Massey ferguson 7480

[Enutt]

It loses power if at revs over 15 for a period of time eg on mowers or pumping. If I switch it off and on again it works fine for a short time and then loses power again. Any ideas what could be wrong

 

[davidroberts30]

t2 or t3?
any codes?

 

[Enutt]

t2 or t3?
any codes?

T3
Code E157

 

[davidroberts30]

E157 is a rail pressure fault

 

[davidroberts30]

How many hours tractor done?

 

[norse]

Could be the spring broken in fuel rail pressure relief valve, I had a 7495 that did this ,there was a thread on here a few years ago about it , new valve cured mine.

 

[davidroberts30]

Could be the spring broken in fuel rail pressure relief valve, I had a 7495 that did this ,there was a thread on here a few years ago about it , new valve cured mine.

That was a sisu mind

 

[cousinjack]

Are you sure your filters are clean and free from water ? That’s where I’d start …

 

[norse]

https://www.qtponline.com/products/rail-pressure-relief-valve-massey-ferguson-56-57-5s-67-47-series-new-holland-t4-case-farmhall-quantum-series-67535.html

Similar to this

 

[norse]

That was a sisu mind

It is the same on most bosch common rail systems, I think it is the same valve on Peugeot and vw etc

 

[davidroberts30]

Are you sure your filters are clean and free from water ? That’s where I’d start …

Personally I think the metering valve is playing up
Pump off job

 

[Spud]

Peel the conduit back on the wiring going to the pump. The conduit is ridged, which wears the wires when hours get somewhere north of 7000hrs. Think we've re loomed 3 tractors for this reason now, it cured all of them. Hundreds not thousands to fix. If it runs fine when its running its unlikely to be the pump