RM – 26-10-7707 Rev.
E
Page
20
of
39
n) Head Dowels and Bolts Installation:
i) Flip Actuator up such that it is setting on the mounting feet.
ii) Install four (4) head dowels:
(1) Head dowels are to be a slight press fit.
DO NOT
ream
or enlarge dowel holes in actuator to make dowel
installation easier. Doing so will void warranty and result
in poor actuator performance and likely failure.
(2) It is recommended that the dowel pins be frozen to
negative 67°C to ease installation.
(a) Alternatively, the dowel holes can be lubricated with oil.
(3) Place one dowel into dowel hole with the slight
chamfered end being put into hole and the large
radiused / curved end outward.
(4) While actuator is laying securely on the side face of the
head, NOT the shaft, use a hand sledgehammer to
pound dowel down into the hole.
(5) Use an air hammer with a round pointed end to finish
driving dowel down into the hole such that the dowel is
equal distance from protrusion of the head on both
sides.
(6) Repeat for the remaining three (3) dowels.
iii) Install remainder of head bolts:
(1) It is recommended
NOT
to reuse head bolts.
(2) Apply medium strength thread locker to the ends of twelve (12) of the ½-13 x 1.75”
long head bolts and tighten each bolt snugly.
(3) Repeat thread lock application and installing head bolts on opposite side of the
actuator.
(4) Use torque wrench and top torque ALL head bolts on BOTH sides of the actuator to
torque specified in the Torques chart located in
SECTION 7.
iv) Install four (4) Head Plugs:
(1) NOTE: Older actuators will not have these plugs
(2) Two (2) plugs per side into the head. Tighten until snug,
do
NOT
overtighten.
o) Pressure Relief Cartridge:
i) Refer to the parts listing on the Exploded Views for part
numbers
