[AT] Case 400 Diesel

[Jim Thomson]

Ken;

  Your tractor is worth saving. I had a similar experience with a TD9 
that I had picked up. The engine was slightly frozen but freed up after 
squirting some Marvel Mystery oil in the cylinders. After this the 
engine would run on the gas side of the engine but when I tried to make 
the switch to diesel it would just die. I pulled the injectors and got 
them cleaned up. The problem was  that the injector pump was frozen. I 
pulled it off and sent it to a place in Iowa who specialize in old 
diesel repairs. It was pricey at $500 for a complete rebuild, but when I 
bolted up the pump the tractor fired up on the diesel side.

Ken Knierim wrote:

>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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>  
>

-- 
Jim Thomson
Riverton,Utah
L50bmg at comcast.net
<www.fotki.com/JThomson/>