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Vintage Diesel and Oil Engines Fairbanks Morse, Lister, Petter, Witte and other pump injected Diesel oil engines.

Vintage Diesel and Oil Engines

1-71 Detroit Diesel (GM)


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  #21  
Old 06-08-2016, 12:59:50 AM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 1-71 detroit diesel (GM)

The cast iron cleaned up well. Still working on the accessories. Blower,water pump,starter, ect. How many GM1-71`s are left in the world today? I have seen 3 in my lifetime. Delco power generator school in Detroit, Engines Incorporated in Philadelphia in 1967. And the one i have now from Pearl Harbor Naval Base. My guess would be less than 100. I am told that they were used on Liberty ships and they are now at the bottom of the sea.Click image for larger version

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  #22  
Old 06-08-2016, 01:27:15 AM
Vanman Vanman is offline
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Default Re: 1-71 detroit diesel (GM)

I wonder if the USS Jeramiah O'Brian has one? Don't recall seeing one in the engine room, but I believe there were three similar sized steam engine generator sets. Would make sense to have a diesel for power until the boilers were in steam.
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  #23  
Old 06-08-2016, 02:11:03 AM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 1-71 detroit diesel (GM)

The standard power on the liberty ships were 20KW reciprocal dc generators. A 1-71 for start up or standby would not have been on all of them as there were more Liberty ships built than 1-71`s Aloha AL
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  #24  
Old 06-08-2016, 02:54:35 PM
Pauls Welding Minnesota Pauls Welding Minnesota is offline
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Default Re: 1-71 detroit diesel (GM)

Quote:
Originally Posted by the diesel doctor View Post
The cast iron cleaned up well. Still working on the accessories. Blower,water pump,starter, ect. How many GM1-71`s are left in the world today? I have seen 3 in my lifetime. Delco power generator school in Detroit, Engines Incorporated in Philadelphia in 1967. And the one i have now from Pearl Harbor Naval Base. My guess would be less than 100. I am told that they were used on Liberty ships and they are now at the bottom of the sea.Attachment 255754
I have a 2-71 on a Delco generator that is still going strong.
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  #25  
Old 06-08-2016, 09:37:09 PM
cornbinder89 cornbinder89 is offline
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Default Re: 1-71 detroit diesel (GM)

2-71's are a lot more common than the 1 cyl, only a very limited number were made, very early in the -71 series run, then they stopped making them.
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  #26  
Old 06-09-2016, 11:09:07 PM
imotorhead64
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Default Re: 1-71 detroit diesel (GM)

Hi Vanman, Thanks for posting about the 51... I've been around Detroits for over 30 years... I had no idea they existed...

https://en.wikipedia.org/wiki/Detroit_Diesel_Series_51

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  #27  
Old 06-10-2016, 12:17:27 AM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 1-71 detroit diesel (GM)

One of my customers out here had a pair of 4-51 marine engines in his fishing boat. Having no valves tune ups were easy. They had unit injectors but required a special injector height timing pin. The boat sunk but the engines were salvaged. Have to check, not sure what happened to them. Aloha Al
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  #28  
Old 06-10-2016, 01:10:48 AM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 1-71 detroit diesel (GM)

The engine oil filter assembly is a bypass type. Oil from an oil gallery is sent to the filter,it is filtered and then sent back to the sump by way of the lower cover plate on the governor weight housing. The filter elements (4) are made out of a stacked paper material They are 1 3/4 x 6 with a 5/8 hole in the center. the GM p/n is 3290697. These packs may have been used on other engines during its time. Does anyone know about these? Being a bypass filter i can always use a snug fitting sock type element.Click image for larger version

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  #29  
Old 06-10-2016, 06:32:54 PM
Vanman Vanman is offline
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Default Re: 1-71 detroit diesel (GM)

I'm a little leary of the Wiki article. A few things don't make sense, like throttling the blower and choking it to stop it. It may have a "mouse trap" as an emergency stop, but I can't imagine it doesn't just shut down the injectors for a normal stop.

About the oil filter- that sure is an odd one, isn't it! I wonder if the canister can accept an appropriately sized roll of toilet paper??
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  #30  
Old 06-10-2016, 08:03:30 PM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 1-71 detroit diesel (GM)

Some pic`s from my 51 parts book. Aloha AlClick image for larger version

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  #31  
Old 06-10-2016, 08:49:54 PM
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Default Re: 1-71 detroit diesel (GM)

Wow, so is that thing meant to be a throttle or just an emergency shut down?

What a Neat book to have!
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  #32  
Old 06-10-2016, 09:37:55 PM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 1-71 detroit diesel (GM)

I think the engineers were smoking something when the designed that one. There is a vacuum pot on the control rack and a butterfly in the blower inlet. By moving the butterfly varied the vacuum to the pot which moved the rack. Total engine control and shut down were controlled by this. Turbocharged engines today use a fuel modulator to get the proper air to fuel ratio. Al
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  #33  
Old 06-10-2016, 09:57:25 PM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 1-71 detroit diesel (GM)

I almost forgot the emergency shut down was two rags on either side of the air silencer. Click image for larger version

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  #34  
Old 06-10-2016, 11:24:51 PM
Vanman Vanman is offline
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Default Re: 1-71 detroit diesel (GM)

Wow, that is weird alright. Maybe too much airflow through the combustion chamber interferes with combustion at light loads??

I wonder how it would perform if one were to let the governor control the rack directly, then simply leave the "throttle" valve wide open? Like virtually all other diesels lol.
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  #35  
Old 06-10-2016, 11:59:10 PM
ronm ronm is offline
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Default Re: 1-71 detroit diesel (GM)

That's a pneumatic governor, just like a Simms pump on a Fordson Major. Some of the British IH tractors used it too, as I remember...They actually worked better than you would think.
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  #36  
Old 06-11-2016, 12:12:35 AM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 1-71 detroit diesel (GM)

The other option was a hydraulic governor. If it was used as a power generator when you needed good speed control. A control rod connected from the gov. to the control rack. It was driven off the end of the blower. The butterfly then could be used as a emergency shut downClick image for larger version

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  #37  
Old 06-11-2016, 12:57:22 PM
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Default Re: 1-71 detroit diesel

Chris Do you have any info on serial number manufacturing dates for 1-71`s. My block S/N is 171-533. In the old Detroit service data books they showed S/N runs for each year Thanks Al
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  #38  
Old 06-14-2016, 11:05:32 PM
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Default Re: 1-71 detroit diesel (GM)

Marine 4-51 currently sat in my yard. You can see the actuator rod coming from the butterfly.

Cheers
Nobby
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  #39  
Old 06-15-2016, 10:51:26 AM
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Default Re: 1-71 detroit diesel (GM)

Oh yeah Vacuum Control as being discussed is fairly common in some vehicles, Mercedes used it and I have seen it on Isuzu and Toyota. As Ron said works well.

Cheers
Nobby
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Old 06-16-2016, 07:53:55 PM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 1-71 Detroit Diesel (GM)

As the gear train is on the front of the engine the balance weights are inside the flywheel housing behind the flywheel. The oil pump is an external gear pump driven by the camshaft. The cam, balance shaft and crankshaft gears all have 50 teeth. ( no idler gear) There are left hand timing marks on the gears because of their location to achieve a right hand rotating engine. It sure looks like the 1-71 was their prototype for the later 71 series. Aloha AlClick image for larger version

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