Installation, Commissioning and Maintenance
Manual
36
PM-GP-005a
Page: 1/1
Component:
Hydraulic manual override for single-acting actuator
Task:
Hydraulic oil replacement
Equipment, Tools, Materials:
Project documentation
Wrench
Warnings:
Preliminary Operations:
Description:
Tasks must be executed with the tank in vertical position and with the actuator in fail position.
Verify the absence of pneumatic pressure.
Correct oil level is approximately 25 mm (1") below the fill/breather port.
Drain procedure
1. Remove breather/plug (1.5)
2. Place containers under drain port (D1) and (A2) to collect
the fluid
3. Remove plugs (D1), (A1) and (A2)
4. Discharge oil
5. Tighten plug (D1) and (A2) back in its seat with a wrench
6. Hand tighten plug (A1) and unfasten 1 turn
Used hydraulic fluid must be disposed of safely.
D1
A2
Filling procedure
7. Fill with oil from the fill /breather port (1.5) up to 25 mm (1")
below the port
8. Close stop valve (1.2) and verify that stop valve (3) is open
9. Install the pump lever and operate pump (1.1) until oil is bled
from port A1
10. Tighten plug (A1) with a wrench
11. Continue operating the pump to fully compress the spring
12. Ensure the oil level in the tank does not drop below the
intake tube
13. Keep the cylinder pressurized from 3 to 5 minutes, to settle the
oil level
14. Slowly open stop valve (1.2) to allow the actuator the return
to the fail position
15. Repeat the pump operation procedure from 2 to 3 times
16. Check the oil level. If necessary, fill in from the fill /breather
port (1.5) up to 25 mm (1") below the port
Important: Do not exceed this fluid level.
17. Reinstall the tank breather (1.5) and return the lever to the
storage holder
A1
1.2
1.1
3 1.5
16.0 Periodic Maintenance
A4
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A4
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A4
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A4
