Cleaning

1. Thoroughly clean all parts, except check balls, in clean solvent and blow dry with moisture-free compressed air.
2. Inspect all valve and plug bores for scores. Check all fluid passages for obstructions. Inspect all mating surfaces for burrs and scores. Do not stone or polish any valves or bores. If valve(s) do not move freely, the main control valve body must be replaced as an assembly.
3. Inspect all springs for distortion.
4. Check all valves and plugs for free movement in their respective bores. Valves and plugs, when dry, must fall from their own weight from their respective bores.
5. Roll manual valve on a flat surface to check for out-of-round condition.