Stearing problems!! (Defender 110 2006)

I have a problem no one seems to solve, for about 3 years my power steering box makes noise when I reach full left or right. A few mechanic looked into it but no one seems to solve the problem and they say its becuase the pump is full when I reach the full left or right (sounds to me like bool). the problem started after I took my vehicle for maintenance (I think they did something bad ). there are not a lot of professional mechanics where I live if any, and since then I'm taking care of my car myself and can anyone think of where to start with solving this annoying thing?

its normal to make a noise in full lock,

Really? like that out of nowhere it start to make noise? it wasn't there when I bought it... is it a matter of time?

Have you tried changing the belt?

Im going to this week, do you think its connected?

What sort of noise???

it has a sound of "squeaking tension"

It could be the drive belt. When a fan belt is loose on your alternator, the sound is very like the squeal of tyres on a road when cornering a bit fast.

The only thing you should get from steering is a slight strainning whine from the pump on full lock.

Disco's often make a groaning noise from the power steering. Its something to do with the vibration of the fluid flowing through the pipes. Don't know if it applies to Defenders. there is a service bulletin on Rave somewhere. Its not meant to be a problem.

I changing the belt tomorrow I'll see what happens...

Thank you all for the help, I changed the drive belt and its much better now, also I noticed the tensioner was a little stuck from dirt so after a few push it was released.

also not great to leave the steering on full lock for long, it boils the atf.