Clean all parts thoroughly in clean solvent, and blow dry with
moisture-free compressed air.
Inspect all valve and plug bores for scores. Check all fluid passages for
obstructions. Inspect the check valves for free movement. Inspect all mating
surfaces for burrs or distortion. Inspect all plugs and valves for burrs and
scores. If needed, use crocus cloth to polish valves and plugs.
Avoid rounding the sharp edges of the valves and plugs with the cloth.
Inspect all springs for distortion. Check all valves and plugs for free
movement in their respective bores. Valves and plugs, when dry, must fall from
their own weight in their respective bores.
Roll the manual valve on a flat surface to check for bent condition.