Front loader for a B7200

[Paul Allwood]

Now your 3pt is underpowered. Why did you decide to set the loader relief lower than the tractor?

Dan

Only because the specified relief setting for the loader in the B1630/1640/1640A loader manual is 1450 psi when fitted to the B7200HSTD. Would you suggest leaving it at or a little higher than the tractor relief setting ?

 

[TheOldHokie]

Only because the specified relief setting for the loader in the B1630/1640/1640A loader manual is 1450 psi when fitted to the B7200HSTD. Would you suggest leaving it at or a little higher than the tractor relief setting ?

I would set it higher that the tractor.

Dan

 

[Paul Allwood]

I would set it higher that the tractor.

Dan

Any idea why the relief pressure would be specified at 1450 psi in the B1630 loader manual ? Was there something different about this setup that meant this pressure didn't affect the 3PL pressure ? Just curious.

 

[TheOldHokie]

Any idea why the relief pressure would be specified at 1450 psi in the B1630 loader manual ? Was there something different about this setup that meant this pressure didn't affect the 3PL pressure ? Just curious.

I will have to look at my msnuals.

The lower relief pressure absolutely lowers the 3pt lift capacity. I have no idea why that was done.The only readon I can think of is the loader was deemed too light for heavier loads.

Dsn

 

[Russell King]

Was there a front mounted pump version for power to the FEL on the B7200?

That is one way to get a separate (lower) rated FEL pressure that would not affect the three point hitch.

 

[TheOldHokie]

Was there a front mounted pump version for power to the FEL on the B7200?

That is one way to get a separate (lower) rated FEL pressure that would not affect the three point hitch.

The B7200 outlet block relief specification is 2060 PSI.

The B7200 3pt lift is rated for 400 pounds max at the pins.

The B1630 loader used tractor hydraulics on all b7200 and B7100 models

Per the manual the loader relief cartridge was "not adjustable" and came preset at 1450 PSI. Yet there is a section on adjusting it later in the manual. The "tamper proof" cover is not hard to remove but it will self destruct and the adjusting screw will be left exposed. At one time replacement covers could be purchased from a dealer

Dan

 

[Paul Allwood]

The B7200 outlet block relief specification is 2060 PSI.

The B7200 3pt lift is rated for 400 pounds max at the pins.

The B1630 loader used tractor hydraulics on all b7200 and B7100 models

Per the manual the loader relief cartridge was "not adjustable" and came preset at 1450 PSI. Yet there is a section on adjusting it later in the manual. The "tamper proof" cover is not hard to remove but it will self destruct and the adjusting screw will be left exposed. At one time replacement covers could be purchased from a dealer

Dan

Thanks Dan.

I don't know how to adjust the tractor relief setting yet, but I think I'll leave it alone for now rather than risk leaks past old seals. 1800 psi instead of 2060 psi drops the lift capacity from 400 to 350 pounds. I'll look at the relief setting if this causes a problem.

When you refer to "at the pins", is that at the end of the lower arms, circled in red in the attached pic ?

 

[TheOldHokie]

Thanks Dan.

I don't know how to adjust the tractor relief setting yet, but I think I'll leave it alone for now rather than risk leaks past old seals. 1800 psi instead of 2060 psi drops the lift capacity from 400 to 350 pounds. I'll look at the relief setting if this causes a problem.

When you refer to "at the pins", is that at the end of the lower arms, circled in red in the attached pic ?

Thats at the pins.

Dan

 

[Paul Allwood]

I'm hoping to get a loader bucket made this week. I saw this one with internal ribs while I was searching for ideas. To me, it looks like the ribs could add a fair amount of strength to the base of the bucket without adding much weight.

Since I've never actually used one, I'm really interested in your thoughts. Pros and cons, good or bad ?

 

[Hugo Habicht]

Since I've never actually used one, I'm really interested in your thoughts. Pros and cons, good or bad ?

My thoughts: more surface area for clay / soil to stick to. If you have sandy soil this should not be a problem. Reinforcement on the outside would not have that disadvantage.

And a nice round shape has a lot of inherent strength already and a good solid front edge would be my preference.

 

[Paul Allwood]

My thoughts: more surface area for clay / soil to stick to. If you have sandy soil this should not be a problem. Reinforcement on the outside would not have that disadvantage.

And a nice round shape has a lot of inherent strength already and a good solid front edge would be my preference.

Thanks Hugo. Definitely more clay here than sand.

 

[Paul Allwood]

It doesn't look much like a bucket yet....but it's progress.

 

[Runs With Scissors]

I'm hoping to get a loader bucket made this week. I saw this one with internal ribs while I was searching for ideas. To me, it looks like the ribs could add a fair amount of strength to the base of the bucket without adding much weight.

Since I've never actually used one, I'm really interested in your thoughts. Pros and cons, good or bad ?

At first glance, I am not particularly fond of those "internal ribs”, but I can’t articulate why I don’t like them…..I just don’t for some reason.

It seems like they would “get in the way”, but thats all I can come up with……..

 

[Paul Allwood]

At first glance, I am not particularly fond of those "internal ribs”, but I can’t articulate why I don’t like them…..I just don’t for some reason.

It seems like they would “get in the way”, but thats all I can come up with……..

Don't reckon that would stand up in court.

 

[torch]

Thanks Dan.

I don't know how to adjust the tractor relief setting yet, but I think I'll leave it alone for now rather than risk leaks past old seals. 1800 psi instead of 2060 psi drops the lift capacity from 400 to 350 pounds. I'll look at the relief setting if this causes a problem.

When you refer to "at the pins", is that at the end of the lower arms, circled in red in the attached pic ?

Leave the tractor relief setting as stock. Yes,, some of Kubota's loaders could be had with an optional PTO pump, depending on the tractor they were being fitted to, which may explain the manual's numbers. But as you have discovered, adjusting your FEL relief lower will reduce 3PH capacity because the FEL relief is upstream in the chain.

If you want to protect your front axle, etc. from overloading what you will need is a bypass relief valve installed on the lift cylinder lines. This will limit pressure to the lift cylinders only without affecting the 3ph pressure. Load the bucket (or forks) with the maximum payload and adjust the bypass relief so it will just barely lift that and no more.

 

[Paul Allwood]

Leave the tractor relief setting as stock. Yes,, some of Kubota's loaders could be had with an optional PTO pump, depending on the tractor they were being fitted to, which may explain the manual's numbers. But as you have discovered, adjusting your FEL relief lower will reduce 3PH capacity because the FEL relief is upstream in the chain.

If you want to protect your front axle, etc. from overloading what you will need is a bypass relief valve installed on the lift cylinder lines. This will limit pressure to the lift cylinders only without affecting the 3ph pressure. Load the bucket (or forks) with the maximum payload and adjust the bypass relief s

For this relief valve, would I simply need to tap into the line that goes to the lift side of the lift cylinders, and does the relief go back to the tank return line ?

 

[chim]

Paul, your work is excellent and I enjoy watching your progress.

 

[North Idaho Wolfman]

It doesn't look much like a bucket yet....but it's progress.

Yep looks like a sheet of steel and some sticks of steel!

 

[Paul Allwood]

Paul, your work is excellent and I enjoy watching your progress.

Thanks Chim

 

[Paul Allwood]

Yep looks like a sheet of steel and some sticks of steel!

Haha - it did yesterday. Today the sticks of steel still look like sticks of steel, but the sheet has been cut and has a couple of folds....then I had to leave to see my GP.