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Allis Chalmers HD11G reengine

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Ron

09-13-2000 11:54:21




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I have a old HD11G loader with a Buda 516 engine with a broken crank shaft. I would like to find a replacement engine or reengine with a Detroit 4-71 or 6-71 or other engines. Does anyone know about this type of conversion? How would you accomplish this change. The loader is in excellent condition.




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tom

09-17-2000 18:01:12




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 Re: Allis Chalmers HD11G reengine in reply to Ron, 09-13-2000 11:54:21  
Ron , I have both engines that you want. I have a Buda 516 diesel that is complete. I got it from our loal Boces school for diesel mechanics. Supposedly, it was completely gone through by them. I also have a detroit 4-71 (very clean) it's in a large air compressor and runs excellent. It also has the right govenor that you would need for your doser. A truck engine has the wrong govenor. If interested e-mail me. I am in western NY.

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bill

09-13-2000 15:42:42




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 Re: Allis Chalmers HD11G reengine in reply to Ron, 09-13-2000 11:54:21  
Yes the 471 engine will work in the 11G, You do not have enought room on the frame to mount the 671 engine.

The The only thing that you have to get for the 471 is the correct type of rear clutch housing, flywheel and make sure that it it turning the proper direction and make sure that the oil pan is of the deep well type and you have a scanvanger pump on it. Everything else will bolt on the machine. Most power units that you find out there turn the wrong direction and do not have the correct oil pan and the oil scavanger pump.

Any Detroit 471 will work just fine. The 471N will give you more power and smoke a lot less. In terms of horse power it is closer to the Buda Engine.

I just converted a power unit 471N for use in a HD9. Which was superceeded by the HD11 with some very sligh modifications in the final drive area. I have taken HD11 parts and put then in HD9's just fine.

I have a number of HD9's. Check out www.ibdozoing.com.

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Ron

09-14-2000 08:26:06




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 Re: Re: Allis Chalmers HD11G reengine in reply to bill, 09-13-2000 15:42:42  
Bill: I appreciate the info on reengining the HD-11G. I called a local tractor dealer in Columbus Ohio who had 3 HD-9 tractors. The tractors were sold. He suggested that I place an ad in a farmer magazine to locate a old tractor. The Allis Chalmers tractor dealers were very active in the Cleveland and Columbus area and many HD-11,HD-9 tractors were sold. But as time passes, these tractors are disappearing. Hopefully I can locate a Disable HD-9 for a motor assembly. Thank again Ron

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Lee Bradley

09-13-2000 12:42:56




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 Re: Allis Chalmers HD11G reengine in reply to Ron, 09-13-2000 11:54:21  
I know the HD-9 did not have the 4-71N but that is what I would use. Less smoke and more power.

Lee



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Lee Bradley

09-13-2000 12:35:00




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 Re: Allis Chalmers HD11G reengine in reply to Ron, 09-13-2000 11:54:21  
I would go ahead and re-engine with the 4-71N. This is the engine that was the tractor when it was the HD-9. AC changed the designation to HD-11 when they bought Buda and re-engined the line. The HD-5 became HD-6, 9 became 11, 15 became 16 and the 20 became the 21. Some other changes but mostly re-engined. You might what to visit http://www.ibdozing.com/

Good Luck,
Lee of the HD-7W

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Ron

09-14-2000 07:08:37




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 Re: Re: Allis Chalmers HD11G reengine in reply to Lee Bradley, 09-13-2000 12:35:00  
Lee: I was leaning toward using 4-71. I have had good luck with this engine. The Buda engines are hard starters, expensive to repair and unreliable.Since 4-71 engine is shorter then the Buda I was thinking of adding an Allision torque converter, but don't know if this arrangement is workable. In order to reengine I need to find a HD9 to use the mounting brackets and linkages. I wonder if there are parts tractors any around the Ohio area?. Thanks for the comments Ron

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bill

09-14-2000 15:53:57




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 Re: Re: Re: Allis Chalmers HD11G reengine in reply to Ron , 09-14-2000 07:08:37  
Yes you can add the allison TC to that machine. You will have to rework the drive shaft and change the couplings.

If you do that, then the rear housing will not need to be changed to the AC housing-- which is a standard detroit housing. Depending upon what you have for your 471 motors, you might need to get the adjusting rings, to step down lets say from an a-c size housing.

Luckily the AC HD11 design gives you room to work and to do things that would not normally be able to be done in a CAT or IH or almost any other machine that is not of unit construction

Going to HECA, have a good one.

wk

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Ron

09-15-2000 07:57:04




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 Re: Re: Re: Re: Allis Chalmers HD11G reengine in reply to bill, 09-14-2000 15:53:57  
Bill: Its good to know that You can install a torque converter in this unit. I have 4-71 with a allison torque converter install in a plymouth 25 ton locomotive. It is slick, just like driving your car. The torque converter has a air assisted clutch to disconnect the converter from the transmission. This clutch allows you to change gears. The nice thing about a detroit,you can add a air compresser on the rear drive. Just for the sake of interest, I wonder if any HD-11G have been equipped this way? Thanks for the comments. Ron

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bill

09-15-2000 08:24:41




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 Re: Re: Re: Re: Re: Allis Chalmers HD11G reengine in reply to Ron, 09-15-2000 07:57:04  
Yes they had a model that used a torque converter. It was an AC designed affair that was notorious for leaking. If I am right AC was the first ones to really use a TC and that was in the HD7 model. Touted as one of the first units that you could not kill the engine. They used diesel as the TC fluid. So if you ran out of DF you stopped. Think about the problems of priming the system

On that Allison, you will probably have to run a cooler to the front. There should be enought room in the front by the nose to mount that above the hydraulic pump.

You are right, Detroits can run all sorts of nice things driven off of the rear cam housing from air pumps to aux hydraulic pumps or from the front if you have room.

Thanks

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Lee Bradley

09-15-2000 10:26:42




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 Re: Re: Re: Re: Re: Re: Allis Chalmers HD11G reengine in reply to bill, 09-15-2000 08:24:41  
Bill,

I thought the first TC was in the HD-14.

Lee



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bill

09-15-2000 14:36:11




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 Re: Re: Re: Re: Re: Re: Re: Allis Chalmers HD11G reengine in reply to Lee Bradley, 09-15-2000 10:26:42  
I checked and was wrong it was the HD14 was the first one.

Thanks for correction.

wk



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