Counterweights

[JasonS]

I had occasion to see a number of LDT multifuel crankshafts out of the block. The number of counterweights and overall design varied. Anybody have any details of why or when these changes were made?

 

[WillWagner]

Probably due to the different mfg's of the engines and the engineers involved. The NHC/NTC used the same crankshaftr for years. In the past few years, some of the newer industrial engines that don't use the lower end journal size of the N14 have had two journals less of counter weight. Dunno why, but they work the same and the crank is backwards compatible.

 

[JasonS]

Additionally, some had drilled throws, some didn't. Seems like a lot of variation for a "contract" engine. Perhaps, it does point to some manufacturers being better than others. It'd be nice to be able to identify this from the year/ model tag on the engine.