After all of the valves and springs have been removed
from the valve body, soak the valve body, separator, and
transfer plates in mineral spirits for a few minutes.
Thoroughly clean all parts and make sure all passages within
the valve body are clear and free of debris. Carefully
blowdry each part individually with dry compressed air. Never
wipe the parts of a valve body with a wiping rag or paper
towel. Lint from either will collect in the valve body
passages and cause shifting problems. As the parts of the
valve body are dried, place them in a clean container.