Lister Engines > Original Lister Cs Engines
Lister 6/1 startomatic
Bohana:
Hi all,
this is my first post so forgive me if I am writing about something that makes all you harden lister veterans eyes roll.
I have purchased a 6/1 SOM which I am struggling to find any details of or even an image of one that looks like mine.
Basically it came out of an Exeter police station ... I am guessing it is quite an early one.
The strange thing is it has two gen heads connected by a shaft , one says "generator" on it and I have put 24V into this and the belt happily drives the lister and starts it , the other head says "alternator" 220 -240v ....
My question is I cant work out how the batteries get charged the "generator head" does not seem to put out any voltage (yet happily spins when I apply voltage , is there a blocking dioide preventing the current going back??)
also it seems like the AC alternator needs excitement to work (would I be right in those thoughts ? if so does excitement need a permanent 24v DC feed?
sorry to ask but I am totally new to a SOM but .. I have to say what an awesome piece of engineering :))))
Oiler:
Pictures are allways welcome 8)
AdeV:
--- Quote from: Bohana on January 03, 2020, 09:14:32 AM ---this is my first post so forgive me if I am writing about something that makes all you harden lister veterans eyes roll.
I have purchased a 6/1 SOM which I am struggling to find any details of or even an image of one that looks like mine.
--- End quote ---
The only eye-rolling will be jealousy that you have an interesting - possibly unique - machine! I've seen Listers set up with a direct shaft drive to a DC generator/dynamo (this was usually the 9/1, which was basically a single cylinder JP engine rather than the usual CS, one solid flywheel).
--- Quote from: Bohana on January 03, 2020, 09:14:32 AM ---Basically it came out of an Exeter police station ... I am guessing it is quite an early one.
--- End quote ---
If you've got the serial number - from the info plate, it'll also be stamped in the outer rim of each flywheel if the plate is missing, then we can date it to the nearest year.
--- Quote from: Bohana on January 03, 2020, 09:14:32 AM ---The strange thing is it has two gen heads connected by a shaft , one says "generator" on it and I have put 24V into this and the belt happily drives the lister and starts it , the other head says "alternator" 220 -240v ....
My question is I cant work out how the batteries get charged the "generator head" does not seem to put out any voltage (yet happily spins when I apply voltage , is there a blocking dioide preventing the current going back??)
--- End quote ---
Alternators are a black art to me, I'm afraid, although there are plenty of knowledgeable types here who will surely come up with an answer. As to the generator - that's presumably the original 2.5kw Lister unit; it should take 24v DC to start, the SoM box then does some trickery which starts outputing 250vAC. Or should do. Could be you've got a burnt out wire somewhere. I don't recall if these need residual magnetism to generate. Unfortunately, my own original SOM generator is toast, I've had to replace it with a boggo ST5 alternator & separate starter motor.
Anyway, as Oiler said - pictures are always welcome! If you re-size any pictures down to 800x600 or thereabouts, you can attach them directly to a message (click "Attachments and other options, below the message edit box); we also have our own photobucket-a-like hosting service, there's details in the Members Only forum as I recall, or maybe the General forum. It should be a sticky post & therefore at the top.
Cheers!
Ade.
Bohana:
Thanks for your replies chaps , I am making good progress with the control box (which was a three man lift just getting it in) I now have the 24V generator giving out 33 volts once the lister is up and running , this 33volts DC is then exciting the coils on the alternator which is now giving out a healthy BUT over voltage 290v AC , there is a voltage adjuster on the control board which adjusts the DC voltage into the exciter circuit and in turn adjusts the AC output (I need to give it a good clean and test).
The lister seems to have started life as a 5/1 then at some point upgraded to a 6/1 , you can see where lister have re-stamped the 5 with a 6 on the serial number plate.
I will post PICs as soon as I can
Thanks again
AdeV:
Unless it's a very early model, the only difference between the 5/1 and the 6/1 was the rated speed (650rpm for the latter, 600rpm for the former). And I'm not even sure there was a mechanical difference for the first ones. The 3/1 (and 3.5/1) engines had a thinner crankshaft IIRC.
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