Backhoe attachment

[Vigo327]

So I'm not sure what effect that high resistance path will have on the backhoe return. Maybe nothing, or it might slow the backhoe down too much. Worth a try.

Well, the flip side of that is that a pump that can comfortably run an FEL would generally make a backhoe ‘fast’ because if both are sized for the same tractor, the backhoe has less fluid volume in its single larger cylinder for each function, vs the two smaller ones of a loader function.

I recently replumbed a backhoe on my friend’s b6100 to run off the loader pump and got rid of the pto pump (will be repurposed somewhere, someday). There were a few reasons for that but one of the big ones was that i didnt want to have to rev the engine up to get the backhoe to move at reasonable speed. Since i figured the backhoe sectional valve set could take full pressure on its exhaust port, i plumbed from the loader pump, through the backhoe valve, to the loader valve. So far it has had exactly the desired effect. It is adequately fast at ~1500rpms.
I plan to do something similar on my b8200 backhoe which also needs too many revs to move like i want it to.

 

[John1550]

Well, the flip side of that is that a pump that can comfortably run an FEL would generally make a backhoe ‘fast’ because if both are sized for the same tractor, the backhoe has less fluid volume in its single larger cylinder for each function, vs the two smaller ones of a loader function.

I recently replumbed a backhoe on my friend’s b6100 to run off the loader pump and got rid of the pto pump (will be repurposed somewhere, someday). There were a few reasons for that but one of the big ones was that i didnt want to have to rev the engine up to get the backhoe to move at reasonable speed. Since i figured the backhoe sectional valve set could take full pressure on its exhaust port, i plumbed from the loader pump, through the backhoe valve, to the loader valve. So far it has had exactly the desired effect. It is adequately fast at ~1500rpms.
I plan to do something similar on my b8200 backhoe which also needs too many revs to move like i want it to.

So you're saying come FROM the hydraulic block to backhoe and return into the loader valve instead of what was previously mentioned which is the opposite ?
Valve to BH and back to block

 

[John1550]

Sub frame is on. I welded the front bracket to the loader frame. No easy task upside down. I also had to leave those bolts out, the sub frame has to pivot to be put on so no way those bolts can stay in. I'm a bit concerned about that. It's to hold the rops on which isn't a problem it's 2 bolts of many, but not sure if it adds support to the axle housing

 

[rScotty]

Love those turf tires. No comment on the inverted welding.....
Surprised at how far to the rear that subframe puts the backhoe.

 

[John1550]

Love those turf tires. No comment on the inverted welding.....
Surprised at how far to the rear that subframe puts the backhoe.

Need the room for the seat

 

[John1550]

Well here it is peeps. Everything works. Only problem is my head hits the rops so I have to bend forward a bit or hinge the rops forward. And definitely need a bit of ballast in front bucket

 

[Carl_NH]

Looking real good - nice work getting it mounted too. That PTO pump is a good deal and would be nice to have options for connections.

 

[LS Tractor Owner]

Good job on getting it attached! Have you tried digging yet?

 

[John1550]

Good job on getting it attached! Have you tried digging yet?

Not yet

 

[John1550]

How would you guys add weight to the front of the B1550 without utilizing the loader....need that free

 

[Carl_NH]

Put a pipe thru the front loader round cross member and add weights on the left and right ends. You can find barbell sets on CL locally for cheap or maybe free!

But this would limit the loader lift capacity, so the only other option is to add weights to the L-R loader frame on the sides and front - drill or weld bolts on the loader frame.

Be careful though, the front axle and seals etc. may not like all that weight.

 

[Vigo327]

How much do you like your ground clearance? Id bet money the width of the front ‘frame horns’ is the same as my old b7100 which fits 3x 55lb suitcase weights on the front of the frame. Your loader wont clear that hanging off the front of the frame but you might be able to fit some weight right below the front of the frame where the front of your loader subframe is.

 

[loggin]

How would you guys add weight to the front of the B1550 without utilizing the loader....need that free

I would not use the backhoe without the front end loader (FEL). When using the backhoe it is recommended to slightly raise the front wheels off the ground with the FEL to keep the loads off the front wheels, axle, pivots and associated linkages. Most backhoes connect to the frame to the FEL mount so that these loads are transferred through the frame.

Just something to consider.

 

[Vigo327]

I think he just meant he wants to be able to use the FEL without having to put down and pick back up an 'improvised counterweight' in the bucket every time.

 

[John1550]

I'm thinking maybe a cement block hanging off the bar where the suit case weights would go, this I can use the FEL

 

[Vigo327]

I wouldnt mess with less than 100lbs but would aim for the 200-400lb region. If you dont have power steering i would stay closer to 200. My .02

 

[John1550]

So for the most part it worked pretty good. It is too heavy for my tractor tho. Pulls the front wheels right off the ground when going uphill. I had to stop and fill front bucket with stone's.
2 questions
It has side to side play, when releasing the lever it will continue around 10" both ways.
Any way to adjust ?

Also when pushing lever gently forward to push boom out away from me it's fine. If I push lever as far as it goes the boom actually comes back my way ?

 

[rScotty]

Glad you got it working. Larger tractor needed? I ultimately mounted my little backhoe from the 15 hp Yanmar onto an 8000 lb ag tractor and it worked a treat.
That doesn't sound like side to side play...what you are describing sounds more like an air bubble being compressed. Particularly the part about it happening at full motion and then coming back after letting go of the lever.
I don't have a solution other than run it. If it is air it will gradually diminish.... I think.....
rScotty

 

[John1550]

Glad you got it working. Larger tractor needed? I ultimately mounted my little backhoe from the 15 hp Yanmar onto an 8000 lb ag tractor and it worked a treat.
That doesn't sound like side to side play...what you are describing sounds more like an air bubble being compressed. Particularly the part about it happening at full motion and then coming back after letting go of the lever.
I don't have a solution other than run it. If it is air it will gradually diminish.... I think.....
rScotty

The side by side play is in addition to the boom (bubble) issue. Happens when I swing boom left to right, keeps going another 10" or so

 

[Vigo327]

Sounds like it's time to build that front weight!

As for the side to side motion, is your swing chain tensioned up to take all the slack out?

I dont know if this thing has one (i probably should know as i have an almost identical backhoe on my b8200) but sometimes swing cylinders have a 'crossover relief valve' that lets fluid pass from one side to the other to prevent sudden jarring stops and/or to let the boom swing away if you were to snag it something while moving. If you have a crossover relief like that it may be stuck open/leaking.

As far as the boom pushing away and then back toward you.. are you able to push it down on the ground at all? I can pick the back of my tractor up with the boom if i push the bucket against the ground.