OPERATION & MAINTENANCE
4.6
2. Close the liquid process and vapor process isolation valves at the carbon dioxide
storage unit and bleed pressure from each line.
3. Remove the extrusion die cover.
4. Remove the extrusion die.
5. Remove the rod coupling.
6. Manually extend the compression cylinder piston rod until the piston exits the
end of the compression cylinder.
7. Remove the compression cylinder piston rod bearing and seal retaining ring.
8. Remove the compression cylinder piston rod bearing and bearing seal.
9. Install new rod bearing and bearing seal.
10.Replace the retaining ring.
11.Remove the wear bands from the compression cylinder piston.
12.Check the set screws in the piston to be sure they are tight (if applicable).
Note: Some models have nylon set screws over the steel set screws. If applicable,
remove the nylon set screws and check the steel set screws for tightness. Replace
the nylon set screws.
13.Install new wear bands on the compression cylinder piston.
14.Reassemble in the reverse order. Be sure to grease the rod coupling with a light
coating of grease.
Note: Be certain that the compression cylinder, compression cylinder piston, and ex-
trusion die are completely free of all moisture before reassembling. Refer to the
Torquing Procedure on page 4.12 for the proper sequence and torque values of
the die bolts and tie rod bolts.
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