From what info I have these old units run about 17:1 compression.
I get most of my bearing interchange numbers from one of these manuals. From there you can get into other brand names such as SKF , Timken, etc.
The bargains can then be found on ebay once you have the manufacturer's numbers.
 

The engine shop took .005" off the deck to arrive at the correct cylinder counter bore. The machinist thought we might have trouble with piston/valve clearance. He thought CAT might have published the numbers. I understand better now why using shims to adjust protrusion is the preferred method. Trouble is, no shims and paying for custom didn't make sense.

The heads were surfaced and the valve seats were reground to spec so we should be right on valve protrusion. I'm close to having the crank and pistons back in the block. I'll report progress. I'm hoping we don't have to shave piston tops.

Thanks for all the help!

If all they took off is 0,005" I doubt there will be a problem.

Hi Team,
since 0.005" was removed from the block deck you will need to re-check and adjust your liner spacer shims to achieve the required liner protrusion as outlined in the 3304/6 engine method/scan below that holds true for all Cat counterbore liner equipped engines or you may have excessive liner protrusion and when the head is torqued down the liner seats can be cracked--if they are not already after all these years-- rendering the cylinder block un-useable without major expensive modification.
Cheers,
Eddie B.

As I understand it the 0.005" was removed from the block to "back into" the correct liner projection without obtaining non available shims.

Holy Moly this gets complicated for an old shade tree mechanic to comprehend!! So if I understand this correctly if one cannot get the proper shims to adjust the height to .002 to .0056 then one has to machine the counterbore a few thousandths to allow the shims to get to the proper height? Are all the shim sizes still available from Cat or aftermarket?

OM, that's correct. The deck was ground to make the protrusion right. I now have a uniform .004-.005" liner protrusion, 1-6.

I hope that's the first time the block's been ground. I know the engine has been rebuilt at least twice. There's a rebuild tag on the block showing the main and rod journals were still standard. When I disassembled, the main and rod journals were .030" under.

"Are all the shim sizes still available from Cat or aftermarket?"

D4 Jim, I did not find any shims, Cat or aftermarket. I found a place in Atlanta that might make custom shims, but the engine shop wouldn't take the job unless they could clean up the counter bore and then set the protrusion by lowering the deck. But my problem was that not only was the protrusion at the minimum, they were very uneven and I'd have .002" difference from one side of the cylinder to the other.

Were you able to find crank bearings to suit? I have two D4600's that I can't get bearings for. Not even sure what material they are made of.

From what I can find in the book there are no shims on the old D4600. Cat simply says they should protrude slightly above the block so there is pressure on both the gaskets when the head is torqued down. Shims are easily cut out of sheets of shim material if you can't get them precut.

Phil, I was able to get after market .030" main and rod bearings from Florin Tractor. Dana also had after market cam bearings. The existing ones were fairly galled up, and since I'm in there...