Installing Cylinder
1. Scrape the old gasket material from the actuator housing and cylinder head, and then place a
new gasket on the cylinder head.
2. Install the cylinder/rack rod assembly by sliding the rack rod through the rack; then fasten the
cylinder to the housing.
Note: The cylinder mounting flange on the actuator housing is stamped with the letter "P."
If the rack rod is not attached to the cylinder, clean the threads of both the rack rod and
the cylinder shaft, then apply Loctite to the cylinder shaft threads, and screw the rack rod
onto the cylinder shaft until tight.
3. Screw one nut onto the rack rod until it is tight against the rack.
4. Screw the other nut onto the rack rod and tighten the two nuts against one another.
5. Install the extension cap onto the actuator housing.
6. Connect the supply pressure tubing to the cylinder.
7. Turn on the supply air to the cylinder.
8. Check the actuator stop settings and readjust if necessary. The correct adjustment procedure is
described in the STOP ADJUSTMENT Section of this Instruction.
9. Pipeline flow may now be restored.
Disassembling Actuator
1. Discontinue flow and relieve pipeline pressure.
Accidental operation of power actuator can cause personal injury or equipment damage.
Disconnect and lock out power to actuator before servicing.
2. Apply air pressure to the port in the cylinder cap (the end farthest from the actuator housing)
until the valve has moved to the end of its stroke.
3. Disconnect and lock out the pneumatic, hydraulic, or electrical power to prevent accidental
operation of the actuator.
4. Scribe corresponding lines on the valve and actuator to help align them during installation.
5. Note the position of the pointer, and then remove the pointer screws and pointer.
6. Scribe corresponding lines on the actuator cover and housing, then remove the cover screws
and cover from the top of the actuator.
Note: It may be necessary to drive a chisel between the cover and actuator housing to loosen
the cover.
October 2012
Cylinder Operated G-Series Actuator
Page 7
DeZURIK
D10082
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