Changing Rotation Direction - Fisher D500243X012 Instruction Manual

Rack-and-pinion rotary actuator

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Table of Contents

Instruction Manual

Form 5417

February 2007

construction does not use the

adjustment screw, install the drive

shaft, and go to step 6 below.

5. Note the alignment of the cam with respect to the

housing adjustment screw while installing the shaft

into the body. Install the drive shaft.

6. Install the washer, thrust washer, and spring clip

(keys 27, 21 and 35) onto the drive shaft. Use the

pin spanner carefully to install the spring clip.

7. Go to the Installing Pistons steps below.

P Series Actuators (without a Type 1080) use a

Limit Stop Plate (see figure 4) for travel stops. The

cam for the travel stops is mounted on the actuator

after the actuator is fully assembled.

1. Replace the top and bottom shaft bearings in the

actuator body. Install the O-ring and guide bushing

in the shaft. The guide bushing may have to be

cleaned of grease, rolled tightly around the drive

shaft and held in place while inserting into the

actuator housing.

2. Insert the small end of the drive shaft (key 5) into

the bottom of the actuator housing.

3. Install the thrust washer, and spring clip (keys 21

and 20) onto the drive shaft. Use the pin spanner

carefully to install the spring clip.

Installing Pistons

Figure 7 shows the alignment of the slot in the top of

the shaft with the pistons for code A constructions.

See figure 3 for piston and slot alignment for other

constructions.

1. Install the O-ring and guide bushing on both

pistons. For P Series actuators: you will need to

install the gear racks on the pistons if they were

removed.

2. Lightly lubricate parts and inside of actuator bore

before final assembly.

3. If you have not already done so, follow the steps

in the Installing the Drive Shaft section.

4. Very carefully align the pistons square to the

actuator housing.

1035/El-O-Matic Actuator

5. Align the drive shaft so that the teeth on the

center gear will "pick-up" the piston assembly rack

teeth when turning the top extension of the center

gear clockwise.

To ensure proper meshing of teeth, rotate the index

mark on the drive shaft 45 degrees beyond the open

mark on the top of the housing.

Figure 3 shows the different

orientation of the piston in relationship

to the slot in the shaft, versus the

actuator body.

6. With the piston assemblies in the actuator body,

gently push them simultaneously into the housing.

Turn the top shaft extension clockwise. At the proper

point of engagement between the center gear and

piston assemblies, both piston assemblies will move

toward the center of the housing.

7. Once the drive shaft and pistons are properly

engaged, ensure smooth movement at 90 degree

operation can occur without moving the pistons out

of the actuator body. Do this by turning the top shaft

extension to the closed position and back a few

times.

8. If not already done, replace the washer over the

top shaft extension. Install the spring clip onto the

mating groove on the top shaft extension with a pin

spanner.

9. Replace the actuator end caps taking care to

properly seal them with O-rings. Use the metric hex

keys to replace the socket head screws.

10. The adjustment screw and nut, if applicable,

should now be set to stop travel at the desired

position.