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Ford Tractors Discussion Forum
:

1997 Ford / New Holland 4630 192CI Turbo Diesel Overhaul

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Jackle

02-11-2019 09:56:14




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Hello to the forum

I have gained so much info for years on this site, very grateful to all posting members. I am in the process of overhauling a 192ci diesel from a 4630 and found very little info on these tractors so I thought I would attempt to write up my own experiences. I am very much learning my way through a lot of this, and any tips are much appreciated. :D






The story:

This tractor was bought at an auction sight unseen with 1000~hours in the meter. Get it to the farm and she runs terribly, puffs a LOT of white smoke, even once warmed up. Intake was filled with oil, owner replaced the turbo. Running condition did not improve. Massive amounts of oil blowing out of crank breather tube on rocker cover.
The tractor was run in this condition for a lot of this past summer. During that time I did dry and wet compression tests revealing low compression and worn rings largely in cyl. 3 but also cyl. 2. Owner sends injectors out for rebuild.
To make matters worse I started seeing water in oil. Tractor is parked and overhaul is on deck for the winter.

So she was pulled inside last month and prepped for some fun work. Now I am in the middle of it!
I hope to update as I go with lots of pictures. Thanks to all who read

Jackle

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Jackle

02-11-2019 19:50:57




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 Re: 1997 Ford / New Holland 4630 192CI Turbo Diesel Overhaul in reply to Jackle, 02-11-2019 09:56:14  
Destroked

Thanks for response!

The unit build date is June 25 1997 and I have safely stowed the return line!
These pictures are from last week. I have since removed head and rod/ piston assemblies. There are no sleeves in this block. Honestly, things look pretty good in all three cylinders 3rd cyl rings were pretty torn up. I suspect this engine has seen work not long ago.

I was hoping to not have to split this baby but 4 oil pan bolts said otherwise.






Nothing gave me trouble to this point. Everything came off with minimal effort. And this whole machine was painted at some point with a thick coat of grey. I mean the injectors..every fluid line..everything. curious to this tractor's past life

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Destroked 450

02-11-2019 14:50:46




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 Re: 1997 Ford / New Holland 4630 192CI Turbo Diesel Overhaul in reply to Jackle, 02-11-2019 09:56:14  
The 4000 chassis which includes the 4630 is one of my favorite tractors.

What year model do you have, looks like a 94-97.

Sounds like you could have some broken rings and scored up cylinder walls.

Remove that plastic return line from the inj pump and lay it aside, the last one I priced was nearly $200 and is easy to break.

Pull the injectors then remove the head to get a look at the pistons and cylinders.

If the cylinders are scored very bad the engine will have to come off for complete disassembly and sleeves.

Some models came with headland ring pistons but they can be replaced with standard style if you replace all of them at the same time.

Look forward to seeing your progress.

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