Need help identifying a Cat 3406

It's most likely a C. The block number is stamped on the turbo side, you should be able to look thru the cutout in the insulation to find it. It is the blacked out area that you can see on the turbo side picture. It should be a 3ZJ prefix.

 

I agree with SmokinCat. You got yourself a 3406c prefix 3ZJ.

 

If that's the number KW gave you it would prolly be right. The 4ck was a what they call a PEEC engine yours would have originally had an electronic governor on the back of the pump as well as a electronically controlled timing advance and a ECM. It looks as though someone has converted it to full mechanical. It is a good setup now.

 

I think that cone shaped cover on the driver side near the air compressor means it's a C

 

Pretty sure its a 3406b. I thought all 3406c were pec motors peck have elec throttle and the front cover has a couple wires running out of the timing advance cover

 

The most common serial prefixes for the PEEC are 8TC which is a B and and 4CK for the C.

The thing is since someone has done a conversion on the OP's engine it could be a B pump and advance. The best thing that could ever be done to a PEEC is a conversion to manual, then it is a great engine.

There are plenty of full mechanical 3406 C's built by CAT, the serial prefixes are 3ZJ, 5KJ, and 8PN. The 3ZJ can be either a B or C depending on when it was built.

 

A B has 6 point head bolts & a C has 12 point.