D8 parts interchangeability

15A2713 was built in 1957. The D8H is the same D342 engine but depending on hp changes and s/n some parts may not interchange.

Thanks for the information. This is probably going to be my first piece of heavy equipment I buy.

Welcome aboard OldRedTim, the D8G 15A has a fuel-driven torque converter and a clutch. That set-up is the forerunner to the powershift transmission. I think you might need to locate a "Operation and Maintenance Instructions" book. That book along with a Parts Book and Service Manual are sometimes available on ebay. The price of the books is small compared to the cost of mistakes that can be made for lack of information.
Happy Dozin' :cool2:
Craig

Welcome aboard OldRedTim, the D8G 15A has a fuel-driven torque converter and a clutch. That set-up is the forerunner to the powershift transmission. I think you might need to locate a "Operation and Maintenance Instructions" book. That book along with a Parts Book and Service Manual are sometimes available on ebay. The price of the books is small compared to the cost of mistakes that can be made for lack of information.
Happy Dozin' :cool2:
Craig

I have a parts number book and a service manual. I'm on the hunt for a maintenance and operation manual.

I do know after I get the engine straightened out the steering clutches need some adjustment.

My buying this bulldozer depends on what all is wrong with the engine.

I am told naturally aspirated engines have high compression pistons and turbo engines have low compression pistons. You may find pistons are not inter changeable.

I am told naturally aspirated engines have high compression pistons and turbo engines have low compression pistons. You may find pistons are not inter changeable.

Hadn't thought about the pistons being different.


Now for the back story. My boss has this old cable blade D8 that I've always liked. He had a bunch of land clear cut and decided to turn it into pasture land. This dozer has generally been a good runner. He was out pushing up stump piles and it started rolling out smoke and what he thinks is oil from the #3 cylinder. It was driven back to the barn and parked.

After a while it was determined that all the valves were out of spec for lash. The two push rods for the #3 cylinder were found to be bent. He thinks there's a hole in the piston or its cracked. But there is no noticeable blowby.

At my suggestion the #3 injector was changed out. Valve lash adjusted and the engine refired. Still smoking, still spitting oil or fuel out the exaughst. (I now think it's fuel)


Went out this evening and checked out all the injectors by taking the lines loose from all the injectors and dribbling a little fuel in each injector. Bumped the engine over with the decompression lever set to "run" had bubbles form in one of the other injectors.

I guess my next step would be to have all the injectors checked out by a shop to double check and go from there.

I'm going through the engine to see how bad it is before I make a offer on it.