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Fiat 702 Tractor


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  #21  
Old 12-18-2017, 11:21:54 PM
Oilpulled Oilpulled is offline
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Default Re: Fiat 702 Tractor

Phil-Post 19: That's the way to repair cast iron. I've done it a little on a manifold. Heat it in a charcoal fire, weld and then bury everything in wood ashes. It's hot work!
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  #22  
Old 12-20-2017, 01:09:52 AM
Charlie1925 Charlie1925 is offline
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Default Re: Fiat 702 Tractor

Phil Johnson, Norm Johnson and Aultman Taylor; If anyone of you guys ever worked on a Allis Chalmers model " L " built between 1922 & 1927 you would have ran into bolts and nuts that are also WHITWORTH. I ran into that back in 2009 -2011 when I was reworking my " L " Allis Chalmers, I too was a little puzzeled as to what was going on. Brake out the metics and all sizes of adjustables. Keep us posted on this project. Roger Weinhold AKA Charlie 1925.
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  #23  
Old 12-20-2017, 02:04:10 AM
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Default Re: Fiat 702 Tractor

Not a problem here, Charlie as I also play with old Brit sports cars so have a pretty complete set of whitworth tools, wrenches and sockets.

As for Allis 'L', I have had the chance to work on one that a friend had here for a while. There are three in this area that I am aware of.
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Last edited by Phil Johnson; 12-20-2017 at 02:07:26 AM. Reason: More info
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  #24  
Old 12-21-2017, 03:17:03 PM
Norm Johnston Norm Johnston is offline
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Default Re: Fiat 702 Tractor

Since restoring the Avance tractor I have gained several spanners and sockets with measurements in 32 nds and these do fit the odd ones in between metric and imperial in 16 ths. keep up the good work
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  #25  
Old 03-06-2018, 04:03:24 PM
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Default Re: Fiat 702 Tractor

Any updates Phil?
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  #26  
Old 03-06-2018, 10:44:48 PM
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Default Re: Fiat 702 Tractor

It is a 703. Still waiting on the engine block which is still at the welding shop. A new dual fuel tank is being made and should be ready soon. It's kind of a complicated thing to make.
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Old 03-14-2018, 08:54:00 AM
Davide L. Davide L. is offline
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Default Re: Fiat 702 Tractor

Hi Phil,
i have missed your thread about this amazing machine! AS David Parfitt wrote to you, it's a fiat 703. IF you need any help with the engine please let me know. I have several documentation on early fiat tractors.
Good luck with the restoration! I will be waiting for updates!

Ciao from Torino, where this tractor was built.

Davide
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  #28  
Old 03-15-2018, 11:16:59 AM
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Default Re: Fiat 702 Tractor

The engine welding is on hold for a while as Cal, the welder, has a broken finger and can't do any welding for another couple of weeks!!

I got the new fuel tank from Robb, the sheet metal man. It is a two compartment tank and the fuel selector valves mount on the boss on the bottom. I do some sheet metal work, but I don't have his skills with it!!
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Old 12-10-2018, 11:20:38 PM
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Default Re: Fiat 702 Tractor

I'll give it a bump again its been about 8 months. Phil, Any updates on the 703?
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  #30  
Old 12-11-2018, 12:23:22 PM
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Default Re: Fiat 702 Tractor

The engine block was successfully welded and I got it back some months ago. I was advised to let it age for a while like a new casting due to all the heating and cooling cycles it had gone through.
The block, rods and pistons are now at the machine shop as the bores will need sleeves as #1 and #2 had weld into the bore and 3 and 4 had grooves in the walls due to loose wrist pins. Sleeves will have to be custom made for this application.
Turning out to be an expensive repair!!
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Old 07-15-2019, 11:09:48 PM
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Default Re: Fiat 702 Tractor

what is the latest news?
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  #32  
Old 07-15-2019, 11:20:45 PM
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Default Re: Fiat 702 Tractor

Well timed!!! I was just about to post an update as I finally just got the block etc. back from the machine shop. It was a long wait as the sleeves had to be custom made due to their length and then the shop is really busy with their regular work which is custom rebuilding diesel engines for many customers.

I have a couple of other projects (not tractors) in progress at the moment and will probably get going again on it next week.
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Old 07-19-2019, 07:10:14 PM
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Default Re: Fiat 702 Tractor

Here’s a Fiat ad from the Canadian dealer...
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Old 08-01-2019, 09:59:52 PM
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Default Re: Fiat 702 Tractor

I finally got some time to work on the engine for the Fiat. Here are a few pics of the block after all the welding and machine work. Cal did an exceptional job on the welding and finishing as it's hard to tell that the block had all those cracks!
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Old 08-01-2019, 10:02:12 PM
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Default Re: Fiat 702 Tractor

The machine shop had to special order the custom sleeves to fit this headless block due to their extra length. They bored #2 and #3 and installed the sleeves and then honed them to give the proper clearance for the pistons.
I spent quite a bit of time today cutting the bevel reliefs for the con rods in the bottom of the sleeves. They left that for me to do!
I carefully cut the edges close to finished size with a good hacksaw and then cut the sleeve section out with a small diamond wheel. From there i ground it out closer with a 3/4 in belt sander and then finally finished with a good flat machine file and a very good light.
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Last edited by Phil Johnson; 08-01-2019 at 10:02:47 PM. Reason: spelling
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  #36  
Old 08-01-2019, 10:15:51 PM
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Default Re: Fiat 702 Tractor

I had a broken Hart Parr casting welded by Cal a month ago, probably one of the best cast welders in existence!
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  #37  
Old 08-02-2019, 10:33:54 PM
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Default Re: Fiat 702 Tractor

Wow, that looks great! I see what you mean about getting expensive.....
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  #38  
Old 10-20-2019, 07:56:48 PM
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Default Re: Fiat 702 Tractor

I've made a little progress on putting this project back together. I had to make all new rod bolts as the old ones were in pretty tough shape. Rods and pistons are installed, fitted into the block and the block is bolted back onto the crankcase with a new gasket. All gaskets have to be made as there is not much available for this engine.

The valves were in very good shape and just needed a light lapping to ensure good seating. Next is installing valve springs and setting valve clearance which is 2/10mm or .008 for intakes and 6/10mm or .025 for exhaust.

I lost my camera for a while, but it has now turned up so I'll have to get some more pics on here. Too many other projects in the shop!!
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Old 10-20-2019, 08:17:08 PM
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Default Re: Fiat 702 Tractor

I missed that last update, That block turned out really nice, can't even tell.
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  #40  
Old 11-02-2019, 10:51:30 AM
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Default Re: Fiat 702 Tractor

Here are the pics of installing the block down over the pistons.
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