toplink bracket problems

[bert2755]

Can anyone tell me what the proper torque spec would be for the top link bracket on a JD2755? Really bad day yesterday, broke 2 TL brackets!

Are the aftermarket TL Brackets any stronger then the JD ones?

Thanks in advance, very interesting forum, I think I will spend lots of time reading here.

 

[RoyJackson]

How on earth did you break toplink brackets?

Anyway, if you know the thread of the bolt (or take one to a hardware store for comparison), go on line and look up torque values. Torque values are normally based upon the thread size (1/2-13, for example) unless specifically called out for a particular application.

 

[beenthere]

:welcome:
I'd also like to know more about the broken brackets. Can you post a pic or two?

Need to learn from your experience.
Thanks

Is this the bracket? Seems if it is, there are some mating surfaces that are getting in the way to cause it to break. Or, what implement is being used? Maybe a subsoiler?

 

[bert2755]

using a tree spade 44 " BaumaLight with a 3 point adapter. The first bracket broke I believe when I went over a bump too fast and the tree spade may have drug on the ground, that is my theory anyway. Changed that bracket out with a spare one that I had here (which is a whole other story about non standard JD toplinks). But I reused the bolts that were out of the broken one.

The second one, a bolt broke off and the TL bracket self destructed very shortly thereafter. So we are thinking the bolt may have been stressed during the first incident. At least that is my thoughts right now. But I can't help but wonder if one of the bolts were not tight enough and caused the TL bracket to flex (which cast does not do well).

The bracket shown in the pic is the one I have (had).

 

[beenthere]

Maybe it is the "weak link" in the system to protect something more major.

A tree spade may be beyond the practical limit. But can only surmise from what you have explained. From my limited experience using a tree spade on a truck, there were some serious side, forward, reverse and lifting stresses put on the truck chassis when trying to get the spades shoved into the ground to get a tree.

 

[bert2755]

i had considered that too, but the first 50 or so trees when well. Then I bought a second TLB and drilled it out to fit a standard cat 2 TL pin and installed it. Right after this I started to have problems. The TLB did not break where I drilled it out. The fact that these brackets broke only after I changed them. Therefore it is something I have done.

 

[beenthere]

Interesting.
Can you post a pic of the broken one(s) ?

 

[magicheater]

Interesting.
Can you post a pic of the broken one(s) ?

Yeah! I would like to see that too. I built a custom top-link bracket for my L4350 using the standard mounting pattern of the original, it weighs about 3 times as much, I just check to make sure the bolts are tight regularly, has only come loose once in ten years. Thinking of building one for my B7800 as I want to try to duplicate an experiment I did on the larger "K" and see if it has any merit.

 

[bert2755]

here are some pics. The first 3 are of the bracket that I drilled out to 1". Ignor the welding, I was just playing to see what happens when you try to weld cast.

The forth pic is from my original bracket that I also broke after the new one broke. Not to sure where the rest of the parts are for that one right now (may be in the bush somewhere). As I recall there may have been a touch of rage going on after the 2nd one broke.

Neither of the brackets broke where the pins go. The first one just blew out. The second one looks like a bolt broke and the bracket busted up after that. I had reused the bolts from the first one and suspect that they may have been weekended or had hairline cracks.

Any idea's whats going on here?

 

[beenthere]

My idea is you are using an attachment that needs a category II tractor ahead of it.