Rotary Valve: Inspection

Wash all parts in solvent and blow dry. Check for leaks between stub shaft and torsion bar. Check for nicks and scores on stub shaft. Sand down with Crocus cloth if possible. Check notch valve body skirt for wear.
Check spool valve fit in valve body. With "O" ring removed, lubricate spool valve with power steering fluid. Rotate spool valve in valve body. If valve does not rotate freely, replace complete valve.
Valve assembly is balanced during assembly. If replacing any parts other than rings or seals, replace complete assembly.