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Author Topic: SOM flywheel upgrade!  (Read 3985 times)

BruceM

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SOM flywheel upgrade!
« on: October 19, 2017, 02:06:40 AM »
Thanks to 38ac I got connected with another member Robert Leonard, who had some SOM flywheels for sale.  Bob did a great job of securing them to a sturdy pallet and getting them loaded on my freight carrier 8 days ago.  Today I picked them up at my local helpful Ace Hardware.

They are now on my shop apron ready for some clean up and new paint! They are a bit shocking to a someone only familiar with Rajkot castings; there are no voids, putty, bondo!

I'd like advice on your favorite rust treatment that does not involve Rustoleum type oil based paint.  I just can't stand the stink of it. I'm thinking sand and wire brush, naval jelly, then paint. I'm in AZ, USA, so continued rusting is not a big issue, I'm just proud of them so want to pretty them up a bit.



« Last Edit: October 19, 2017, 02:27:34 AM by BruceM »

broncodriver99

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Re: SOM flywheel upgrade!
« Reply #1 on: October 19, 2017, 04:32:03 AM »
Those should make for a nice upgrade. They really are nice chunks of iron aren't they. Mine are sitting in the floor and look much like those, just waiting to be stripped and painted.

As far as a coating I settled on a single stage urethane paint. Urethane is pretty stinky and a respirator should be worn but most any decent coating is going to be. Most are brush-able if you don't have spray capabilities. Or, I think Eastwood makes some urethane paints in aerosol form. I have seen a few CS on youtube where the outer rim was left unpainted and clear coated. Looks like a nice detail to showcase the cast iron and makes the serial number and ignition/timing marks easier to read.

32 coupe

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Re: SOM flywheel upgrade!
« Reply #2 on: October 19, 2017, 04:36:02 AM »
Wow Bruce,
I am happy to see you finally found a pair !

I am sure many of us are anxious to see how they work out for you.

Gary


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Samo

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Re: SOM flywheel upgrade!
« Reply #3 on: October 19, 2017, 07:51:45 AM »
Nice wheels. In my case after cleaning, de-greasing, I used an etch primer then sprayed 1K enamel in mid-brunswick green. I don't think the 1K paints are too bad, there's certainly more toxic paints out there. Still I wear long sleeves, goggles and a mask just to be on the safe side! 

Samo
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AdeV

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Re: SOM flywheel upgrade!
« Reply #4 on: October 19, 2017, 10:59:46 AM »
AZ? Any old paint will do - so long as it's mid-Brunswick Green  :laugh: and can be applied smoothly (no brushes! unless it's coach paint...) Hell, you'd get away with no paint at all most likely!

I'd use cellulose based paint myself, 'cos I'm old school, and because I don't have a 2-pack setup.
Cheers!
Ade.
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1x Lister CS Start-o-Matic (complete, runs)
0x Lister JP4 :( - Sold to go in a canal boat.

BruceM

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Re: SOM flywheel upgrade!
« Reply #5 on: October 19, 2017, 03:28:25 PM »
Thanks for the prep and finish suggestions. Green she shall be.  Ade's right- it doesn't take much for our environment here in AZ. I have unfinished angle iron bits on my engine for sensors, pneumatic actuators and such, and an oily rag wipe down occasionally is enough to keep them rust free. 

It sure is going to be interesting trying to match these flywheels to match per 38ac's method.  Piece of cake when you can readily lift the flywheel by hand, quite a bit more serious with these monsters.  I will go slow.



Tom

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Re: SOM flywheel upgrade!
« Reply #6 on: October 19, 2017, 05:38:27 PM »
The easiest way to clean them might be to take them to a local engine rebuilder and have them hot tanked. Nice find.
Tom
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BruceM

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Re: SOM flywheel upgrade!
« Reply #7 on: October 19, 2017, 07:27:25 PM »
Tom, I think you're right-  I've seen the before and after photos of hot tanked parts here recently and it's amazing what a good job that does.  Alas,  I'm so rural that it's not so practical for me. Local shops only have solvent tanks for smaller parts.

I couldn't resist giving the flywheels some attention by hand this morning; a few hours with 80 grit discs on a  5" air palm sander, and a drill- drum sander inside the cutouts, and some pressure washing. They cleaned up very nicely.  Myself and my clothes are another matter.

I think I'll going to use Bronco's suggestion and NOT paint the outer rims- until after they are installed. That way I can roll them about - which is the easiest way to move them.

glort

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Re: SOM flywheel upgrade!
« Reply #8 on: October 20, 2017, 01:25:14 AM »

Sandblast them and apply a good coat of clean veg oil.  DONE!

