170 & 175 gas motor balance

Were these engines balanced for higher rpms than the D17 from Allis?

There is no difference in the moving components that would make any difference in balanc among a D17, 170 or 175.  Next step to make a 4 cylinder smoother is a balanceer like in a 6080 engine and probably in your newer 4 cylinder car engine.  Basically a couple of weights turning opposite direction from each other and turning 2X crankshaft speed. 

ksbowman wrote: DanD wrote: There is no difference in the moving components that would make any difference in balanc among a D17, 170 or 175.  Next step to make a 4 cylinder smoother is a balanceer like in a 6080 engine and probably in your newer 4 cylinder car engine.  Basically a couple of weights turning opposite direction from each other and turning 2X crankshaft speed.     This would be similar to the Lancaster Balancer used in the 170 Perkins diesel.

What I described is not just similar..it is a Lanchester Balancer!

Once the D-17 was new enough to get the full-flow oiling system, the changes weren't very many from 1960 until the last 175 gas in 1975?? or so.   The series 4 D-17 crankshaft was "tuff-trided" which made the journal surfaces harder to resist wear. Most of the series 4 gassers I overhauled for the first time never needed the crankshaft re-ground undersized because of this. The 170 got the compression raised over the D-17 engines and the 175 got a little more compression and a higher lift camshaft. Governor weights and springs for the 170/175 were different than any D-17 engine. That's about it for the G-226 series engine that, as far as gasoline farm tractor powerplants go, was a very durable and reliable engine, especially when compared to some of the competitive models of the same time frame..

It was nothing special. That's what confused them. My take on the problem is this. It wasn't as much of an engine problem as it was a sheet metal problem. That prototype tractor had some handmade parts, like platform, fenders, battery box, etc. The bends and or metal thickness was such that the vibration was minimal and was given a pass to go forward into production. I've written on here before about the black 7000 platform tractor I had to fix as a Company Rep for the same issue.....vibration at your feet or at the steering wheel.  All I did was redo the platform to made it more solid and the customer was more than satisfied. This was after the previous Company Rep had the engine balanced and torque tube bearings all replaced, all to accomplish nothing as far as satisfying the complaint.