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M6 SERIES IOM
6th EDITION
ISSUED 12/2014
21
VIII.
Actuator Assembly
A. Steps to Actuator Assembly
The directions below assume the actuator has been disassembled. Please refer to pg. 21 if this process has not been
completed.
1. Inspect all wear surfaces for excessive wear or possible damage.
2. Install all bearings and o-rings as follows (Contromatics recommends if an actuator has been in service to
replace all seals and guides. Please refer to pg.25 for available kits):
a. Pinion: Install lower pinion bearing and lower pinion o-ring. (Fig. 9.1)
b. Pistons: On each piston install the bearing, o-ring, and skate. (Fig. 9.2)
c. Body: Insert the thrust bearing into the top pinion hole as shown. (Fig 9.3)
Fig. 9.1
Fig. 9.2
Fig. 9.3
3. Using the correct grease, (consult your Contromatics representative for your specific temperature application)
lubricate the inside of the cylinder, all o-rings, piston skates, piston and pinion guides. The teeth of the racks and
pinion should be greased so that the grooves between teeth are roughly half filled with grease while all
previously mentioned surfaces should be lightly coated.
4. Slide the top half of the pinion into the bottom of the actuator, orient the cam on top of the pinion according to
desired operating direction (see Fig 9.4 and 9.5 below) then slide the pinion the rest of the way through the body
until it stops. (see pg.11 for more information about possible configurations).
Fig. 9.4
Fig. 9.5
Both illustrations above show standard orientation of the cam/pinion at the actuator fail position (the pinion cam has been
colored blue for contrast). In fig. 9.4 the cam configuration shown is intended for fail closed applications. In Fig. 9.5 the
configuration shown is intended for fail open applications. It is important to note that the above cutaway view assumes that the
stops and air ports of the actuator are facing the viewer. Once installed, look down the bore of the actuator and ensure that the
cam is aligned properly with both the top of the pinion and the pinion
drive in both the closed and open positions.