Looking for CAT D2 Engine Spare Parts

Hi All,

I am looking for the following spare parts:

4B4100 Studs 21 pcs
5B9658 Chamber 4 pcs
4B3551 Gasket 3 pcs

I also need a rubber seal that fits between the two engines but could not find part number - picture attached

Can anyone help me or else advise where I could source these?

Thanks

If you have not called Cat, I would start there. In the past (almost 20 years ago) Regal had a lot of parts for the 1950's stuff. In the past we had a nice list of aftermarket parts suppliers.

Not being familiar with the D2 stuff I could be wrong. But Cat was big on using big thick o rings. After being smashed for 50 to 75 years when removed they look like they started as a square seal but are not. Just a common o ring.

You sure you’re working on a D2 and not a D4, only reason I ask is because the picture of the gasket that fits between the two engines is for a D4? That gasket from Caterpillar I think is also around $115.00 now so if it’s not in bad shape reuse it.

Hi Clayton, you can use them on both. There's an instruction where the top edge of the top cover can be rounded so that that gasket can be slipped in without disturbing the pony. I put one on my 5U after rounding the sharp edge. Man, that price is up there isn't it.

Here's the instructions (hopefully...):

Hi Neil yes you are correct, IG1990 sorry for the incorrect info, the price is rather steep I feel.

Thanks everyone for the help.

Anyone got a picture of the workshop manual where it shows values for setting of valves, bolts, injectors, etc....

Thanks once again

And does anyone got a 5J D2 tractor workshop manual for sale or else ready to copy and send to me at a cost of course

You might have luck finding those CAT D2 parts through salvage yards or aftermarket suppliers, but if you’re still stuck, try checking out some Facebook Groups for heavy equipment owners/operators—there are a few CAT-specific groups where members regularly post parts for sale or can help ID hard-to-find items like that rubber seal. Posting the photo there could get you a quicker match, too