Mf 165 fuel issues

[jondear]

Hi I have a 165 that keeps stopping .
.Bleed it through from filters to injection pump air comes out on small bleed screw on pump .Crack off injectors from right to left .Had it running for 5 mins then stops again .Can't get air to stop now on pump bleed.Would it filters or lift pump diaphragm leaking ?Thanks

 

[chipchap]

Diaphragm on lift pump gone perhaps

 

[TheTallGuy]

There's several possibilities, first is that the gauze on the tank outlet is blocked - crack the pipe off the bottom of the fuel tap - if fuel does not run free then either the gauze or the tap is gunged up.

If it runs free then reconnect the pipe and undo the pipe into the injection pump, operate the priming lever on the lift pump - if fuel doesn't flow freely then either the filters are blocked or the diaphragm is likely knackered. If fuel does flow free then it's most likely to be the gauze in the injection pump. The backplate can be removed from the pump in situe, but I would recommend doing a reseal on the pump if it hasn't been done for a few years as once they start sucking air they can become prone to air leaks.

 

[jondear]

Diaphragm on lift pump gone perhaps

It did it about a month ago and was ok till now .The tap From the tank is plastic and broken up .But I suppose if take off pipe Should run free to eliminate the tank gauze .

 

[Exfarmer]

It did it about a month ago and was ok till now .The tap From the tank is plastic and broken up .But I suppose if take off pipe Should run free to eliminate the tank gauze .

sure it is not sucking air through the broken tap?

 

[jondear]

sure it is not sucking air through the broken tap?

Could be .It was like it when we bought it a few months ago .And was serviced supposedly by Howard's

 

[tomlad]

I fitted a new replacement tap on mf65 plastic nylon tap .
Horrible thing replaced again now with a metal one, much better.

 

[Netherfield]

I never liked MFs idea of rubber seals on the pipes to and from the lift pump, always thought olives were a better idea.

I had a '50' that would go for ages and then decide to stop, invariably when out on the road away from the farm, it was down to those rubber seals.

 

[tomlad]

Also new one had a filter stalk that didn't fall off .
Issues with gritty stuff in tank , washed many ,many times

 

[startinghandle]

Had similar problem with my dexta
Tightened small screws on top of lift pump ok after.... when I say tightened screws they turned very little

 

[jondear]

Had similar problem with my dexta
Tightened small screws on top of lift pump ok after.... when I say tightened screws they turned very little

Tool off lift pump and going to replace as doesn't seem to do a lot when pumped .A new one is only £20 .The screws around the middle didn't seem very tight !So that maybe it !