TM 10-4610-241-24
TO 40W4-13-42
2-45. 3-WAY BALL VALVE (BACKWASH) REPAIR (Models WPES-10, WPES-20 and WPES-30) -
continued.
b.
Disassembly.
(1) Clamp 3-way valve in vise and unscrew and remove gland (27).
(2) Using vise grip or pliers on nut (1) pull out stem (28). Remove packing (30) and ring (29) from stem (28).
(3) If required, pull out stop pin (31).
(4) Remove four nuts (32), lockwashers (33) and bolts (34).
(5) Remove end fittings (35 and 36), gaskets (37 and 38) and ball (39). Pry seats (40 and 41) out of end caps (35
and 36).
c.
Cleaning.
(1) Wash all components with clean water and detergent.
(2) Rinse components in clean water and dry with wiping rag.
(3) Use wire brush to clean all threaded fittings.
d.
Inspection.
(1) Inspect all threaded components for damaged threads.
(2) Inspect ball (39) and ball seats (40 and 41) for deep scratches and corrosion.
(3) Inspect body (42) for cracks and corrosion.
e.
Repair.
(1) Replace gaskets and packing.
(2) Replace damaged components.
f.
Assembly.
(1) Install ring (29) and packing (30) on stem (28) and set aside.
CAUTION
ROWPU will blow a discharge line if ball is incorrectly installed.
(2) Position ball (39) in housing (42) with one large hole pointing toward large threaded hole in housing, the other
large hole pointing to the right as illustrated and the slot pointing toward the stem (28).
(3) Position stem (28) in housing (42). Make sure it engages slot in ball (39).
(4) Install gland nut (27) and snug, then mark position of stem (28) in relation to valve body (42).
2-186 Change 1
