Traction 2140 looses power when steering

[Dougal]

We have a 2140 that may be a bit tired, earlier this year it mole ploughed 40 acres, not sure if that says its fine or if that killed it...
Recently ,after harrowing 5 of 7 acres (not a borg by the way) the tractor would virtually stall when turning a corner.
More tests seem to show the problem occurs when you turn the steering wheel (left lock is worse than right) while the engine has got a bit hot (just under half way on the temp gauge). Once at full lock it picks up power again and can run round in small circles easily.

Surely the hydraulics cant sap that much power, must admit I havent tried ramming the loader against an end stop while its hot, but when cold there is no problem (the over pressure bypass must work ok)

This is more confusing than annoying since its rare we use it long enough to get hot.

 

[Dougal]

Aha (ppy birthday to toby)

Got it, now then how many guesses did we get? Did anyone even come close to air leaking into the fuel lines?

Heres how it happened...
A tiny hole in he fuel line between the tank and the lift pump lets air in but not diesel out, it gets worse as the level in the tank gets lower (thats the engine getting hot bit, coincidental with tank emptying).
The fuel filter is on the right side of the engine with line out at the top, an air bubble forms here and in straight running a percentage of air goes through to the injector pump and back to the tank as normal bypass, turning left the fuel runs away from the outlet causing a larger than normal bubble of air to hit the injector pump and thus fuel starvation and loss of power.
Holding a hard left turn empties out the air and the same percentage of air and fuel is sent to the injector pump where the bypass handles it.