[AT] Case 400 Diesel

[Gene Dotson]

    Ken;
    The first stage filter element is Case #A10557, Second stage is A7627 
and the final stage filter is09985ab1. The final stage is a sealed assembly 
and replaced as a unit. NAPA can cross these to Wix numbers. They are still 
available. The final filter may be a dealer only item.
    The fuel pump is an American Bosch. The pumps for early 700 and 800 
tractors will fit. 700 and 800 have higher governor speeds. All tractors 
went to inline Bosch pumps in 1959. Watch ebay if you need to replace it.
    The injectors are relatively easy to clean and the tips can be removed 
and cleaned in gun cleaner or MEK. Spray tips are the same as used on all 
power cell engines and are the same on Allis Chalmers and Minneapolis 
tractors of the period. The copper gaskets can be reused by annealing them 
by heating to a dull red and quenching in water, this will soften them so 
they will reseal.
    The tractor is definitely worth saving. They are very tough and 
reliable. Brings me back to the question of why it was parked for so long, 
and now we know.

                    Gene


----- Original Message ----- 
From: "Ken Knierim" <ken.knierim at gmail.com>
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com>
Sent: Saturday, March 24, 2007 6:02 PM
Subject: [AT] Case 400 Diesel


>I had a chance to spin some wrenches on the tractor I brought home
> from Yuma today. I took Gene's advice and pulled the compression
> release, pulled the valve covers and checked to make sure everything
> looked right. I squirted some oil in the cylinders and looked
> everything over good. (Thanks, Gene!)
>   Then I took a wrench and put it on the nut on the end of the
> crankshaft and gave it a spin. It resisted ever so slightly then spun
> freely. Feeling better about my "treasure" I put a battery on it and
> gave it a spin with the starter, which worked fine. My neighbor
> dropped over and I asked him to watch the oil pressure and make sure
> it came up when I hit the starter. It hit 25 PSI and climbing, just
> with the starter and no compression.
>
> Then I decided to open the fuel filters up and figure out what the
> part numbers were on the filters so I could replace them and maybe try
> starting it... (guess I was feeling too good about myself)
>
> Someone had put water in the fuel system, and it has sat that way for
> a long time. That's the only explanation for it as 2 filters have been
> removed, a third has been added (between the transfer pump and the
> main pump) and they all had large amounts of rust in them. There was
> still water in 2 of the filter housings. The fuel tank had some rust
> in it but I hadn't even considered it possible that someone might have
> done this deliberately. It certainly looks like it was sabotaged and
> left to sit. The 2 factory-looking purolator filter housings had the
> filters removed from them so I don't have a clue on the part numbers;
> the third filter looks like a farmer add-on. All had rust in them and
> the line going directly into the main pump has rust in it too.
>
> Sooo..... this might be more of a project than I am ready for. I
> suspect that the American Bosch injection pump is at least damaged,
> possibly destroyed by this kind of treatment. I've never had an
> injection system apart as Dad always indicated they are rather
> sensitive and are best left to the professionals (he doesn't take them
> apart and it's about the ONLY thing he doesn't know how to tear down
> and rebuild).
>
>>From what I have been able to find, this tractor was parked for
> probably at least 10 years in the Arizona desert. I think it is
> because someone put water in the tank and it got run 'til it quit.
> That's probably what caused it to be sitting in the back of the parts
> lot.
>
> What does a rebuilt pump cost for something like this? Assuming it got
> water into the injection lines, would I be better off just scrapping
> the tractor out? I hate to do it.
>
> Any thoughts? Comments? Direction?
>
> Ken in AZ
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