eBay/Craigslist Back hoe question

   / Back hoe question #11  
I thought about putting a filter on the return, what micron size is best?
10

I see a lot of tractors with coupling that aren't tied together when not in use, what's the difference?
Those are probably closed center systems that allow multiple valves to be used in parallel.





12345
 
   / Back hoe question #12  
I bought a Chinese backhoe (Jimna LW7) off ebay this summer. I put it on my Kubota L5450 and run it off the one of the tnt valves. Everything they warn you about them is true. They're loose right from the get go, the valves are difficult to feather, etc. But when you compare the price to a Kubota or equivalent it makes the shortcomings easier to live with. Especially if you plan to only use it a dozen hours a year or so like I do. If I was going to make money with it, I'd pay for the good one. As a shovel replacement for a guy getting too old (or lazy) to dig with a real one, It's perfect.
 
   / Back hoe question
  • Thread Starter
#13  
Driley,,,,,,,my exact reasoning, the only thing i am concerned with is doing damage to the tractor, the amour I will use it is maybe 1-2 days per year
 
   / Back hoe question #14  
ORFS are inch only, never metric.

ORFS standards: SAE J1453 and ISO 8434-3
ORFS (O-Ring Face Seal) fittings have a straight thread and a flat face with an O-ring groove machined in the flat face.

I would strongly recommend to avoid mixing up the Chinese Metric thread flat seat/seal Hydraulic Hose Fittings with ORFS. Primarily, ORFS are never metric threads. Secondary, the Chinese fittings do lack the inner groove wall, thereby risking the o-ring to get sucked into the hose and contaminating the hydraulic system.

Just call them what they are instead (and what the Chinese call them): Chinese Metric thread flat seat Hydraulic Hose Fittings

More on this topic in these referenced threads:

Ref:
 
   / Back hoe question #15  
I agree with adding a return filter, if you chose to run from the tractors hydraulics. I think it actually is a simple insurance for the tractors own hydraulics. I also strongly recommend to add a tank return filter, if your backhoe is using a separate pump and tank.

One weak spot with the Chinese backhoe is the abscense of grease zerks at the joint bearing for the twin boom swing hydraulic cylinders. Grease them up well, before taking the backhoe in operation, and during your maintenance services.

Also, pay some attention to the mounting of the backhoe to the tractor.

You may also check in advance with your friendly distributor their stock of spare hydraulic hoses if they should break. A hose will break sooner or later on your backhoe...
 
   / Back hoe question #16  
Driley,,,,,,,my exact reasoning, the only thing i am concerned with is doing damage to the tractor, the amour I will use it is maybe 1-2 days per year

I understand your concern. There's a lot of messages on this board about people breaking their tractors with 3pt backhoes. I will say that it does seem kind of hard on the three point when I'm digging. Not so much the actual stress but the fact that the linkage slack allows the hoe to move around and can cause jerking type stresses. I'm seriously thinking about building my own frame mount to use if I'm doing something more than a small simple job.
 
   / Back hoe question #18  
Most Chinese 7' backhoes are quite heavy, and usually set up for 3 point mounting. I think this will be way too much hoe for a 1600lb tractor. I think there is a good chance you will snap your tractor in two. I didn't like to put the 7' how on less htan 35HP chinese tractors and they are usually 3500lbs or so base weight, and heavy castings. There are some smaller korean, italian, and even chinese hoes that would be better, or a kelly made in usa. of course you won't get them for 2000! If you proceed with this be very careful and you may want to see what it might do to your kubota warranty.
 
   / Back hoe question
  • Thread Starter
#19  
The hoe weighs 700 lbs, it is not as heavy as the other 3 pt hoes I have seen,,my bush hog weighs 600lbs and is cantilevered 6' out,,,

Tractor,,I already set up a return filter thanks, i set it up with qiuk connects so I can put it in when I need to use the hoe and take it out for other things

This hoe has grease zeros on all the bearings,, the king pin was modified and replace with a greasable one, Mr Rooks,,I had seen that page from surplus supply, thank you

I have access to a tank and PTO pump, that I may buy for $100 just to isolate it,,,not sure

I still haven't gone thru with the purchase,still weighing the ends against the means , so to say

My tractor has frame mounts in the back and I was thinking about fabricating a backer mount to make it a little tighter, also there are some " more heftier " top links out there that companies like liberty backhoes use


Thank you for all the input
 
   / Back hoe question #20  
Mr Rooks,,I had seen that page from surplus supply, thank you

My references were for the pleasure of Traktorz, who was adamant about there being no such thing as metric ORFS fittings. Good luck on your project.
 

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