I busted a steel line on my LA534 loader. No big deal, right??? Well, I put a new steel line (kubota) on. All functions of the loader (and all other hydraulics work properly) EXCEPT, it wont curl up. If I put pressure on the bucket and move the control to the up curl, it will allow the bucket to do so, but as soon as the weight is off... nothing.
Loader problems
- Thread starter chief44
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85Hokie
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BX-25D ,PTB. Under Armor, '90&'92-B7100HST's, '06 BX1850 FEL
When you busted that line and replaced, I would image air got into the system - have you run through ALL the motions of the FEL - it make take a bit to push the air out of the line. Is the curl function the line that broke or another line?
I believe it was the curl line. It was the line that hooks to the bottom of the cylinder the operates the bucket. I have worked it through many revolutions. I have oil at every fitting. It seems as if the control valve is working fine. I did notice that when I roll the cylinder out (curl down), the last 6 inches or so it just drops.
nbryan
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Equipment
B2650 BH77 LA534 54" ssqa Forks B2782B BB1560 Woods M5-4 MaxxHaul 50039
If you haven't tried already, maybe try swapping the loader hose pairs at the quick-connects. So you're now using the boom circuit to operate the bucket cylinder, and bucket hydraulics to run the loader boom cylinders.
That way the problem will show to be a cylinder, not the hydraulic power circuit from the tractor being clogged or damaged.
Next I'd disconnect the bucket cylinders top and bottom lines so the cylinder can be manually pushed/pulled through its complete operating length without obstruction or noticeable defect, which will also force out all the existing fluid in the cylinder, that I'd drain into a clean pail to inspect for contamination.
It sounds like something got in the hydraulic fluid and is causing havoc somewhere in the system, that could be at the cylinder or anywhere in the lines all the way to the control valves.
Once drained, inspected, purged of old fluid, reassemble and start tractor then cycle the steering all the way both ways to purge main system hydraulics, and if all's ok then a full cycle of the bucket curl circuit in both directions will refill the cylinders and purge any air.
Hopefully it's all good!
That way the problem will show to be a cylinder, not the hydraulic power circuit from the tractor being clogged or damaged.
Next I'd disconnect the bucket cylinders top and bottom lines so the cylinder can be manually pushed/pulled through its complete operating length without obstruction or noticeable defect, which will also force out all the existing fluid in the cylinder, that I'd drain into a clean pail to inspect for contamination.
It sounds like something got in the hydraulic fluid and is causing havoc somewhere in the system, that could be at the cylinder or anywhere in the lines all the way to the control valves.
Once drained, inspected, purged of old fluid, reassemble and start tractor then cycle the steering all the way both ways to purge main system hydraulics, and if all's ok then a full cycle of the bucket curl circuit in both directions will refill the cylinders and purge any air.
Hopefully it's all good!
I thought about doing that, but haven't tried yet. I literally just changed the filters and the fluid about an hour before I the line blew out. Everything was working perfectly up to that point. I will try that next.
TheOldHokie
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L3901/LA525, B7200DT/B1630, G2160/RCK60, G2460/RCK60
You probably have a loader valve with regen (fast dump) and the bucket lines are reversed.
Dan
I would agree, as a possibility; however, I only had the two cylinder lines off, and put them back exactly the same. Appreciate the reply.
TheOldHokie
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Equipment
L3901/LA525, B7200DT/B1630, G2160/RCK60, G2460/RCK60