My 77s Power steering is not happy, its jerky and slow.
Is that the box or the pump? The fluid is full.
Is that the box or the pump? The fluid is full.
doller store turkey baster .
1 qt p/s fluid and empty jug .
engine off suck out . refill .
fire up and turn left / right 2-3x .
re rain / fill till all new fluid is used .
good basic fluid swap out.

Check the belt tension and even check the belt itself. If the belt slips then you'll get the same symptoms you have.
Got a chance to play with it yesterday...turns out the belt was a bit loose.
Got my kid to start it while I looked in the pump, nothing funny going on there, just some nasty looking oil!
seems to be working good now.