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Generators & Electric Motors General Discussion Antique Generators and Old Electric Motors: Questions and answers about restoring and showing old power generation systems.

Generators & Electric Motors General Discussion

6-71 Delco


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  #1  
Old 10-06-2019, 04:10:08 PM
BigWowly BigWowly is offline
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Default 6-71 Delco

Hello all,
I've lurked for quite a while. This is my first post. I've included a picture hopefully because in my lurking I've learned 😁 I have some questions about a GM generator we are going to be setting up to use commercially because I'm not able to get the three phase where I need it from the power company. Figured I'd at least introduce the idea and project to see if anyone might be interested.
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  #2  
Old 10-06-2019, 04:13:32 PM
BigWowly BigWowly is offline
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Default Re: 6-71 Delco

Here are some more photos
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Old 10-06-2019, 04:27:02 PM
BigWowly BigWowly is offline
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Default Re: 6-71 Delco

Ok, so we're are looking for any information on the unit we can find. We're going to be running it Monday through Friday year round so I'm going to need service information, as well as any upkeep it maintenance information people may have. I understand that these weren't if the shelf units but rather assembled. This unit is set up for another voltage right now. We will have to switch the wiring to supply 480volt 3 phase. I have owned a 4-53 Detroit before so the engine isn't entirely foreign to me, but it does have some oddities. There are filters ALL OVER this thing. The two cartridge style and one spin on are fuel and oil. But there are at least two others I'm not sure what they are for. And it seems everything has a pet cock on it for draining. I also am a bit at a loss when it comes to the controller. I had an electrician doing a lot of our installation with the house electric that is not three phase, but he doesn't want to do anything that heavy duty. Can you guys help?
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Old 10-06-2019, 05:00:40 PM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 6-71 Delco

A very clean looking unit. The oil filter has been converted to a spin-on. The aft fuel filter is is the primary. The forward is the secondary. The aft fitting on the frame is fuel supply and the other one is return fuel to the tank. The engine has the original old style two valve cylinder head. I see a over speed-under speed governor to activate the emergency shut down solenoid. Post more photos of the engine, unidentified filters, governor governor controls. Get a Detroit Diesel 71 inline series service manual . AL
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Old 10-06-2019, 05:07:51 PM
BigWowly BigWowly is offline
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Default Re: 6-71 Delco

Thank you Al!I just went up to take more pictures!
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Old 10-06-2019, 05:09:52 PM
BigWowly BigWowly is offline
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Default Re: 6-71 Delco

The two "filters"I'm confused about are in the latest pictures. One is down low on the exhaust side. The other is up high and has a line that runs down to a fitting that looks like it goes down into the oil pan on the intake side.
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Old 10-06-2019, 05:28:35 PM
BigWowly BigWowly is offline
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Default Re: 6-71 Delco

Also, I'm not sure if the debate is still raging, but when I had the 4-53 there was quite a stir in which oil was correct to use in it given the different requirements these have from newer designs. I'm wondering what oil we should be running in this thing. I keep my intervals short because we rely on it. But I'm open to all suggestion. Thanks again!
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Old 10-06-2019, 05:49:37 PM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 6-71 Delco

That is a block coolant heater on the frame to help starting when is really cold. The other canister is a collector for the air box drains. It collects some oil and fluids that get into the air box. You drain it with the petcock when it gets full. The canister above the governor is a oil reservoir for the gov and needs no service. solenoid by the gov is for shut down. Looks like a speed control knob on top of the gov. Need better photo. Running 24 HRS a day for 5 days at 1800 RPM you are going to need a good muffler. and far away neighbors. AL
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Old 10-06-2019, 05:53:38 PM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 6-71 Delco

Quote:
Originally Posted by BigWowly View Post
Also, I'm not sure if the debate is still raging, but when I had the 4-53 there was quite a stir in which oil was correct to use in it given the different requirements these have from newer designs. I'm wondering what oil we should be running in this thing. I keep my intervals short because we rely on it. But I'm open to all suggestion. Thanks again!
Delo 100 40 wt.
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  #10  
Old 10-06-2019, 05:56:25 PM
BigWowly BigWowly is offline
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Default Re: 6-71 Delco

Sorry it won't be 24 hours a day. Probably about 6 to 8 hours a day 5 days a week year round. We're putting a 61 inch muffler on it.
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Old 10-06-2019, 05:58:39 PM
Vanman Vanman is online now
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Default Re: 6-71 Delco

And just to add, about the oil, these require a CF-2 rated, low ash, single weight oil, such as Chevron DELO 100, NOT 400. Is it SAE 30? Or 40? Al will know for sure.

Beautiful looking set, BTW!

Edit: posted at the same time. Thanks Al!

Keith
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Old 10-06-2019, 05:59:52 PM
BigWowly BigWowly is offline
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Default Re: 6-71 Delco

Also, the "plunger"on the side of the governor? What is that for? My 53 had a governor in roughly the same place but didn't have this plunger.
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  #13  
Old 10-06-2019, 06:02:25 PM
BigWowly BigWowly is offline
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Default Re: 6-71 Delco

Thank you for the info Dr! And company!
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  #14  
Old 10-06-2019, 06:07:18 PM
The Diesel Doctor The Diesel Doctor is offline
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Default Re: 6-71 Delco

Quote:
Originally Posted by BigWowly View Post
Also, the "plunger"on the side of the governor? What is that for? My 53 had a governor in roughly the same place but didn't have this plunger.
The plunger on the side of the governor is the fuel control rod to the control rack. It moves in and out with load changes. AL
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Old 10-06-2019, 06:08:38 PM
BigWowly BigWowly is offline
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Default Re: 6-71 Delco

Thank you Vanman. It has 15858 hours showing but looks to be in good shape. The gentleman that sold it to us fired it up with a glass jug of diesel fuel. I had heard a 53 before, but it was muffled. This thing cranked over for about two seconds and fired off straight out of the header the way it sits....I couldn't believe the sound... Really...I couldn't.
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Old 10-06-2019, 06:12:11 PM
BigWowly BigWowly is offline
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Default Re: 6-71 Delco

Problem is, I was so interested in about 100 other things when he was starting it up I only half saw what he did. And that was almost 8 months ago. Now that we're getting ready to install it I'm scratching my head on how to even start it up!
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  #17  
Old 10-06-2019, 06:13:59 PM
BigWowly BigWowly is offline
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Default Re: 6-71 Delco

Sorry 1,585 hours
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  #18  
Old 10-06-2019, 06:27:17 PM
Birken Vogt Birken Vogt is online now
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Default Re: 6-71 Delco

There was a thread here a few years back on a similar unit. Around April of '17.
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  #19  
Old 10-06-2019, 07:03:44 PM
BigWowly BigWowly is offline
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Default Re: 6-71 Delco

I just looked from March to May of '17 all I found was a 3-71 on a rail car.... Which was cool, but I assume not what you are referring to. Do you happen to have any other information such as what it was called? Or a link?
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Old 10-06-2019, 08:05:09 PM
Birken Vogt Birken Vogt is online now
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Default Re: 6-71 Delco

This thread was the one:

https://www.smokstak.com/forum/showthread.php?t=166486

There are a few other threads on similar machines. Type into Google

"site:smokstak.com" without the quotes, and after that phrase type in Delco or GM or anything else and you may be able to dredge up old threads about similar sets.

Sounds like a fun project, keep us updated on here.

My concern would be:

1. Do you really need this much power. The wrong generator free costs more than the right one at full price.

2. Would a rotary or other phase or motor conversion scheme be more cost effective.

Running a generator all day is like running a bulldozer all day, it is going to break expensively at least 4 times a year.
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