RM – 26-10-7707 Rev.
E
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iv) A clean disassembly helps to identify that any material found inside the actuator is a result
of wear, system contamination or damage. Ultimately, a more accurate evaluation of the
actuator and operating system will be obtained.
c) Mark parts:
i) Before disassembly, the body, heads, and shaft should be marked in such a way as to aid
in reassembly to return parts to their relative positions to avoid installing the shaft
backwards.
d) Shaft:
i) Remove all burrs and dings from all
exposed shaft edges, around key-
seats and end chamfers on both
ends of the shaft.
ii) Any raised ‘dings’ or burrs
MUST
be
addressed otherwise damage will
occur to the seals, seal glands and
the bearings as the shaft is removed
and reinserted.
e) Manifold Removal:
i) Remove six (6) SHCS bolts.
ii) Remove two (2) O-rings.
(1) Inspect O-rings for any damage.
(2) Clean O-rings.
iii) Remove cartridge only if necessary.
f) Head Removal:
i)
DO NOT PRY HEADS OFF!!!
(1) Damage will occur to body or heads if you attempt to insert a pry tool between the
head and body to pry heads off.
ii) Remove assembly screws / head bolts from both heads.
(a) Removing material ‘smeared’ over the head bolts from high impact damage may be
required to access and remove bolts.
iii) Recommend removing head dowels.
(1) An air hammer is recommended
to drive out head
dowels.
iv) Insert ½-13 screws (Jack Screws) into the two tapped
holes
v) NOTE: a plastic set screw/plug may need removed.
vi) Tighten each “Jack Screw” evenly and in an alternating
fashion so as to separate heads from body by evenly
raising the head off the body by using these two
screws as ‘jacks’.
vii) Alternate Method:
(1) Remove all Head Bolts AND four (4) long Head Dowels.
