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Remove the mounting bracket and actuator.
Drill or center punch the starting holes for the mounting
bracket screws (or use no. 10 self-tapping sheet metal
screws).
Place the actuator and mounting bracket back into
position over the damper shaft and install the mounting
bracket screws.
Tighten the two 8 mm x 12 mm long set screws firmly
against the damper shaft (maximum tightening torque is
100 lb-in.).
Fig. 2. Installing mounting bracket on ML9185 Direct
Coupled Actuator.
2
ML9185 SPRING RETURN DIRECT COUPLED ROTARY ACTUATOR
Installing Actuator for Three-Point Mounting
The ML9185 Direct Coupled Actuator is designed with
removable hub sleeves to accommodate specific damper
shaft sizes. Proper sleeve selection is necessary when three-
point mounting is used to avoid excessive strain on the output
gear. Most ML9185 Actuators are shipped with a 1/2 in. hub
sleeve. For field use, several hub sleeve sizes are available.
See the Accessories listing in the Specifications section.
Shaft sizes are stamped on the sleeves.
The ML9185 Direct Coupled Actuator can be mounted directly
on the motor shaft with the actuator in any position if the
actuator housing is parallel with the damper housing or frame.
(See Fig. 7.)
The ML9185 Direct Coupled Actuator has a reversible output
hub. The hub is factory mounted on the top of the actuator
gear housing. When attaching to damper shafts less than
3.5 in. (76 mm) long, or for ease of mounting, the output hub
can be mounted to the inside of the actuator gear housing.
See Fig. 3. Be careful when removing the retaining ring that
secures the output hub to the actuator housing. Use a
flatheaded screwdriver to loosen the ring.
Other possible mounting configurations and standard
connections are shown in Fig. 4 through 7.
M9386
6
3
6 0
3 0
9 0
6 0
3 0
0
Fig. 3. Mounting hub to inside of actuator.
5
1
DETENT
INSERT
4
INDICATOR
DETENTS
5
M7228
63-2494—1
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