craig2105 wrote:
Is it more of a sort of groan? If so, they all seem to do that. At least the ones I've been in, anyway. Don't know about your leak though.
Pressure relief valves groan, can sometimes be reduced or eliminated by draining & refilling with fresh oil.
The squealing could be the belt slipping, quite common as the oil filter & cooler is just above it & any drips fall on the belt. The leak from the steering could be a union weeping which they all do. Worth a check around the pipework though as it is steel & does corrode. If it dumps its fluid then the pump seizes & you lose all the assistance.