won't use the backhoe much, but if I really need one I'll buy one.
The poorly written manuals don't tell you how to run the hydraulic hoses through the boom arm(s) and since I have a hydraulic “thumb” I've got an extra 2 hoses to run.
Any information that anyone can give me on the Jinma pump output (GPM@pressure) or running the hoses would be welcome. In fact I'd like to correspond with anyone who runs a similar backhoe.
Roy
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I have the GPM on the pumps at the shop, however it’s around 8.5 GPM on the E314 pump which is what your tractor has and plenty to run the backhoe.I also have a upgraded hydraulic pump CBN E-320 that will increase the GPM alot more if you needed it ,if it came with the tank already, we have the factory Backhoe pump that mounts above the PTO shaft on your tractor yo could use that too
Or if you have a Koyker loader, you can get the power beyond sleeve and hook up the backhoe thru that loader valve.
Tommy
Affordable Tractor Sales
“Your Jinma Parts Superstore”
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” I intend to ignore the tank that comes attached to the unit and run new hoses to tees installed in the hydraulic lines. I want to run tees so that I can lower the bucket on the attached Koyker FEL to give me a solid front mount.”
You can't just 'tee' into the lines, these are open center systems. Do yourself a favor and get a PTO pump. Many folks (including me) use the Prince PTO-7A pump for this application.
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Roy wrote:
PTO driven pumps are about $400 plus shipping on eBay, I won't use the backhoe much, but if I really need one I'll buy one.
Even if you only use it occasionally, you will want it to perform well when you do.
Suggest you brush up on hydraulics. To paraphrase Biggerten: You can't tee into an open center system and expect it to work. You must either use the tractor's integrated hydraulic system or use an independent PTO system utilizing the BH's reservoir.
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