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c. If o-ring seal (2) and dowel tube (13) remain in
the handle (l2) or cylinder (47) recess, remove
them and discard the seal only if a replacement
is available. If a replacement is not available
and the old seal is worn, cut or otherwise
damaged, it may result in air leakage from
between handle and cylinder but must be reused
until a replacement becomes available.
d. Unscrew trigger valve plug (5) and remove o-ring
seals (6) from grooves in the trigger valve plug.
Discard the seals only
available. If replacements are not available and
the old seals are worn, cut or otherwise damaged,
they may result in air leakage from between the
trigger valve plug and handle (12) but must be
reused until replacements become available.
e. Press a small diameter rod into the hole in the
front of handle (12) and carefully push trigger
valve plunger (8) with attached trigger link (11)
and trigger spring (9) out the back of the handle.
If triggering of the Pakhammer was proper (very
slight trigger pull with no release of air), do not
disassemble the trigger valve plunger from the
trigger link. If triggering was improper, measure
and mark down the distance between the front of
trigger link and the rear of trigger valve plunger
to assure they are properly adjusted during
reassembly. The dimension should be 5.120"
(130 mm), but may vary slightly ±1/16" (1.6 mm).
If it is necessary to unscrew the trigger link from
the trigger valve plunger, first heat the joint with a
heat gun (not a torch) to soften the thread
sealant.
f.
Remove trigger spring (9) and o-ring seals (7 and
10). Discard the seals only if replacements are
available. If replacements are not available and the
old seals are worn, cut or otherwise damaged, the
front seal may result in air leakage from around the
trigger lever (4) but must be reused until a
replacement becomes available. If the rear seal (7)
is worn, cut or otherwise damaged, Pakhammer
operation
may
occur
Pakhammer. Inspect the trigger valve plunger for
scoring, excessive wear and distortion that may
result in erratic triggering operation. Check that the
trigger link is not bent or the threads damaged.
Inspect internal threads in handle (12) for damage
such as battered, stripped or cross threads. Minor
thread damage can be corrected with a threading
tap.
6‐46 ‐466 6666 6666
if replacements are
without
triggering
6-4.4
REMOVAL
SHUTTLE VALVE ASSEMBLY.
A thread sealant has been applied to all fasteners
necessitating the use of hexagon socket keys that are
not worn and the application of significant force for
their removal,
a. Remove screw (22) and lock washer (23)
securing D handle (24) to valve cover (26);
remove D handle.
Springs (40) are compressed within cylinder (47) and
upon removal of all four screws (25) may project the
shuttle valve assembly (27 through 32) and/or piston
assembly (33 through 36) rearward with significant
force to injure personnel.
b. Slit label (50) between valve body (31) and cylinder
(47). NOTE: CUT OR DAMAGED LABELS VOID
ONE YEAR MANUFACTURER WARRANTY,
PAGE 7-4. Unscrew three of four screws (25)
securing valve cover (26) to the valve body. While
holding the valve body firmly against the cylinder,
remove remaining screw (25) and slowly back off
the valve body until the compressive spring force
is released. Remove o-ring seal (27). Discard
the seal only if a replacement is available. If
a replacement is not available and the old seal
is worn, cut or otherwise damaged it may result
in air leakage from between the valve cover and
valve body with a slight loss of power but must
be reused until a replacement becomes
available.
c. Press push rod (28) out of valve body (31). Pull
u-cup seal (29) and backup washer (30) out of
the valve body recess. Note orientation of the
u-cup seal and its location relative to the backup
washer to facilitate their proper assembly.
the
Discard the seal only if a replacement is
available. If a replacement is not available and
the old seal is worn, cut or otherwise damaged it
may result in air leakage but must be reused until
a replacement becomes available. If the seal is
sufficiently damaged, it may cause improper
shuttling and erratic or lack of operation.
d. Setscrew (32) should not be removed from the
valve body (1) unless air leakage is noted from
around the setscrew.
AND
DISASSEMBLY
NOTE
WARNING
OF
6-3
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