Keeping the World Flowing
55
16.0 Periodic Maintenance
PM-GP-007 Page: 1/9
Component: Single-Acting actuator / Double-Acting actuator Task: Hydraulic Cylinder for manual override seals replacement
Equipment, Tools, Materials:
Spare seals
Wrench
Lifting tools
Project documentation
Warnings:
Preliminary Operations: Removal from Valve
Description:
Note: the following instructions apply both to Single-Acting and Double-Acting actuator unless otherwise specified.
Cut-off power supply and electric power supply (if present) before performing any operation.
Preliminary actions
1. Verify actuator is in the fail position (single-acting) and not pressurized
2. Remove actuator from valve (par. Removal from Valve, page 11)
3. Position the actuator on a workbench (if possible) or in a stable position and in a clean and closed area
4. Remove any control equipment (if presents). Refer to the project specific documentation
5. Remove pipes
6. Remove hydraulic pipe (P)
7. Unscrew bolts (S) and remove hydraulic pump assembly (3)
S3
P
8. Remove plugs A1 and A2 to drain oil
9. Collect oil and dispose of properly
10. Hold stop nut (4) with a wrench, unscrew and remove
cap nut (1) with seal washer (2)
1
2
4A1
A2
A4 US
US
A4
US
A4
A4 US
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