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New Holland 855 how to retime apron chain?

1

1130Leo

Member
It appears the apron chain is somehow way out of time, How does one reset it?
Not exactly sure where to start.
 
There really isn?t timing other than making sure the chains are straight across from each other and the tubes are in a straight line : these are good old balers but when you start fighting that stupid chain it can get real old real fast especially when there is hay down . I have an 855 manual I can send you pages of if you need . Has any repair been done to the chain recently?
 
If its like the other chain balers I've worked on there is a bracket at the drive pulley that holds the chain tight to the pulley to keep it from jumping links.Something has most likely happened to one of the brackets.Look them over closely, to line the two sides back up on the others take one of the brackets loose and jump the chain over the sprocket teeth to line up both
sides.If you can get slack in the chain it'll make it easier to do,I know how to get slack on some of the others but don't know how to go about it on the 855.Also make sure none of the bars are bent if they are they need to be replaced bent bars are the root of a lot of problems on those chain balers, will cause sprocket and idler damage plus will eventually cause the chains
to break.
 
I have two manuals actually, not much in there that says or tells much, other than how to install a whole new chain... i will pull it in the barn and see if i can figure out a plan. Seems like if i can chain a tube straight across at the top then take off air pressure maybe i can get the chain to drop down and even it up on the drive sprockets.
 
855 that i had did not have separate apron chains, one chain on each side with bars , possibly earlier ones did but i don't know. Sounds like big chain is not on drive sprockets right.
 
Well, I chained the top bar to the top front of the baler, then I let almost all of the air out of the air bags, left maybe 5 lbs of air pressure on them, I was able to move the one side of the chain back 2 notches on the drive sprocket, before refilling the airbags the bar looked almost perfectly straight, after bringing pressure back up to 60lbs, it now appears I need to redo this and move it one more notch, then bring the pressure back up to 60lbs. I did run it for a few seconds, the baler sounds like it used to, and to be honest, I think the chain is aligned like it used to be. Hoping I can get it one more notch, maybe it will run even better. I have to say, trying to setup the timing is not an easy thing to do, nor is it easy to figure out how to do. Thanks for the help guys, and I hope this helps others.
 
Does it have a guide or bracket of some type to keep the chain from jumping links on the sprocket? Seems like it should.Also be sure to check for bent bars even if just bent a little it shortens the width of the chain and pulls against the outside links on the chain,also puts pressure and wear on the idlers and sprockets.
 
Barely had enough room with the air pressure off the chain to push, nudge, force the chain back the two notches, which apparently I should have gone 3, will try to move it
one more tonight, and yes, there are a couple of bars I need to replace. I have 3 or 4 brand new ones I bought on sale a couple years ago, figured I would need them eventually.
Hoping to get another year of two out of this baler, however, I am looking for options, kind of like the New Holland 688, makes a 5'x6' bale. I like the large bales as I do not
have to haul them on the road, more large bales is preferred.
 
Well, finally did get the apron chain timed to where it should be, I can now see that it was never right since when I purchased it from a implement dealer..
Ironic, when running it sounds better than it ever has. lesson learned, it is a huge pain to time the chain, would be nice if there is a easier way to do it,
there really is nothing in the manual of any use to tell anyone how or what to do.

thanks guys!

Leo
 
Glad you got it fixed . They really are a good baler and they wrap the bale so much tighter and better than the older chain balers just make sure your tube mounting bolts are good I had one shear off turned the apron chain into a thousand pound pretzel
 
Thanks, I will keep an eye on that. My first round baler was an old 851, worked ok, but certainly never made a bale like the 855 does.

hope to get a few more years out of it.
 
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