3 point lift issues

[dougtrr2]

I have wonder about the weight estimate on a log. What species, recently dropped, or dried out, setting on top of the ground or somewhat sucked into the earth. Two logs of the same dimensions can vary greatly in weight.

Doug in SW IA

 

[careyo63]

The FEL on my Ford is a basket type filter to catch dirt and Debris. I had a Hose swell at a bend on the inside of it. Done the exact same thing small Squeal and hoses would show movement. I just Serv. it. New fluid. Cleaned the stainer basket and when I started it back up made it worse!
It didn't really squeal much but the hoses did fibrate. Pulled it back down. lucky I found the problem! Looked inside the hoses and seen it about pinched off. Replaced that section and it's been smooth and operating AIS..
The tractor was NTM and just had it split for a clutch replacement. The shop mentioned they thought something didn't sound right with the FEL.. The man knew his Tractors! Local and been in business for decades. Why I Serv. it.
Decades ago NTM. Yanmar and it does has a 3Pt. Valve on it you can close and lock it. I forgot and didn't open it and it Squealed Super loud. Lift handle raising it. After that I use Jack stands on the 3Pt. implements. The Hyd. 3Pt. lock is the round knob just under the seat.

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[SPYDERLK]

One thing that may have been missed is that I said that I have lifted more than this attempt in the past with the boom pole and had no issues.

Yes. The 3ph is essentially an imperfect four bar linkage. When perfect this lifts a weight without pivoting it. Distance of the weight outward from the lifting force is immaterial except its effect on backtip. Yours still had >850 lb at the boompole lift point.

Something is wrong now. That noise is a check relief valve chatter - pressure with nowhere to go cycling back to sump. Try disconnecting and carefully re connecting all the QCs in your power beyond circuit -those two hoses. Outgoing and return. >> fault on return??

 

[rScotty]

I have wonder about the weight estimate on a log. What species, recently dropped, or dried out, setting on top of the ground or somewhat sucked into the earth. Two logs of the same dimensions can vary greatly in weight.

Doug in SW IA

We cut 40 some full size ponderosa pine in the last couple of years. For those, cured logs weight 2/3 of what fresh green logs weigh. Fully dried wood in rounds or splits is about half of green weight.
Harder woods are heavier, but less of their weight is water.

 

[rScotty]

Yes. The 3ph is essentially an imperfect four bar linkage. When perfect this lifts a weight without pivoting it. Distance of the weight outward from the lifting force is immaterial except its effect on backtip. Yours still had >850 lb at the boompole lift point.

Something is wrong now. That noise is a check valve chatter - pressure with nowhere to go. Try disconnecting and carefully re connecting all the QCs in your power beyond circuit -those two hoses. Outgoing and return. >> fault on return??

Spyderlk, I suggest you change the length of the top link and look at what happens to the lifting force at the end of the boom pole. You will see that the available lifting force The force follows the distance from the lower arm pivot.

I believe the valve noise is the 3pt relief valve, not a check valve. The 3pt system goes into relief simply because it is being asked to lift more than it can.

rScotty

 

[careyo63]

Back to the remedy of a Electric Winch. 5000 Lbs. At HF. 179$ Then only a couple cheap pullies would be needed HF. 8$ stainless steel. If the 3Pt. is rated 1600 Lbs. this is a easy and simple solution. Worst case front end weight added! or load the FEL bucket.

 

[SPYDERLK]

Spyderlk, I suggest you change the length of the top link and look at what happens to the lifting force at the end of the boom pole. You will see that the available lifting force The force follows the distance from the lower arm pivot.

I believe the valve noise is the 3pt relief valve, not a check valve. The 3pt system goes into relief simply because it is being asked to lift more than it can.

rScotty

Hi rScotty
Unfortunately the 3pt is not a perfect //ogram linkage so the difference between simple leverage and the result from its articulated action is not as clear. Its there though.
> Heres an experiential puzzle that will leave you scratching your head 'til you get it. -- Try lifting a fully connected BP from all the way out at the tip. Why is it so hard? The visually apparent leverage just isnt there.
---------------------------------------------------
Youre right. Thanks for the prompt. I meant relief valve, more than likely located in the loader valveblock. Hence the jumping hoses. I will edit to correct the nomenclature.
larry

 

[DarkBlack]

Yes. The 3ph is essentially an imperfect four bar linkage. When perfect this lifts a weight without pivoting it. Distance of the weight outward from the lifting force is immaterial except its effect on backtip.

Scotty is correct. With the lower lift arms near horizontal, if you double the distance of the weight from the lower arm pivot points, you halve the lift capacity.
Triple the distance, your capacity is at 1/3.
Angles below and above horizontal, reduce this effect slightly.

 

[DarkBlack]

To the OP: Make sure your lifting rods are connected to the most rearward holes in the lower links for maximum lifting force , not the more forward holes.

 

[SPYDERLK]

Scotty is correct. With the lower lift arms near horizontal, if you double the distance of the weight from the lower arm pivot points, you halve the lift capacity.
Triple the distance, your capacity is at 1/3.
Angles below and above horizontal, reduce this effect slightly.

Wrong.