Power steering?
My dad once had an applicant for a dumper driver vacancy at the quarry.
He was a very small slightly-built chap who claimed he had driven the very same AEC Matadors in the army.
He was sent off for a trial round with Terry the fitter riding shotgun.
The run empty to the dragline at the face wasn't too bad, but once fully freighted the front wheels would track the 12" deep ruts all the way to the plant.
This chap was determined to show he was in control so held on to the steering wheel like superglue.
At one point descending a long steep incline Terry said he left the seat completely and he was wrapped 1/2 way round the front screen before the wheels lowered him back gently......
I was too young to drive at the time but years later after hey'd all been scrapped I acquired a lovely example.
And after its first run I replaced the steering box with one from an eight-wheeler - you could almost steer it with one hand!
One old girl I really did regret letting go....