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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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2-155 cummins conversion

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m kuhns

01-19-2008 17:48:26




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I'm looking at an 8.3 to put into a 2-155. What for SAE flywheel housing do I need? Also what would be the measurements of it across the opening?

Thanks




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J Schwiebert

01-21-2008 06:26:24




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 Re: 2-155 cummins conversion in reply to m kuhns, 01-19-2008 17:48:26  
When I worked for Dana yet doing the diesel class we have some people from the West Virginia National Guard who wanted to know more about machining those engines. Hercules sent me a package to give to them. It gave the differences in the miltary engines compared to the civilian engines. Also the military engines are ballanced better. We had a customer that purchased a used 2150. It had a hydraulic head off an IH DT engine on. Power was not a problem but cracked manifolds were, and I mean in short order. A manifold off of a gen set with the intercooler would also be a good item to have.

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LeroyB

01-20-2008 03:25:41




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 Re: 2-155 cummins conversion in reply to m kuhns, 01-19-2008 17:48:26  
I know that Cummins is popular as we have one, but I believe I'd stay with the herc. as well.



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BM

01-19-2008 18:07:39




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 Re: 2-155 cummins conversion in reply to m kuhns, 01-19-2008 17:48:26  
While I'm not trying to talk you out of a cummins conversion, (I've done plenty myself on the smaller tractors) but a 478 with the right parts will make a 8.3 work awful hard to keep up. Military 22.5:1 piston and sleeve set, 3LM466 charger, and a trip to the fuel injection shop along with the cost of normal major machine work and you can have a very impressive 478 that will use less fuel and start better than a 8.3 and yes, 8.3's start very well. All for about half the price of a 8.3 and what it takes to get it put in properly. Just my 2 cents.

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m kuhns

01-20-2008 05:23:27




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 Re: 2-155 cummins conversion in reply to BM, 01-19-2008 18:07:39  
YA, I just rebuilt the one in our 2150 mfwd with the military pistons and it already had some fuel to it. It's somewhere around 180-190hp and seems not to use much fuel. It starts at 25-30 degrees with little preheating. The 2-155 mfwd we use on the 5,000 gallon manure tanker weighing around 80K. Last summer I believe it spun a rod bearing. I didn't get time to check yet. I had a wastegatged turbo off a 8.3 cummins I was gonna put on it to run about 200Hp with some more fuel. The next issue is single disc clutch which we tore the center out of on the 2255 and slipped on occasion. Someone else said the 478 wouldn't live very long with the extra Hp. If we put in the 8.3 longevity shouldn't be an issue and we could run the same clutch as in the 2255/2-180. Any comments/opinions welcomed.

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BM

01-20-2008 07:17:10




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 Re: 2-155 cummins conversion in reply to m kuhns, 01-20-2008 05:23:27  
The single disk clutch is a issue with what you are doing, no matter what engine you are using. the 478 is honestly a beefier engine than the 8.3, but putting a double disk clutch on the 478 would require come custom made parts, while it would be a off the shelf bolt together deal with the 8.3. honestly, you would fall over if you priced all new parts to get the 8.3 bolted to your 3 speed with the double disk. something like 8 grand. seriously. you need the SAE2 clutch and flywheel housings, 160/185 flywheel, longer input for the 3 speed, clutch assembly, shorter throwout hub, longer pilot tube, starter, and front pto shaft. I think we have all the parts used with the exception of the starter. and you need to know if your 3 speed is the HD unit or not. When you get done the 3 speed will be your weak link. by the way, if your 2150 still has the original 90E pump on it you wouldn't belive the difference it would make by upgrading to the newer model 100. the 90E's weren't much better than a old 77 or 88 pump.

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m kuhns

01-20-2008 10:31:42




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 Re: 2-155 cummins conversion in reply to BM, 01-20-2008 07:17:10  
If we stayed with the herc, what all would need top be done specifically to make a double disc work? There is only 1/2 inch of room between the Pressure plate and the clutch release shaft.



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BM

01-20-2008 14:34:22




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 Re: 2-155 cummins conversion in reply to m kuhns, 01-20-2008 10:31:42  
Well the herc uses the SAE3 housings and the double disks were put in the SAE2 housings. they had about a inch more room. SEA2 herc housings exist, i think i have one. I'll have to look into it to see if there's any chance of making something work reasonably.



