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MAN 604A Rev. 5
Maintenance
Section 5: Maintenance
5.2.1.2 Cylinder Reassembling
1. Carefully clean the inside of the tube (19) and check that the entire surface,
particularly that of the bevels, is not damaged. Lubricate the inside surface of the
tube and the bevels at the ends. Slide the tube onto the piston taking care not to
damage the piston O-ring (49) and the head ange O-ring (47).
2. Assemble the end ange by centering it on the inside diameter of the tube, taking
care not to damage the O-ring (47).
3. Assemble the washer (24) and the nuts (16) onto the tie rods (18). Tighten the
nuts to the recommended torque, alternating between opposite corners.
4. Screw the stop screw (26) into the threaded hole of the end ange until it reaches
its original position (the same protrusion with reference to the ange surface).
To make the operation easier feed the pneumatic cylinder with air (if possible) in
order to compress the spring.
5. Check that the sealing washer (50) and the washer (51) are in contact with the end
ange (22) surface.
6. Tighten the lock nut (25).
NOTICE
After maintenance operations carry out a few actuator operations (5 - 10) to check that
its movement is regular, that there is no air leakage through the seals and to to eliminate
any oil residues in the air circuit, deriving from the lubrication of the seals during the
replacement phase.
June 2020
Installation, Operation and Maintenance Manual
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