Bukh DV20 lift pump

[Poignard]

My pre-lift pump filter is 2 microns. I presume that if Bukh did indeed suggest removing the diaphragm inside the lift pump to someone, it would be because 1) It isn't doing anything useful and 2) It does potentially cause a problem with the seal when you reassemble the pump. I would not have reefed down on those screws, but I do recall some minor difficulty getting the diaphragm to fit back in properly. I will check it carefully. Thanks everyone for your input.

BTW I have also looked into replacing the pump with a newer version, and that newer version does not appear to have a diaphragm - at least not one that is accessible for cleaning.

Paul

I replaced my BUKH lift pump around 20 years ago and the replacement was a sealed unit. I assume it has no filter in it because if it did, it would be inaccessible for cleaning.

I have the original BUKH engine installation instructions for my DV10ME and there is no filter specified between the lift pump and the fuel tank although many, me included, have one fitted.

 

[Boater Sam]

Whose recommendation?

Common rail diesel engine makers.