It's all about "Patina" now days anyhow so maybe leave them out in the rain between the sand blast and the oiling to give them a nice surface rust and then hold that with the oil.

I have been using veg as a rust preventative for years. Never seems to need re doing for things out of the weather, needs a recoat every couple of years for things outside but still must get into the metal a bit because you only get a very light surface rust even when the oil goes hard and flakes off.
If you want to turn mild steel in to something as corrosion resistant as stainless, heat it red hot and quench.  Done that with a few rough tools I have played blacksmith on and they live outside and never get rusty after years of weather exposure.

No, those wheels are not too big to get red hot,  I can show you how to build an oil burner to get those wheels or the whole engine red hot in under an hour, probably 30 min!  :0)

Was at the paint shop the other day with the Mrs. You can buy rust look paint now and it's freaking expensive.
Mrs liked the look for a feature wall till I saw the price and realised I could to the same wall in 1/4" steel plate with real rust cheaper than painting the gyprock!

I have seen a lot of engines on the net and at shows that are dirty and grimy and I wouldn't change them should I be lucky enough to own them. Matter of fact, I'd be careful about disturbing the decades of built up grot.  Somehow, to me anyway, it seems to honor and pay testament to these old treasures.

xyzer

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Re: SOM flywheel upgrade!
« Reply #9 on: October 20, 2017, 02:43:19 AM »
Bruce..Are they from a Lister 6/1 going on Listeroid? If so I bet it will be minor tuning.
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BruceM

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Re: SOM flywheel upgrade!
« Reply #10 on: October 20, 2017, 03:01:26 AM »
Hi Dave,
Yes, 6/1 SOM wheels on a 6/1 Listeroid.  I will match the balance but agree not likely to be off much.

I've seen the patina look Glort mentions- someone used some stove black and had a great looking show (or working) engine. Vegetable oil, oxidized, makes that coating that works so well on cast iron skillets and griddles. Only soap or detergent ruins it. 

Alas, patina on a Rajkot Listeroid engine seems an odd mix, so I painted the wheels Lister green this afternoon when the rain stopped.  I'm going to give the engine a bit of a touch up  and give my original wood ''temporary test'' base a coat as well. It really has held up nicely but since I've got extra paint I'll doll it up.

dieselspanner

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Re: SOM flywheel upgrade!
« Reply #11 on: October 20, 2017, 08:05:40 AM »
I painted my CS with Lidl's (A German based pan European supermarket chain that sells all sorts of stuff on weekly offers, paint comes up a couple of times a year) spray cans in a sort of Brunswick green.

It comes up like Hammerite Smoothrite, I wouldn't be surprised if it was a a similar composition with a different solvent.

It's around 3 euros a can (I used around 8 on the CS and after 3 years it's still looking good) and when it comes around I buy loads of black and grey for doing odd jobs, brackets and the like.

Cheap, that's me!

Cheers Stef
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38ac

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Re: SOM flywheel upgrade!
« Reply #12 on: October 20, 2017, 11:42:07 AM »
Glad everything worked out for them. Be extra careful that your gibb keys are well fitted as the extra "smoothing" forces the heavy 'wheels  provide is  transmitted through those gibb keys and the friction fit to the shaft that they provide.
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cujet

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Re: SOM flywheel upgrade!
« Reply #13 on: October 20, 2017, 12:47:25 PM »
Interesting looking flywheels. I've never actually looked at SOM flywheels. Cool balance methodology. Post more pics!
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BruceM

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Re: SOM flywheel upgrade!
« Reply #14 on: October 20, 2017, 07:57:28 PM »
One of those du-oh, moments this morning.  Flywheels look great, set up my stands for balancing and then noticed- no ground clearance for the wheel bottom.  Oops.  The SOM flywheels are 25 inches diameter, not the 23 1/2 of my spoke'd wheels. This will require modification of the base- not quite enough clearance for the belt on flywheel and a new 9 inch generator pulley and belt. I'd likely have to change to a single B belt instead of serpentine to get the right diameter generator pulley unless a 9" serpentine pulley is common. 

I'll have to ponder it and study the costs for a while, but I may postpone the upgrade to SOM wheels until I'm ready ($) for the propane conversion, which increases engine speed to 824 rpm. I'll need new pulleys and B belts for both generator and air compressor for that.  I can manage diesel fuel hauling and transfer now but want to be prepared.