Power steering care/maintenance

Just wanted to know if there are any specific maintenance jobs that I should be doing on my power steering other than changing the fluid and the belt.

I'm not sure if my model has a filter, and there is only a slight leak, in which I changed the hose from the reservoir to the pump.

I'm getting some inconsistencies with how stiff or loose the steering is and I'm wondering if there's something I'm neglecting with regards to the steering apparatus.

I currently use synthetic ATF in it as well.

Please give me your thoughts...

Thanks,

AARON ROCHARD

1976 230.4 W115