Diesel Fuel leak

I have a MF150 that is leaking fuel where the fuel line connects to the fuel pump. I've removed the connections, cleaned them and put them back together. I see no obvious sign of damage but it continues to leak. Any ideas ?

Are you sure it is not leaking around the throttle shaft, or the cut-off shaft, or the top "lid" part of the pump? Is it a CAV pump? They are prone to leak in these 3 areas. If so I have detailed instruction that I can post here to stop it. Tom

My 65's leaking around the top of the fuel pump. I assume I'll need some sort of gasket kit. If you've got better instructions, I'm all ears...

I'm fairly sure it's leaking around the bottom union where the fuel line to the injector connects to the fuel pump. There is a stud that goes thru a fitting and screws into the fuel pump, the fuel line then connects to this assembly. The stud has a washer on it that I suspect to be the source of the problem but there are no dealers in my area so it makes getting replacement parts difficult. Thanks for taking the time to read my post. I would like the instructions anyway if you don't mind posting them.

inspect the fuel line very carefully. I had a leak in one of the connections on my diesel 165, and it turned out that the double flare in the line had a small crack, but it wasn"t in the part of it that actually contacted the fitting. Took me a while and some frustration before I found the crack.

Sorry it took me so long to post back. Tom
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

Thanks to all for the information. Hopefully I'll put an end to the leak this weekend !