A surging Perkins...

[Seastoke]

Thanks for all the replies and suggestions - this evening we swapped the pumps over - not a quick job on a horizontal engine or one I really wanted to do. It seems it is the pump after all, as the same fault was there as soon as we started her up. I'll have to get it fixed by Diesel Bob - but have now racked up a reasonable engineering bill for no particular reason and spend lots of time covered in diesel!

the exsperiance will pay you back.

 

[Assassin]

And you won't rust if you are covered in diesel.

 

[nicclark]

I think you are right, I've learned a lot and none of me has rusted in the last few weeks ?

 

[vas]

good result!
I hear covid doesn't like the smell of diesel as well, so you should be safer

 

[burgundyben]

About 15 years back I swapped pumps on a 6.354, I had one that had the fuelling turned up a bit, fitted it, no matter what i did it hunted up and down all over the place. No matter what i did it wouldn't run right, Swapped it back over in the end and engine was fine. Took it back to the pump shop who said it was fine. Never worked out the cause.

 

[Assassin]

I may be able to answer that Ben, output pressure and mismatched injectors, if injectors are replaced they are not always set with the correct break pressure or they are right at the top of their recommended break pressure and the pump gives sufficient output pressure to open them and not quite enough to also deliver the correct quantity of fuel, had a couple of these engines and once the injector break pressures were set in the middle of their max/min break pressure they ran fine.

 

[omega2]

I admire your tenacity, well done for putting your hands into the gubbins and sorting the problem for yourself. Not many of us left. LOL