8 Actuators — AJSand AKSseries
8.1 Maintaining a manual actuator
(a) MNXX AJS series
Step 1: Remove the actuator and diaphragm assembly from the valve
Step 2: Remove the diaphragm
Follow the instructions for "Remove the diaphragm" on page14.
Step 3: Disassemble the actuator and replace O-rings and washers
Sleeve
Guide bushing
Key sleeve
Bearing race set
Shaft
Key
Set screw
Manual nut
Bearing race set
Snap ring
Manual knob
O-ring
1. Using a 1/8" hex key, remove the set screw on the handle.
2. Pull the knob off the sleeve.
3. Using an O-ring tool, take out the O-ring from the centre of the knob.
4. Replace the old O-ring with a new O-ring from the kit.
5. Put some of the lubricant (provided in the kit) on the O-ring.
6. Using a pair of pliers, pull the JM wiper out of the knob.
7. Replace with the new JM wiper.
8. Remove the snap ring from the top of the sleeve.
9. Grab the shaft and nut and pull them out of the sleeve. (One bearing race will come
out with these parts.)
10. Using an O-ring tool or a pick, remove the bearing left in the sleeve.
m-radialdiaphragmvalve-en-02 19
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