In the process of splitting a 88 Dresser 520B to replace the center pins. Machine has lots of slop and most likely will need to be line bored. I remember seeing in a equipment magazine a couple years ago about a product called I believe it was "expander system" or something like that. It said no more line boring and actually fills in the slop in the worn out areas. Has anyone ever heard of this product or used it? Any thoughs?
Stay away from that mess. Get your machine line-bored and put the proper parts in it. That expander will be as big as a joke as the old "dakota cups" that they advertised to weld into sprockets. Think about how that expander would work in a egg shaped hole. Don't waste your money.
Expander co...928 399 9114 or 888 935 3884. They may not work too good like Cat Wrench says, no idea never tried them. I did speak with the salesman and he told me the results are guaranteed. If you talk to them or try them, give us a report.
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I have only seen them used once, it was a good while ago and i dont think they were a great susess! They had problems with the bolts coming lose and what not, think they had to be torqued regular, ok if there was some to do it, not if it was left up to the driver! As i do line boring, im not a big fan of them anyway, on another note i priced one for a job that i could nt fitted my machine in to, turned out i could have welded, bored and fitted a new pin for less than the expander even at a trade price! With a bit of modifaction i got the machine to fit!!
Deere used a similar setup on the old 710 tlb and they didnt stay tight then.
Liebherr used them on hi-reach equipment excavators, they had to be torqued but didnt stay tight, in my opinion if it needs line bored this is no subsitute
looks fine to me, nothing is Guranteed for life! no it probably wont last as long as line boring and re bushing etc....but u gotta look at the cost and downtime Pj
If you examine them closely and you have any understanding of load distribution you would never use them in an "egged shaped" (out of round) hole. Stay away from them. I can't believe anyone could market those things in good conscience, what a joke.
Cat used this idea for a while on the bucket pins on larger loaders. These pins are a two-piece self contained sealed and lubricated cartridge affair which needs the lubricant level checking every 2000hrs. Needless to say this rarely gets done and so they will often wear out as quick as a conventional pin/bush type. The expanding collets are a pain to remove but with no wearing parts on the bucket or loader arms, a new pin assembly brings the machine back to as-new standard in a few hours. As far as reclaiming worn bores with the system goes, my first choice would always be to weld/bore or bore/sleeve.
I can't see the system as anything but a temporary fix on something that has to run until a more opportune time is arranged to do the repair right. It might be OK in a bucket or boom but should not even be considered in the center hitch of an articulated loader. They show the split bushings going into the bore of the bucket but don't show what hold the bushings from going through the other side of the bore.
Thanks for the replys. Pretty much what I needed to know. Was just curious about it. This Dresser only sees about 400hrs a year but I am in no way going to nickel and dime the repair so I'm going to pass on this product and line bore it