Wiper Blades
Check the condition of the wiper blades at least every six months.
Replace them if you find signs of cracking in the rubber, areas that are getting
hard, or if they leave streaks and unwiped areas ...
Indicators
...
Regulator Valve Body Disassembly, Inspection, and Reassembly (A/T)
Clean all parts thoroughly in solvent, and dry them with compressed air.
Blow out all passages except the air check valve filter.
Inspect the regulator valve body for scoring and ...