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TM 55-1905-222-14
6-7
REPAIR RAMP HOIST CONTROL VALVE (Continued).
CLEANING
INSPECT RAMP HOIST CONTROL
VALVE
WARNING
Dry cleaning solvent, P-D-680, used to clean parts, is potentially dangerous to personnel
and property. Avoid repeated or prolonged skin contact. Do not use near open flame or
excessive heat. Flash point of solvent is 1000 138F (38 59C).
-
a. Clean control valve parts. In mineral oil solvent,
and place on a clean surface.
b. Clean control lever parts In cleaning solvent
Federal Specification P-D- 680, and dry
thoroughly.
INSPECTION
INSPECT CONTROL VALVE PARTS
a. Inspect springs for loss of tension or distortion.
b. Inspect spool for nicks, burrs, or scores.
c. Inspect threaded parts for thread damage.
d. Inspect end caps and plates for burrs, nicks,
or other damage.
e. Inspect sealing surfacesof valve bodies, and
sections for scores, burrs, or warpage.
f
Inspect poppets for burrs or nicks.
g
Replace packings.
h
Replace all defective threaded parts.
6-27


 


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