Farm Equipment - 170 & 175 gas motor balance

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170 & 175 gas motor balance

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=175296
Printed Date: 05 May 2024 at 2:28am
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Topic: 170 & 175 gas motor balance

Posted By: allisbred
Subject: 170 & 175 gas motor balance
Date Posted: 20 Oct 2020 at 8:38am

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

Replies:

Posted By: DrAllis
Date Posted: 20 Oct 2020 at 9:14am

The gas engines all ran 2000 RPM max high idle. Made no difference if it was a D-17 or 170 or 175, so my answer is no.

Posted By: DanD
Date Posted: 20 Oct 2020 at 9:58am

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.

Posted By: ksbowman
Date Posted: 20 Oct 2020 at 1:44pm

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.

Posted By: DanD
Date Posted: 20 Oct 2020 at 2:57pm

ksbowman wrote:

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!

Posted By: allisbred
Date Posted: 20 Oct 2020 at 3:23pm

Thanks guys, I was just wondering if there were updates through the years. Kevin

Posted By: DrAllis
Date Posted: 20 Oct 2020 at 3:49pm

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..

Posted By: JC-WI
Date Posted: 20 Oct 2020 at 4:53pm

Now, what made the first 180 engine to run so smooth? Then when they started production of the 180 4 cylinder, there was serious vibrations and eventually took them back and put in the 6 cylinder engines.

So did anyone ever look into why that first engine was so smooth? Maybe it has a counter balanced crankshaft? Be interesting to find that first smooth running 180 and drain the poil out of the pan and stick a bore scope up there and see what it really looks like inside it.

-------------
He who says there is no evil has already deceived himself
The truth is the truth, sugar coated or not. Trawler II says, "Remember that."

Posted By: DrAllis
Date Posted: 20 Oct 2020 at 5:37pm

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.

Posted By: m16ty
Date Posted: 24 Oct 2020 at 10:29pm

JC(WI) wrote:

I think it was just luck (or unlucky, the way it turned out). They should have known better, just due to the design, but that test tractor ran smooth and they thought they were ok.

I've played with the governor on these 226 engines, and you can turn some crazy rpms for a 4 cylinder and it will hold together. You will get a lot of vibration though.