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Based on Continental's literature, the LD and LDS were designed at the same time for the 2.5 ton and 5 ton, respectively. Based on what I have read here on SS and other websites, the LD received a turbo as part of an effort to clean up the exhaust and became the LDT. In my opinion, calling it...

I'm pretty sure that he was talking about the LDS465-2, not the more common LDS-465-1.

Where do you get all of these improvements? TM 9-2815-210-34-2-1 agrees in that there is additional (though minimal) piston cooling. However, there is nothing mentioned regarding crankshaft couterweights and it clearly states that the the oil pump volume is the same (unless you are talking...

Did these companies replaced the GMC axles with rockwells?

My question is what is significantly better about the LDS. The piston cooling seems minor and was done with the intent of using poorer oils (think about that, oils considered poor in the sixties!). If you had to pareto the multi's shortcomings, it sure seems that the lower end would come...

According to Continental's literature on the LDS, the oil cooled piston results in a 100F decrease in top ring land temperature and allows the use of "lesser" oils. Only 50% of the oil squirted makes it into the pistion. It's not what I'd call significant.

It has a 100kW head. He's testing it right now with a 40hp irrigation pump. Runs great, clear exhaust. Very smooth.

Some pictures:

Thanks!!!!

I am helping a friend refit a civilian generator with a multifuel engine and need to know the number of teeth on the ring gear for the speed sensor. It is too far assembled to take it apart to count.

Stumps is dead on. If achieving the CAFE standards were as easy as Lucal oil additive, that is what the automakers would do. Instead, they specify a thinner oil with less friction: 5w20.

A reasonable argument can be made that if the military thought that drain back was a great feature, they'd have specified it on other vehicles/ equipment. Is there anything else which has this "feature"? The early gasoline trucks did not nor did their civilian counterpart. Does the Cat in the...

There are bypass valves for both the filters and the cooler. Heated oil from the pan can circulate right around cold oil in the filter OR cooler. Practically speaking, the drain back PROLONGS the time for oil to reach critical areas and is a prime reason cited for adding the spin on adapters...

If I recall correctly, he indicated that it was speculation. It would be interesting to see if any of the SAE papers address this.

Are there any references or justification for the idea that the military WANTED the oil to drain back? In normal designs (this one too) the oil can simply bypass the oil filters. Design flaws do happen.......

No, there were single sprag transfer cases.

I have searched and read the TMs but want to be sure.... The LD and LDT and LDS all have piston squirters. Only the LDS has the channel to cool the top ring. Correct?

I choose the weight to license it at and pay accordingly (more $$ for more weight).

Here in SD, I set the GVWR to whatever I want.... Of course, I cannot exceed axle/ wheel maximum weight, etc.

I've had the best luck using loctite to seal studs into water jackets. Especially if the threads are a bit worn in the block/ head.