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TM 5-2420-222-20-3
PRESSURE CONTROL VALVE - CONTINUED
ACTION
LOCATION
ITEM
REMARKS
INSPECTION/REPLACEMENT - CONTINUED
27.
Spring (1)
a.
Look for cracks, breaks, and abnormal
bends.
b.
Using 4 to 400-pound capacity spring
tester, measure free length.
Free length should be approximately
4.625 inches (117.475 mm).
c.
Using 4 to 400-pound capacity spring
tester and 0 to 150 foot-pound
capacity, 1/2-inch drive torque wrench,
apply 50 foot-pounds (68 N•m) torque
and measure compressed length.
Compressed
length
should
be
approximately 3.5 inches (88.9 mm).
28.
Pressure housing (2)
a.
Look for cracks and breaks.
b.
Look for grooves, pits, and deep
scratches in valve bore.
29.
All other parts
Look for cracks and breaks.
30.
All threaded parts
Look for damaged threads.
REPAIR
31.
Pressure housing (2)
If threads are damaged, using pipe thread
set, restore threads.
ASSEMBLY
CAUTION
Be careful not to damage orifice during assembly. Damaged orifice may cause pressure control
valve to operate improperly.
32.
Valve (3)
Orifice (4)
If removed, using 0.250-inch outside
diameter remover and installer and arbor
press, press in.
33.
Plug (5)
New packing (6)
Place in position.
34.
Pressure
Plug (5) with
a.
Place housing (2) in machinist's vise
housing (2)
assembled
with vise jaw caps.
packing (6)
b.
Screw in and tighten using 7/8-inch
open-end wrench.
2-1206
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