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I am looking at an older Cub with a DANCO FEL
if left in the up position, the lift arms do not drop...but the bucket does....a lot
.....any ideas what would allow this?
 

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It’s fairly common on used and sometimes new equipment to have some drifting. But excessive drifting is probably bad cylinder seals. I’m no expert but this has been my experience
 

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I'm not a hydraulics guy, but if it was the cylinder seal, wouldn't it leak. I am more inclined to think it would be the control valve leaking by internally.

TUDOR will likely throw in his 2 cents here soon.
 

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If you was to remove the hoses on the rod ends of the cyls and cap off the fittings on the cyls then raise the loader back up it would let you know if the cyls seals was bad if the bucket was to still drop.
 

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If you was to remove the hoses on the rod ends of the cyls and cap off the fittings on the cyls then raise the loader back up it would let you know if the cyls seals was bad if the bucket was to still drop.
Not sure I am following your method...if I remove the hoses...how would I raise the bucket again?....just push it up by hand?
 

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Not sure I am following your method...if I remove the hoses...how would I raise the bucket again?....just push it up by hand?
Set the bucket on the ground with the end tipped up and a block under it to hold it there. Remove the lower hyd hose or hoses and cap the fittings where the lines were and raise the loader back up so the gravity can pull the bucket back down like it was doing. If it doesn't drop then the cyls are ok, if it drops then the oil is seeping past the seals on the rams.
 

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I'm not a hydraulics guy, but if it was the cylinder seal, wouldn't it leak. I am more inclined to think it would be the control valve leaking by internally.

TUDOR will likely throw in his 2 cents here soon.
leakin one side of the piston to the other. An internal leak but Iv been wrong before lol
 

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leakin one side of the piston to the other. An internal leak but Iv been wrong before lol
Correct. In this situation, a leaking cylinder does not leak to the outside world. The rod end of the cylinder has less volume than the base end, so there is room for any fluid that does get past the seals.

The most likely culprit is the piston seals. Valves rarely wear out.

The seals, usually O-rings, are available at hydraulic shops and auto parts stores.

Safety item!

However, it shouldn't be parked with the bucket up. The bucket should be grounded when parked, unless mechanically supported. The same as you support your car with blocking or axle stands after raising it with a hydraulic jack.

Seals, fittings, and hoses do not necessarily need high pressure to blow. Sometimes it's simply a matter of enough pressure cycles or years of service to cause their time to be up, or an accidental movement of the valve handle when someone's foot is where the bucket will land.
 

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Correct. In this situation, a leaking cylinder does not leak to the outside world. The rod end of the cylinder has less volume than the base end, so there is room for any fluid that does get past the seals.

The most likely culprit is the piston seals. Valves rarely wear out.

The seals, usually O-rings, are available at hydraulic shops and auto parts stores.

Safety item!

However, it shouldn't be parked with the bucket up. The bucket should be grounded when parked, unless mechanically supported. The same as you support your car with blocking or axle stands after raising it with a hydraulic jack.

Seals, fittings, and hoses do not necessarily need high pressure to blow. Sometimes it's simply a matter of enough pressure cycles or years of service to cause their time to be up, or an accidental movement of the valve handle when someone's foot is where the bucket will land.
at my former work place I welded up many of CYL's .. they had to go testing after at pressure of 5000 lbs.. the CYL's had a retracted length of 25 feet.. when fully extended they were 75 feet long.. they were used on 'man lifts'.. the seals in them were not 'O' rings.. but a special shape..

TUDOR is our HYD specialist..
 

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I hate when my bucket sags. Mark I think they have a pill for that ?
 

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Sometimes my FEL bucket will stay up, sometimes not. Haven't picked up on a pattern. I usually put it on the ground, but sometimes leave it up a few inches as a test. No one else on the property, all gated and fenced.

A day or two ago, I noticed the BH bucket was on the ground and the boom tilted back. I usually leave it up in the Home position and it will stay there indefinitely with or without the boom lock in place. I'm guessing I left it just enough off 'Home' to allow gravity to take over and let it sag over several days.
 
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