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J&I pickup flatbed with hyd bale spears

Tx Jim

Tx Jim

Well-known Member
Location
Coyote Flats, Texas
The bale spears on my J&I flatbed that I've owned for over 10 yrs have decided to move from straight up to straight out overnight. I realize that one or both hyd cylinder piston packings could have failed. But due the cylinders being under the bed and not readily accessible I was searching for ideas on how to check the electric over hydraulic control valves(solenoids) too be sure one of those isn't at fault. The spears still raise bales just fine. I've moved many 100's of bales since I've owned plus utilized as a jack for equipment with flat tires & pull tee posts.

Thanks for any ideas, Jim
 
How difficult are the hoses on the valve end to access. My
recommendation would be place a valve in the up or lift
circuit. Raise it, shut the valve and then see if they leak
down. Or another option is to park a tractor next to it with
known good SCVs and use some spare remote cylinder
hoses to hook that to up to the cylinders and test the
cylinders that way.
 
You can pull the spools out and hook them tu power see if
they are moving full stroke or sticking somewhere
 
I don't know of any way to find out other than to block the spears up, disconnect the lines that raise them, plug the cylinders and watch them, see if one goes down.

I suspect it will turn out to be a failing piston seal.
 
(quoted from post at 08:58:41 09/06/21) The bale spears on my J&I flatbed that I've owned for over 10 yrs have decided to move from straight up to straight out overnight. I realize that one or both hyd cylinder piston packings could have failed. But due the cylinders being under the bed and not readily accessible I was searching for ideas on how to check the electric over hydraulic control valves(solenoids) too be sure one of those isn't at fault. The spears still raise bales just fine. I've moved many 100's of bales since I've owned plus utilized as a jack for equipment with flat tires & pull tee posts.

Thanks for any ideas, Jim
Click to expand...

IMHE, the odds are GREATLY in favor of failed cylinder seal(s).

I suppose it has an electric pump, as you are familiar with if the valve is held in the "lift" position for a couple of minutes there would be some heating in the area if oil is bypassing the cylinder seal(s), probably NOT as doable with an electric-powered pump vs. an engine driven pump, though.
 
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