[aquila787]

Hi Andy

I attach a couple of pictures of the magneto. I can’t seem to find it anywhere. The ones available have 2 legs whereas this one has 3.

Do you mean ……just replace the coil.

When I removed the magneto the thin wire came free very easily. Where should it be attached?

Is there a wiring diagram available?

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[aquila787]

Andy

He thinks it’s repairable…..I don’t know myself…..I’ve seen a worse example of piston on here I think which was repaired. It had a large hole in the top. I’ll find a piston somewhere if all fruit fails. I know at the end of the day it will cost more than I can buy a good working machine but that’s not the aim. I want to experience the restoration of an old machine.

John

[aquila787]

He’s going to drill them out and tap the hole for a grub screw as replacement. I suppose it’s worth a try. I’m hoping he’ll put loctite on them and if he drills right through that he’ll put a grubscrew with a lock washer on the back as well as the loctite.

John

[aquila787]

Hi

The engine builder is finding it very difficult to remove the piston ring pegs on my piston (part numbers 5268 and 5269) Have any of you done this or are they available to buy. I seem to remember reading somewhere that there might be a fellow in Switzerland selling some parts for these Simars. I attach pics.

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[aquila787]

Thanks Charlie

[aquila787]

Hi Charlie

It’s the RD310 I have. Could I get the drawing for that spring. I’ll do a Solidworks drawing of it if it’s not already in Solidworks and make available free.

John

[aquila787]

Hi again

Just wondering can the springs for the tines on this machine be purchased anywhere. If not I’ll draw them in Solidworks and see can I get them made.

The piston and cylinder is with engine remanufacturer at the moment.

John

[aquila787]

Found this maybe you’ve seen it already. There’s a few photos there too.
Practical Machinist.

https://www.practicalmachinist.com/vb/antique-machinery-and-history/ot-crawler-tractors-196276/index16.html

believe this to be an “Orolo” track unit, or a copy of one. “Roadless – The Story of Roadless Traction from Tracks to Tractors” by Stuart Gibbard has this to say about the “Orolo” track unit.

“One of Roadless‘s first and most commercially viable ventures was the introduction of the Orolo track units. Originally designed for the British Admiralty to transport a 6 in. naval gun over soft ground, the Orolo unit consisted of a self-contained bogie with rigid girder tracks running around two or three rollers. The track was designed to be self-locking so that it would form a predetermined radius to give it the same performance as an extremely large diameter wheel with very low rolling resistance.
The Orolo units were available in several different sizes, and could be used in place of the wheel in a variety of applications, including bullock and mule wagons for Africa, India and South America, log carriers and lifeboat carriages – and the Roadless drawing books even show details of an Excelsior washing machine so equipped in 1932, but for what purpose is not known.
When the Orolo unit was first conceived, a scaled-down version was tested on Philip Johnson‘s garden wheelbarrow. So successful was this unit, that Roadless decided to put the tracked wheelbarrow into production. A couple of hundred were made towards the end of 1927, and it became a popular addition to the company‘s early product line. At the other end of the scale were the D8 Oro1o track units, introduced in 1929 and capable of carrying 12 tons per pair. The company eventually built units during the Second World War which would carry 20 tons on each track-bogie. The Orolo track units remained in production until well into the 1960s.”

I can’t help but notice that at least two of the gentlemen at the John Allen & Sons (Oxford) Ltd. stand at the Royal Show are wearing spats.

The pub model(?)…

…and the export model(?). (Manufactured in 1929 by Khasia Sillimanite Company in India).

You can see one of the original patent documents for this type of track <here>.

G2 Orolo brought out in 1930 with rubber jointed tracks.

[aquila787]

Do you have photos. I dont know anything about it but I’d like to see it.

John

[aquila787]

John E-W

Every day’s a school day. What I thought was a split pin is the bottom piston ring divider. I attach a photo.

John

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[aquila787]

Wristpin

No I think you’re getting it wrong. Read it in this photo….not the one you added

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[aquila787]

Hi Wristpin

Attached is photo of the can of Owatrol oil.
It’s definitely better than WD40 anyway.

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[aquila787]

Now how do I remove this wrist pin. I dont want to do harm finding out. Picture attached

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[aquila787]

Thanks for the books Charlie.

I attach pictures of the piston and cylinder which finally came apart just now. The cylinder looks OK but I won’t know for certain till later. The piston has a little damage. Rings were broken. And a break between the rings as well.

Anyway what do ye think…..is it repairable?

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[aquila787]

Thanks Charlie. I could use a copy of the parts book please. Might not have to take the crank apart…..hopefully…..Will try get the piston out the bottom today. A lot of this is learning for me.
Thanks again.

John

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