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m kuhns

01-20-2008 10:28:46




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 Re: 2-155 cummins conversion in reply to BM, 01-20-2008 07:17:10  
The 2150 has the newer pump. I had to replace the friction disc on the flywheight shaft due to it slipping and erratic governor. I used parts from a donar 466 pump.



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kkiowa

01-20-2008 07:25:23




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 Re: 2-155 cummins conversion in reply to BM, 01-20-2008 07:17:10  
What are these military pistons you're talking about? The last 478 I rebuilt I just used the stock sleeves and pistons that came in the kit.



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BM

01-20-2008 07:52:01




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 Re: 2-155 cummins conversion in reply to kkiowa, 01-20-2008 07:25:23  
they were used only in the military engines. 22.5:1 compression instead of 18.5:1. they were 4 ring pistons instead of 3, and the 2 top rings were both keystone with armor groove instead of just the top one. and they were used with hard nitrited sleeves that will pretty much never wear out in a farm tractor. When used with a good model 100 or roosamaster pump they will make your engine use less fuel and start way better than the factory pistons.

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davpal

01-20-2008 14:57:26




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 Re: 2-155 cummins conversion in reply to BM, 01-20-2008 07:52:01  
If a guy were to buy a used Herc out of one of those military 6x6 trucks would it be all set up with the high compression pistons and nitrided sleeves already? I have seen those engines for sale on Ebay a few times brand new in the crate for very reasonable prices. Seems like they are also on generators.



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Buckeye Oliver collector

01-20-2008 21:30:12




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 Re: 2-155 cummins conversion in reply to davpal, 01-20-2008 14:57:26  
Yes thats what one of my Uncle's brother-in-laws did. They bought a 2-155 with a bad motor and had one of the old truck motors put in. 2-155 silver stripe with FWA that is. What a beast!



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BM

01-20-2008 15:12:16




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 Re: 2-155 cummins conversion in reply to davpal, 01-20-2008 14:57:26  
Possibly, there were several different versions. and the military engines had different manifolds and fuel systems along with several other differences, but it's been done.



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m kuhns

01-20-2008 17:30:37




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 Re: 2-155 cummins conversion in reply to BM, 01-20-2008 15:12:16  
Hey BM, could you shoot me an email with your email and/or phone number if you be willing to talk things over with me.

Thanks



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davpal

01-20-2008 16:20:25




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 Re: 2-155 cummins conversion in reply to BM, 01-20-2008 15:12:16  
Does this look like the tractor type of Herc Motor? It is Ebay number: 270084969043 and is in the Ebay store at a place in Minnesota. Guy goes by Arts Parts. M-35 Duece multifuel diesel engine. $1400 dollars buy it now or best offer. These are the ones that come up on here from time to time.



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Oliver Puller

01-21-2008 14:52:58




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 Re: 2-155 cummins conversion in reply to davpal, 01-20-2008 16:20:25  
The motor on ebay is one of the army truck engines. I have four of these that I bought on ebay and there is usually something wrong with them. I have one that had a rod bearing that is so bad that the bearing insert is almost gone. I bought all four of mine for $300.00. Unless they are rebuilt, I would not pay a whole lot for these take out motors.

I have an uncle that worked in the motor pole in the army. If these engines had any problem at all, they would drain all the oil out and run them till they seized or started to hammer and then they would pour the oil back in. Then they could get a new engine put in.

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Oliver Puller

01-21-2008 14:35:26




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 Re: 2-155 cummins conversion in reply to davpal, 01-20-2008 16:20:25  
There are some differences in the 478 used in the Army trucks and the ones used in the tractors. The blocks are the same casting but the tractor engines have a few more holes drilled and tapped in them for the water pump. The heads are also the same casting but the two are machined a little different between the valves. The truck engines have a multifuel injection pump so the pump and plate behind the timing cover and the timing cover is different. Also the timing gears are different on the truck engines and the tractor with the roosamaster pump. Some of the army truck crankshafts are also different. they have two more counterweights on the crank and they are much larger. The rods in the truck engines are also lighter. The intake, exhaust and water manifolds are also different. The oil pump and oil pan is also different because the large sump on some of the army trucks is in the front instead of the rear. I believe the 2 1/2 ton trucks have the sump in the front and the 5 ton trucks have it in the rear. The tractors have it in the rear. The army truck engine can be made to work in the tractors. It just takes a little work. These army truck engines can be Hercules, White or even Continental. They are all the same casting. The truck engines are usually an LD-465 or an LDT-465 or an LDS-465. The 465 is not the cubic inches they are still 478 cu. in. just like the tractor engines.

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