New Holland 1920 loader painfully slow

[Soundguy]

RickB mentioned this in post #5 above.

Soundguy

 

[JerryG]

Could the cylinders be swapped for smaller cylinders for faster operation but with lower capacity?

Like Rick said, go with a quarter inch smaller cylinder. A quarter inch smaller cylinder will make a noticeable difference in the lift speed.

 

[Westendorf-RR]

Some dealers will order and install a loader with too large of cylinders so that the lift numbers will be better than the OEM. What they don't always tell the buyer is that the larger cylinders will also be slower. Do you know what the diameter of cylinders are on the loader?

This is most likely the issue - it should have been consider upfront before the loader purchase, especially on the older model tractor. Smaller cylinders would help considerably with speed.

I know for some of our loaders in the compact market where the tractor has a small (slow) hyd. system we use a regenerative valve. A regen valve redirects the oil right back into the cylinders instead of having the oil travel all the way to the tank and then to the cylinders.

 

[dogbreath108]

Sorry for the delayed response guys, been out for a week with work. Thanks for the replys.

As far as the regerative circuit, I thought that that would help only with speed of lowering the boom...?

As far as the cylinders go, the lift capacity would suffer (and the speed would increase) if the cylinders were flipped. Lift capacity=max. hyd. pressure x surface area (piston) inside the cylinder. Seems to me that adding a slightly higher gpm pump (about 23% if comparing old tractor to new tractor) was the way to go. Everything else was rated for it. Finding that exact same dimension pump (ports and everything) I thought would be best, if possible... The TC series use a different pipe clamping arrangement on the pump, which stopped me dead in my tracks... You can see it on the new holland website. And I stopped right there.
As far as a seperate pump/tank arrangement goes, the tractor looks too nice to do it in that manner. (Everything he has is more or less factory and perfect shape, cars trucks and a few tractors) Although the aftermarket crank mount pump might be the only straight forward way in doing it... In using the factory setup, I might have to remove the old pump just to get some make and model numbers off it. But my guess is that it would be hard to chase because of it being imported..

Joe

 

[RickB]

Sorry for the delayed response guys, been out for a week with work. Thanks for the replys.

As far as the regerative circuit, I thought that that would help only with speed of lowering the boom...?

As far as the cylinders go, the lift capacity would suffer (and the speed would increase) if the cylinders were flipped. Lift capacity=max. hyd. pressure x surface area (piston) inside the cylinder.

Joe

You are correct, a regenerative circuit will not help. In general, they are a band-aid with side effects.

Doesn't matter what mathmatical formula you come up with, flipping the cylinders has ZERO effect on cycle times or capacity. Works about as well as trying to make a pusher fan by flipping the blade assembly around. It just doesn't.

Matching up a different pump isn't a bad idea if you can find one to work. A couple custom built tubes isn't impossible. I'd be more concerned with the mounting and drive than the porting.

 

[dogbreath108]

Rick,
Your right about the cylinders, I wasn't even thinking... When it was mentioned, my brain immediately jumped to the push vs. pull capacity of a cylinder (much like you would calculate when designing a backhoe), without even thinking about the application at hand. Good thing I don't work for NASA...


I might save em money though, I would use a wick and then pull straws with everyone on site with who's gonna light it . (It would make the "what happened at work" discussions at the dinner table with the wife much more interesting!)