Old L4200/LA680 float operation?

[Jay4200]

My old and beat LA680 FEL float function has never worked correctly since I owned it, at least as far as I can tell. The control lever is pretty sloppy, so it is probably caused by wear in a linkage or something - the valve assy is mounted up front on the loader with a long control lever, but the valve is fairly well packed in behind a steel plate, so I can't see much. The lever does hit the back of the slot in the cover - don't know if it is supposed to - and I sometimes have to give it a yank to get the bucket moving up, making me think sloppy linkage. At any rate, float occurs intermittently at best, usually when I expect/need down pressure, and/or vice versa. Any suggestions on what to look at to improve functionality and/or how to get at it?

How is the float function supposed to work anyway? If I click the control into float, it doesn't stay there unless I hold the lever up. Is it supposed to stay in float when I let go, until I push the lever back? The bucket does seem to get into a float-mode sometimes where I don't have to hold the handle, but I don't know how to get it there (or it might not be in float, just appears to be floating).

JayC

 

[art]

IT sounds like you do have loose linkage but it is supposed to stay engaged when the lever is in the full forward.


We sometimes find that there is rust and just crap in the bottom of the valve that would keep the valve detents to work.

Not looking at your valve to know exactly how it was built but the bottom cover of the spool can be removed and cleaned quite easily. I would have caution while removing the cover in case the balls have come out of position and might be loose.

 

[Thomas]

First try cleaning spray..move joy stick while spraying.

There times my will pop out of float mode while back draging,I believe do to speed w/good bounce.