Power Generator Type WG570a

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simondodkins
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Power Generator Type WG570a

Post by simondodkins » 18 Jul 2011 20:49

I recently became the proud owner of my first WWII German generator. It is a type WG570a and the engine was made by DKW auto union in 1942, and the generating part in 1940.

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The WG570a is a single cylinder two-stroke engine that runs at 3,000rpm and produces 220 volts at 2.6 amps, and was used to charge batteries and power communications equipment. It runs off a 1 part oil to 25 parts gasoline mix. There is a very similar looking variant generator which is almost identical, but is marked type HNG 100/58. I think the difference is the output current.

Now, the big question, what can I do to get this running again? I am guessing a general de-greasing clean, change of the spark plug, but beyond this, what should I do, or not do?

Can anyone recommend what type of two-stroke oil should be used? What octane fuel should I used? (I am guessing the lower the better?) I can get 87 here. Any help, thoughts or ideas welcome.

(Mods – not sure if this should be under communications equipment, vehicles or general equipment so if I have posted in the wrong place please move – thanks!)
Last edited by simondodkins on 18 Jul 2011 22:30, edited 1 time in total.

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Xavier
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Re: Power Generator Type WG570a

Post by Xavier » 18 Jul 2011 22:09

220v is the standard european voltage, . not only used "to charge batteries and power communication equipment"
any modern two stroke oil should do, 25:1 seems a little bit too high..
after it arrives, check if it spins freely, then post again here for advice on starting it..
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simondodkins
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Re: Power Generator Type WG570a

Post by simondodkins » 19 Jul 2011 03:23

Hi Xavier,

Bedanke!

I got the oil/petrol mix from this document titled "handbook on German Military forces"

http://www.ibiblio.org/hyperwar/Germany/HB/HB-8.html

About a 1/4 of the way down at section [VIII-38] you will see a listing of various power supplies for communications equipment and it lists the WG570a. It is listed as a "Engineer generator set" using 1 3/4 pints per hour (oil/gasoline 1/25). Not exactly sure what that means, but I assumed it to be the oil/petrol mix.

What should it be?

Best,

Simon

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Xavier
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Re: Power Generator Type WG570a

Post by Xavier » 19 Jul 2011 18:02

yes, I came across the same document while searching for some other info, but I have had several small 2 stroke engines in the past and the oil to gas ratio seems a little bit too high..maybe to be on the safe side and due to the 1940's war standards.. try the 25:1 ratio and if the engine smokes too much and the sparkplug gets fouled a lot you can go lighter, lets say, 30:1
for more info, go to http://www.smokestak.com , there are a couple threads on old german generators
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p.s. I saw that you posted the same request in the wehrmacht awards forum, there are a couple threads on generators there too...

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simondodkins
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Re: Power Generator Type WG570a

Post by simondodkins » 21 Jul 2011 20:39

Thanks......I am picking it up tomorrow from the docks so over the weekend I will be able to provide a much fuller reply. The previous owner tells me it was turning over freely and he pulled the pull-start out a little, and it did seem to have some compression. I'll know a lot more this weekend!

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simondodkins
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Re: Power Generator Type WG570a

Post by simondodkins » 22 Jul 2011 19:33

Well....just back from the docks, having collected said generator. The outside box has seen some battering over the years, and is a little out of shape, but nothing that some care cannot solve. The box has maybe 15% of the paint left. Inside, the generator bout 20% of the paint is peeling and certain parts of the generator will need repainting. The pull start comes out to a point and then stops...so I will have to look closer tonight when I get home.

The biggest issue so far is a cracked manifold between the carburetter and the cylinder. The carb assembly actually moves. Whether this can be repaired or not remains to be seen. Here is a pic:

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Any thoughts on repairing this?

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K-9
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Re: Power Generator Type WG570a

Post by K-9 » 23 Jul 2011 11:44

That's nasty - however it can be fixed by an automotive shop that does TIG-welding. Usually asociated with custom or hot rod engine heads and manifolds repairs, but not limited to. Good luck.
However, I think that crack in the manifold is what kept your generator in such pristine condition. I suppose it cracked post-war, sometimes in the late 40's early 50's and because TIG welding was not available then (neither new replacement parts, since the German industry inclunding the DKW factory laid in runins or taken by the soviets ) they just put it to storage. Had the generator been functional i'm pretty sure it would have been used until dezintegration :D

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simondodkins
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Re: Power Generator Type WG570a

Post by simondodkins » 25 Jul 2011 18:41

Thanks, perhaps you are right that the crack kept it from being used. I've been recommended to use JB WELD

(http://www.jbweld.net/products/jbstik.php)

This is a cold weld epoxy which binds to anything and sets as strong as steel, and is resistant to heat, water, gasoline, etc. Tonight I am going to start gently stripping down the generator to get to this joint and see what can be done. Hopefully the less I have to take apart, the better. Updated photos to come!

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K-9
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Re: Power Generator Type WG570a

Post by K-9 » 26 Jul 2011 22:47

JB weld might work, it's just proper welding it's better. However, i suppose you don't want to use the generator on a regular basis(considering it's a collector's item) , i suppose you might just want to try it out a couple of times and thus JB weld migh be enough. Good luck.

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simondodkins
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Re: Power Generator Type WG570a

Post by simondodkins » 12 Aug 2011 19:14

Just an update to all. I cleaned off most of the flaking paint (it was impossible to save - every time you even touched it, great big flakes of paint came off) and color-matched a replacement touch up paint. The whole motor is currently in with a mechanic who has freed up the crank, the piston and the piston rings. The cracked carb manifold is currently with a specialist welder to see if it can be repaired - fingers crossed!

I'll post more pics and an update when I can.

Simon.

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Xavier
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Re: Power Generator Type WG570a

Post by Xavier » 09 Jan 2018 21:35

old thread, ut what the hell.. did yu ge tit running Simon..?
I am now in a quest to buy me a small auto union or nsu 200 genset if anyone has one for sale or a lead on one, please post here

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T. A. Gardner
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Re: Power Generator Type WG570a

Post by T. A. Gardner » 10 Jan 2018 04:53

If the manifold is cast, I suggest a re-weld using nickel rod. If you know a good welder this is the way to do. You can grind it out and make it look like it never happened.

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