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DeZurik ANSI/AWWA C540 にも：取扱説明書 (9 ページ)

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ANSI/AWWA C540 Hydrualic Cylinder for G-Series Actuators

Disassembly

1. Shut off the water pressure supply to the cylinder.

2. If the actuator is powered, disconnect and lock out the pneumatic, hydraulic, or electrical power

to prevent accidental operation of the actuator.

3. Relieve pressure in the cylinder.

4. Disconnect the cylinder tubing.

5. Remove nuts and washers from the tie rods, and remove cylinder cap.

6. Rotate the cylinder tube while pulling it from the piston.

7. Remove the nut on the piston rod.

8. Remove the piston.

9. Remove extension cap from other end of gear box housing.

10. Remove nuts and spring washers from the rack rod.

11. Pull the piston rod, complete with rack rod, from the cylinder head.

12. Take out the four screws and separate the cylinder head from the actuator housing.

13. Remove the seal in the cylinder head.

Reassembly

1. Install the piston rod seal as shown in Figure 1.

a. Inspect the scraper in the isolation plate and replace if damaged.

b. Be sure vent near isolation plate is clear.

c. Clean groove in cylinder head and lubricate all parts.

d. Insert U-cup in the groove. Make sure the groove in the U-cup faces the piston end of

the cylinder head.

March 2017

(continued)

Figure 1—Piston Rod Seal Placement

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DeZURIK

D10296