MF 135 fuel leak

[Red Rex]

I have a fuel leak on the bottom of the injection pump as shown in the photos. Is there an O ring that I can replace or crush washer? How involved is it?

 

[Dieseltech]

It MIGHT be the banjo washers, 5936 332C. Might also be the hydraulic head O ring, if so the wise thing to do is have the complete pump re-sealed and tested. I have an MF 180 pump in now for leak trouble too..

 

[Red Rex]

The leak is coming from where that bolt goes through the fitting into the pump

 

[ptfarmer]

(quoted from post at 13:53:03 06/25/20) The leak is coming from where that bolt goes through the fitting into the pump

It may look that way, but it could be hydraulic head o-ring as Dieseltech said, had that happen to me once, and new banjo washers didn't fix it! Now whenever I see one leaking like that I reseal the pump, the o-ring is more likely to fail than the banjo washers.

 

[Red Rex]

Thanks for all the replies!

As I look closer at the pictures I can see a drop of fuel on the far left hand side. O ring replacement is going to be required.

Will I have to remove the pump to do it?

I have rebuilt carbs and engines but never anything diesel