Hydraulic Cylinder ends ?

[pokerboy57]

Folks,
Thank you everyone for your very helpful advice. I would have responded sooner but work got in the way. For those of you interested the 300 loader wasn't sold on the 3320. These are the joys of purchasing a used tractor without much experience. The 300 loader is rated at 800 ilbs at the pins so not a lot of lifting capacity after you add an attachment. The diameter of the lift cylinders is 1 and 1/2 incjes and the "bore" I assume it's called is 1 inch in diameter. So I'm going to go down to my local hydraulics shop and sacrifice lift speed and maximum height for "hopefully" and extra 50% lift capacity. That's my goal .... then I can justify a small grapple. BTW: A new CX300 loader is around $6000 dollars. I found a used one in MN for $2800 but that's a little far for me to drive and pick it up. If I do go through with this customization I'll let you all know how it turns out. The good, the bad and the ugly.

Ray

 

[J_J]

You might look here and see if there is anything that will work for you.

Surplus Center

http://www.ehow.com/info_8726509_difference-between-300x-300cx-loader.html

 

[LD1]

Now I am confused. What loader do you have?

You said the 300 loader wasnt sold on the 3320, then you said the 300 loader has 800# lift at the pins

So what exact loader do you have?

A loader rated at 800# is one that would be found on a scut. And certainly not a 3320 deere.

 

[J_J]

Excerpt:

The 300CX loader can be used with John Deere compact tractor models 3320, 3520, 3720, 4005 and 4105. When used with these tractor models, the lift capacity of the 300CX loader ranges from 2,200 lbs. to 2,500 lbs.

Is it a plain 300 loader? Here are the specs used on a different tractor.

http://www.deere.com/wps/dcom/en_US...oading_and_digging/300_loader/300_loader.page

Lift capacity at full height, lb (kg)
---
Measured at pivot (U)
741 lb
336 kg
Measured at 500 mm ahead of pivot (V)
547 lb
248 kg
Measured at 800 mm ahead of pivot (V)
---
Lift capacity at 59 in. (1500 mm), lb (kg)
---
Measured at pivot (W)
961 lb
436 kg
Measured at 500 mm ahead of pivot (X)
741 lb
336 kg
Measured at 800 mm ahead of pivot (X)
---
Boom breakout force, lbf (kgf)
---
Measured at pivot (Y)
1729 lb
784 kg
Measured at 500 mm ahead of pivot (Z)
1230 lb
558 kg
Measured at 800 mm ahead of pivot (Z)
---
Bucket rollback force capacity, lbf (kgf)
---
At maximum height (VV)
1160 lbf
526 kgf
At 59-in. (1500-mm) lift height (XX)
1450 lbf
658 kgf
At ground-level line (ZZ)
1115 lbf
506 kgf
Dimensions
---

 

[LD1]

Wow, I didnt think the plain 300 loader was that bad. And I also didnt think it was offered on the 3320.

Which would have either the 300x or 300cx. When I was refering to 300 loader, was really meaning 300 series as I dont know weather his is the X or CX.

 

[J_J]

What would change the lift capacity on a loader from tractor to tractor since the power to lift comes from the hyd pressure. The pivot point is still the same.

I can see the tipping part, but the right ballast on the rear should take care of that.

Size of bucket might have some effect, very small.

If the front axle and wheel assembly were weak, then I could see the lower safty figure also.

About the only thing I can see is maybe the pressure is different on certain tractors, giving advantage to the higher psi models.

 

[pokerboy57]

I purchased the tractor used....... At the time I wouldn't have known a 300 loader from a Baldwin piano...... It's definitely a 3320 tractor which is a fine machine. And it's definitely a 300 loader. It was 4 years ago when I purchased this unit. It took me some time to figure out that something wasn't right. A new CX300 loader is not cheap. I think starting with carefully measuring the hydraulic pressure is an excellent low cost place to start.

 

[LD1]

Do you have any pictures? How are you positive that it is a 300 loader and not a 300x?

Pressure is a great place to start.

And in an earlier post, when you mentioned that you thought the cylinder bore was 1", how did you come to that conclusion? It is hard to put a finger on the bore size of a cylinder without actually taking it apart. And also just wanting to be sure that you were not measuring the rod itself...

 

[pokerboy57]

I've upladed several photos. One will give you an idea of what the land looks like prior ro clearing it with the tractor. The second shows the model numbr on the loader. The third shows the piiston part of the cylinder that measures 1 inch,.

So how would I go about measuring the hydraulic pressure ?

 

[LD1]

That ain't the piston. That's the rod. And I have no idea for sure what loader it is. But if indeed it is a 300 and not a 300x, it is too small and underpowered for a 3320. But don't know if it can handle larger cylinders that develop more force, from a structural point