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Massey Harris & Massey Ferguson Tractors Discussion Forum
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MF 275 DEISEL LEAK

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SCHAP

01-05-2007 10:05:18




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HI..... I'VE GOT A SLIGHT DEISEL LEAK COMING FROM THE THROTTLE UNIT ON THE ENGINE ON THE LEFT SIDE NEAR WHERE THE CONTROL CABLE COMES IN TO THE THROTTLE. ANY HINTS? A BUDDY OF MINE OLD ME IT MIGHT BE A SEAL. IT'S NOT A SERIOUS PROBLEM IS IT? I JUST LIKE TO TIDY UP ALL LEAKS. THANKS FOR THE HELP.




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Your Welcome Schap

01-08-2007 12:57:17




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 Re: MF 275 DEISEL LEAK in reply to SCHAP, 01-05-2007 10:05:18  
Didn't hear from you. Tom



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SCHAP

01-08-2007 13:53:59




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 Re: MF 275 DEISEL LEAK in reply to Your Welcome Schap, 01-08-2007 12:57:17  
YES..... THANKS A TON. I'VE BEEN BUSY AND I REALLY APPRECIATE YOUR INFO. IT REALLY IS HELPFUL.THANK YOU FOR YOUR TIME AND EFFORT.



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TomTX

01-06-2007 01:54:17




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 Re: MF 275 DEISEL LEAK in reply to SCHAP, 01-05-2007 10:05:18  
Is your pump a CAV? If it is a CAV, I have been there done that. The CAV is prone to leaking around the throttle shaft and the cut-off shaft. First you will need to get 2 or 3 cans of engine cleaner. Clean, clean, and clean again the whole area. After each spraying, hose off, let dry and do it again. Cleaner the better, if you drop a ball of grease/dirt into the top while the cover is off - big trouble, one piece of crud dropped into the bottom of the pump will cost you about $600-700. Now using a paper towel, start looking for your leak; it will show up real easy on the dry, clean paper towel. 1. MOST important thing is to have some paper and pencil BEFORE you take off the cover.
2. Remove shut-off linkage and throttle linkage. 3. Remove screws or nuts holding lid on. 4. DO NOT just lift up the top. Lift it just a little, very carefully so you can peek under it. A spring is attached from the lid to the bottom part of the pump. One end of spring is hooked on a wide post looking like a tombstone. The tombstone has several holes in it. Write down which hole the spring is hooked in before you remove it. The other end is through one of the holes in the flattened end of the control rod. Again write down the hole it is in before you remove it. This step is VERY IMPORTANT. If the spring is not reassembled to EXACTLY the same holes on both ends, the tractor will never run right again. The same pump can be used on different model tractors with the only difference being how the spring is hooked. My MF dealer mechanic can tell the proper holes by using the 3 numbers on the CAV. Now remove the spring, and lift off the lid. 5. Write down the model/year of tractor, and the model of the CAV pump and serial number. There are 3 different numbers on my CAV pump.
6. Take the cover with you and head to MF dealer and purchase a new gasket and four (4) tiny o-rings that fit around the throttle shaft and the shut-off shaft. Each shaft has 2 o-rings. If the o-rings are not leaking now, they soon will so replace all of them. Total cost of gasket and 4 o-rings is about $5 or $6. 7. You will need a little patience and two extra hands to get the spring attached on both ends and the new gasket fitted. I did this complete procedure on my MF 690 and now it has NO LEAKS.
Tom

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