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Antique Steel Wheel Tractors - Old Iron Lugs and Cleats Photos and information about antique steel wheeled farm tractors. This is where to find the heaviest of Old Iron tractors.

Antique Steel Wheel Tractors - Old Iron Lugs and Cleats

Fiat 702 Tractor


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  #1  
Old 11-28-2017, 10:31:35 PM
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Default Fiat 702 Tractor

I've got a Fiat 702 tractor of one of my customers in the shop for some repairs. Mainly to get it running and repair the cracks in the block. This engine is a headless design and has been badly frozen at some time (I suspect more than once due to and old braze!) There are a lot of cracks in this, but Cal is pretty sure he can fix it!
I have stripped the block and removed it, and taken to Edmonton Cast Iron Repair who have done other major cast iron repairs that have been documented here on the Stak. They did the repair on the Longfender Allis heads a couple of years ago and more recently welded together a manifold for my 17-28 TC.

Here are a few pics of the engine as it was stripped down and the block removed from the crankcase. The water jacket has an extreme amount of rust and corrosion but most of what I haven't removed will hopefully"cook" out in the pre-heat furnace.
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  #2  
Old 11-28-2017, 10:44:16 PM
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Default Re: Fiat 702 Tractor

please do your best to save that wonderful tractor
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Old 11-28-2017, 10:47:44 PM
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Default Re: Fiat 702 Tractor

After removing the valve port plugs, the valves were all removed and surprisingly, they are in very good shape and the seats look excellent.

The fun part was getting the nuts removed that fasten the block to the crankcase. This tractor seems to have a mixture of nut sizes on it. Some seem to be a metric size, but most are Whitworth. Fortunately, I had an odd old Whitworth wrench in my Whitworth/ BSF wrench drawer that fit most of the nuts. Needed a very thin wall on the box end as there is very little clearance between the nut and cylinder wall.

The block was carefully lifted off of the pistons which will be removed from the crankshaft later to check bearings. Number three seems to have a tight spot on the crank bearing which will have to be looked at.
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Old 11-28-2017, 11:04:19 PM
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Default Re: Fiat 702 Tractor

These last few pics show the cracks in the block which are pretty extensive. We decided to weld them as I believe it would be difficult to find a replacement block for this tractor.

The open top of the block is capped by a cover and gasket and the upper water pipe, comes off the front and has a short hose connection to the radiator.

I'll try to continue this thread as work progresses. It's a repair job for a local collector and not a restoration.
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Old 11-28-2017, 11:31:13 PM
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Default Re: Fiat 702 Tractor

I heard somewhere that somebody in Canada traded a Mogul 8-16 or 10-20 for 2 Fiat tractors. Is this one of those? If so that would make 3 Fiats in North America. Absolutely one of my favorite tractors. Please keep us updated and maybe share a video once it's running!!
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Old 11-29-2017, 11:56:46 AM
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Default Re: Fiat 702 Tractor

Tim I don't know if this is one of the ones you are referring to or not. I do know that this one came from Australia. If the freeze damage was done there, it must have come from the south of Oz.

I've had it running briefly before taking it apart. The cracks had been filled with some type of filler, but as the engine started to warm up, the cracks opened up and water was running out everywhere!
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Old 11-29-2017, 08:34:44 PM
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Default Re: Fiat 702 Tractor

Phil, what year is this Fiat approximately?
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Old 11-29-2017, 08:42:31 PM
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Default Re: Fiat 702 Tractor

Owner says it's a 1923. Casting date on the crankcase is 19-9-20.
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Old 11-29-2017, 08:51:33 PM
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Default Re: Fiat 702 Tractor

Here are a couple of pics of it when it arrived. The owner left the hood at his place as I didn't need it here.
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Old 11-29-2017, 09:28:35 PM
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Default Re: Fiat 702 Tractor

We had one in the past and it didn't have the reduction hubs? always thought the 703 had the reduction hubs?
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