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 TM 9-2520-27-34
NOTE
Top helical seat may be found either in priority
valve cover or on spring.
3. REMOVE PRIORITY VALVE PISTON (1).
a. Remove top helical seat (2), spring (3),
and bottom helical seat (4).
b. Using retaining-ring pliers, remove
piston (1).
4 . CHECK PISTON (1).
5. CHECK SPRING (3).
a. Using micrometer caliper set, measure
a. Using indicator caliper, measure free
outside diameter of piston (1).
length of spring (3). Replace spring
b. Replace piston (1) if measurement is
if free length is less than 5.77 inches
less than 1.4965 inches (38.011 mm).
(146.6 mm).
4-62
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