D6100

[quote="1951D2"]Weekend work
Was able to spend some time on the engine today. Removed the fuel system and now the engine will turn over. Will need to disassemble the pump completely and polish it up good. At least it wasn't something broke internally and making it not turn over.Click image for larger version.





Hope this all worked, I screwed this up and it ended up over in the wanted section.[/quote]

Hello 1951D2,

If ever you need a thread moved let us know and we can move it. It is a very simple process for the Moderators and Administartors.

Just ask.

This fact applies to anyone and everyone. Again, Just ask.

Other than all this, I wish you all a very Merry Christmas and Happy New Year.😖mile:

One more thing, I removed that other post for you too.

Thank you and MERRY CHRISTMAS

Spent some time in the shop this morning. Started to take the fuel system apart to see how bad it was. Stuck racks and that created some issues to get all the pump bodies out, but in the end got all out of the housing and took two apart to see what I have.

[attachment=39491]IMG_20161225_091004914.jpg[/attachment]

[attachment=39492]IMG_20161225_091742466.jpg[/attachment] Got this one out but the next one was a challenge due to the rack being stuck.

[attachment=39493]IMG_20161225_092757787.jpg[/attachment] I had to take the unit apart in the housing so I could get the rack to move so the housing would come out of the pump housing. Even at that they are a close fit to come out.

[attachment=39494]IMG_20161225_104527817.jpg[/attachment] Removed all the pieces and found broken springs in two of them, but after cleaning up the parts the plungers and barrels seem to look in relatively good shape. Used my eye spy and got a 10 plus power look and was pleasantly surprised.

Now to take the camshaft out of the pump housing next. It is stuck to the point it will not turn at all. The lifter assemblies are extremely rusted.

The lifters have a roller retained with a press fit pin. You need to make a support block with a radius to suit the lifter to remove the rollers that are sure to be ruined from rust. New rollers? Got a cylindrical grinder?

Done a lot of valve jobs, but have never seen exhaust valves with these threads on the stem before.
Can some one tell me the reason and or purpose please.
I guess I should fill you in. this is from the cylinder head off my D6100.

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Hi Team,
later exhaust valves do not have the thread looking section on their deflectors.
The deflectors deflect the out rushing exhaust gasses from passing up the valve guide/stem clearance.
Oils and metals were not like we have today so this would be an attempt to stop valve stem lube oil carbonizing up and causing sticking valves.

Cat later went on to be a world leader in oil technology, hence the single cylinder Laboratory Test engines that are much sought after, and marketed their own Superior brand of oils to combat carbon deposits, sticking valves and rings--I guess we could say Detergent or Series 3 oils and so on that we have today.

Feel free to add more on this I am no expert on Tribology--study of lubrication.

Can only assume the thread looking section is for cooling the stem due to low quality valve metals and oils of the day.
These engines are the second generation of mobile tractor engines and were at the cutting edge of Diesel engine design and technology for their day.

First generation Diesel engines were in the Diesel 60/65, namely the D9900.
The D9900 Industrial version was current from 1932 to 1934.
The D6100 Industrial version was current from 1933 to 1935.
Cheers,
Eddie B.

Thanks so much for the info , all makes good sense to me.👍
Thanks Eddie

Well, Dana from Florin Tractor came to the rescue for the springs I needed. Pretty neat stuff, still in the original box!! He was very easy and professional to deal with. I will show some pics of them below.
Same thing happened when I was doing my D17000. I got valves that were still in the cosmoline and original boxes.

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