TM 9-2590-506-13&P
5-19. INTERNAL
VALVE
MAINTENANCE
(a) Inspect for kinks, deformation or
INSTRUCTIONS (Continued)
permanent set.
c. Cleaning. Clean the internal valve parts as
(b) Free length shall be 7.0 0.3 inches.
(7) Valve Piston Assembly.
Inspect valve
d. Inspection.
piston assembly (17) as follows:
(1) Valve Cap. Inspect surface of valve cap
(a) Surface finish of major outside
(3) that mates with piston shaft (8), shaft
diameter shall not have any
seals (13) and tube (20) for scratches,
scratches, scoring, nicks or other
scoring, nicks or other damage.
damage.
(2) Piston Pilot Assembly.
(b) Surface of piston seal (14) shall not
5-20.d. for inspection requirements of
have any nicks, cuts, tears or
piston pilot assembly (5).
(3) Piston Shaft. Inspect surface of outside
(8) Screen Assembly.
Inspect
screen
diameter of piston shaft (8) for scratches,
assembly (18) for tears or breaks.
scoring, nicks or other damage.
(9) Tubes. Inspect tubes (19 and 20) for
(4) Valve Body. Inspect surface of valve
kinks, bends, cuts or breaks.
body (10) that mates with valve piston
assembly (17), piston seal (14) and tube
(10) Orifice Spring. Inspect orifice spring (22)
(20) for scratches, scoring, nicks or other
as follows:
damage.
(a) Inspect for kinks, deformation or
(5) Piston Seal Garter Spring. Inspect piston
permanent set.
seal garter springs (15) for kinks,
deformation or permanent set.
(b) Free length shall be 2.00 0.20
inches.
(6) Piston Spring. Inspect piston spring (16)
as follows:
e. Repair.
Repair is limited
to
replacement of defective parts.
5-33