I've been offered some cheap undercarriage parts, it's come off rice harvesting machines, can someone please confirm if Berco CR 2840 links are D4 size, I assume the bushes will be 2-1/8", and I hope I can get away with that on worn drive sprockets, but is the pitch right? I have a couple of legless old Cats here in need of footwear and I'm hoping I can use this gear to get them mobile again.
Thanks
Mike

"Mike wrote:

I've been offered some cheap undercarriage parts, it's come off rice harvesting machines, can someone please confirm if Berco CR 2840 links are D4 size, I assume the bushes will be 2-1/8", and I hope I can get away with that on worn drive sprockets, but is the pitch right? I have a couple of legless old Cats here in need of footwear and I'm hoping I can use this gear to get them mobile again.
Thanks
Mike

I think the correct number is CR 2846
The last number is easily mistaken for a 0

OK Lachlan, thanks for clarifying that, and thanks for helping other fools like me save these old girls!
All the best
Mike

If the number is CR2846 then as you say Lachlan, it comes up on Machinery Trader as a link for D4E with 5/8" track plate bolt hole, that is the same chain my mate Joe up in north Qld sells and fits to all the sugar cane harvesting machines.
All the best
Mike

Hey Mike----wasn't Joe that barefoot mechanical genius you were friends with?? How is he doing?

Same 6.75" pitch, 2-1/8" bushing diameter vs 2", 29 tooth count vs original 27, Tip diameter 31.74" vs original 30.19".

"dpendzic" wrote:

Hey Mike----wasn't Joe that barefoot mechanical genius you were friends with?? How is he doing?

Hello Dan, Joe is going great, he still works 7 days a week either planting sugar cane, contracting with his D8H or working on farmers machines, not bad for a fella in his mid 70's, right now he's flat out planting cane till around November. He was lining up some used chain off a sugar cane harvester for me and some used bottom rollers, but he is 2,000 miles north of me so it's a long trip home, the rollers and chain Lachlan "RiverinaD4" found for me off rice harvesters, is only about 60 miles away, so that's a huge difference.

I've got several old Cats needing chain and rollers including the D4 2T, a RD4 and two 3 cylinder diesels, one is a later RD6, the other is a Gas Forty tranny with a RD6 Power Unit motor, the Forty would have had D4 chain on it originally I believe, and I know D4 chain and bottom rollers will fit on the RD6, my "Good" RD6 had D4 undercarriage on it when I dragged her home. Obviously I'd prefer to run D6 undercarriage on those tractors but chain and rollers are impossible to find in my area, for a reasonable price anyway, for a tractor that might get driven for 5 hours a year.

Old Magnet, thanks for those numbers.
Regards
Mike

Here's a nice picture of Joe from 2013 standing next to the sugar cane planter he designed and built, it runs a Cat 3208 engine that he repaired after it had thrown a rod, there was nothing like that machine in the world when Joe built it, the machine does everything in one pass, plants the cane, plus applies fertilizer, insecticide and fungicide.

Notice Joe is not wearing any boots, it's winter time then, he never does wear boots when working, only on Saturday nights when he goes to church!