I have b7100 with a b219 loader operated with an independent pump. I just recently rebuilt the cylinders. Everything seems to function fine but when i try to pick up a heavy load the lift arms have no pressure to go up. The tilt cylinders will lift the same load just fine but the arms wont. It cant be a pump issue so is my problem in the control valve?
Loader hydraulics question
- Thread starter nave.lb
- Start date
Russell King
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Equipment
L185F, Modern Ag Competitor 4’ shredder, Rhino tiller, rear dirt scoop
Move the tilt cylinder hoses to the lift cylinders and move the lift cylinder hoses to the tilt cylinders. Then see what works and what doesn’t.
sound like you are exceeding lift capacity of the loader.
a 219 has something short of 500 pounds lift capacity. less the bucket weight or fork weight. even less if the load is not at the pins / extended, etc...
How much are you trying to lift? weight of forks/bucket? and how far forward from the pins is the load?
cheers
a 219 has something short of 500 pounds lift capacity. less the bucket weight or fork weight. even less if the load is not at the pins / extended, etc...
How much are you trying to lift? weight of forks/bucket? and how far forward from the pins is the load?
cheers
Im not at capacity. The tilt cylinders will lift the same load with no issue.
By "tilt cylinders" I assume you're referring to the bucket cylinders used for curling and dumping the bucket. The amount of force the bucket will proved by curling the bucket up (like when you're digging or ripping up roots) is referred to as the breakout force.
My LA344 has a breakout force of 1,407 lbs. at the pins.
However the loader lift capacity is only 820 lbs. at the pins.
After subtracting the weight of the SSQA and bucket and accounting for how far out the load is I can only actually lift about 425 - 450 lbs.
I may be able to get a 800 lb. load "off the ground" by curling the bucket but there is no way I can actually pick it up with the loader.
My LA344 has a breakout force of 1,407 lbs. at the pins.
However the loader lift capacity is only 820 lbs. at the pins.
After subtracting the weight of the SSQA and bucket and accounting for how far out the load is I can only actually lift about 425 - 450 lbs.
I may be able to get a 800 lb. load "off the ground" by curling the bucket but there is no way I can actually pick it up with the loader.
thank you
but remember tilt power is often 2X that of lift power. If not at capacity I have nothing else to offer other than testing your circuit pressures.
cheers
You nailed it with your answer. We don't know how much weight the OP is trying to pick up, but his comment ...
"Im not at capacity. The tilt cylinders will lift the same load with no issue."
... shows a lack of understanding of how the loader works.
If the bucket, pallet forks or grapple are on the ground, one thing to realize is that the load initially moves away from the tractor as the load is raised. When tilting or rolling the bucket, pallet forks or grapple back towards the tractor, the load moves towards the tractor. The other thing is the moment that the load is exerting about the pivot point in both situations. The cylinders have to overcome the moment from the load to get the load to move. There's a much larger moment to overcome when raising the loader compared to rolling the implement and load rearward.
Also, when you raise the loader, you're lifting the weight of the loader too, or some part of it. When you roll the bucket or some other implement backwards when the loader is down you're not lifting the weight of the loader in addition to the load on or in the implement. It's all interesting stuff for sure.
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Stop guessing. Put a $15 hydraulic pressure gauge on the lift circuit work port and see what your pressure at the work port is.
Do you have any quick connects on the boom hoses?
Dan
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Why not start out by actually answering @MapleLeafFarmer's very reasonable questions. His comment, logic and certainty that he's not exceeding the lifting capacity raises a big red flag for me.
All he's done is rebuild the cylinders which isn't exactly rocket science.
Im here asking a question so i can get informed answers. Not guessing. I do not have any quick connects on them.
You aee akiong questionz which require guesses as answeres. Get a $15 gauge and test your boom pressure. That is a simple, fast, cheap, and unambiquous measure of performance. Based in that result we can provide a much better answer.
Dan
Correct. It is not rocket science. Its simple. I was simply stating what i have done. . I do not know the exact weight of what I was lifting but I do know that it was under 500 pounds. Probably around 400. I didn't have a scale handy. I came here to ask for help. You'll have to forgive my apparently uninformed response. Thanks.
Thank
Thank you. I do appreciate the response and the information you provided. Im new to hydraulics. I will get a gauge and check the pressure.
Asking is one thing, but you didn't ask, you made an emphatic statement based on an erroneous assumption so that's why I responded the way I did. If the load was 400lb or more since you say it was under 500lb, plus the weight of the bucket or pallet forks, and the likelihood that the load wasn't at the pins, you could well be at the limit of what the loader can lift but not at the limit at which the bucket or forks can curl.
Problem solving requires a systematic approach, part of which is sorting out the knowns and the unknowns. If something is stated as a known but it's actually an unknown it makes it much harder to figure out what the problem is, or even if a problem exists at all. Your loader might be working exactly as designed.
Don't be put off by the old goats on OTT, we can be a little gruff. It's hard to read the "tone of voice" in a response sometimes, unlike talking to someone in person, but we mean well. I'm glade you're here asking questions.
Dan (TheOldhokie) is right, if you take a measurement and the pressure is spot on then you know, maybe there's a problem elsewhere, or not. If the pressure is not correct then we can figure out how to proceed. Dan's question in post #18 is valid, if you need help on what type of gage, how and where to hook it up, please ask.
Dan (TheOldhokie) is right, if you take a measurement and the pressure is spot on then you know, maybe there's a problem elsewhere, or not. If the pressure is not correct then we can figure out how to proceed. Dan's question in post #18 is valid, if you need help on what type of gage, how and where to hook it up, please ask.