Is this a Caterpillar prototype?

Hi, Gwhdiesel75.
That is a Cat Sixty Five crawler but I have no idea what that engine might be. I'd just about bet that it has had a heart transplant at some stage in its life. When I first looked at the right side of the engine, I thought 'Jimmy' diesel, but I have never seen a 'Jimmy' Diesel with all the clutter of air cleaners that is on that engine on the left side. Still, I have been known to be wrong and I don't claim encyclopaedic knowledge of the breed.

BTW, was that another Sixty Five standing alongside this one in one of your photos?

With that screamer on there it ought to be the fastest cat around. Don't forget your ear plugs😄

With that screamer on there it ought to be the fastest cat around. Don't forget your ear plugs😄

I think surely a 71 jimmy but sure looked odd at first.I think we are just not used to seeing one mounted that high which makes the air box covers seem odd, and then the 3 pac low profile air cleaners seem odd too but the wide exhaust runners,water pump location,and cast in gussets above the pan rail are very characteristic of the jimmy and are not present on the 6-110 series.I looked at pics of the Harnischfeger 2 stroke uniflow diesel and no way is it close to what we see.

I think that it is a 6-71 Detroit even though the 3 air cleaners are odd the blower on the engine is right under the triple filter housing. The 6 plates on the exaust side are a dead give away to me. Just my 2 cents. Jason

She's a Sixty Five, and that's a Detroit 6-71, no doubt about it. The aircleaners are a little unusual .. I'm thinking a marine 6-71 aircleaner setup?? ..

Man, thats some oddball repower. Looks like they parked the Sixty Five besides a Tournapull one dark night, and they mated .. 😄

She's a Sixty Five, and that's a Detroit 6-71, no doubt about it. The aircleaners are a little unusual .. I'm thinking a marine 6-71 aircleaner setup?? ..

Man, thats some oddball repower. Looks like they parked the Sixty Five besides a Tournapull one dark night, and they mated .. 😄

[quote="OzDozer"]She's a Sixty Five, and that's a Detroit 6-71, no doubt about it. The aircleaners are a little unusual .. I'm thinking a marine 6-71 aircleaner setup?? ..

Man, thats some oddball repower. Looks like they parked the Sixty Five besides a Tournapull one dark night, and they mated .. 😄[/quote]

You're right OZ, and it's in situations like this that I can see justification for abortion.Ya know what I mean, if they had just put a pony motor on it and painted the engine yellow--------

I think I'd be fairly certain in saying that the engine is not a GM 6-110.
The 6-110 has a distinctive combined manifold and muffler, that was peculiar to that model.
Take a look at the 6-110 in these pics of the old A-C HD20's on the Van Natta Bros website, and you'll see what I mean ..

http://www.vannattabros.com/dozer15.html