Replacement of powercage gaskets, Removal of old gasket material, Powercage gasket (cont.) – Rockwell Automation 7000A PowerFlex Medium Voltage AC Drive - Air-Cooled (A Frame) User Manual
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Component Definition and Maintenance
7000A-RM001A-EN-P – January 2011
7000 “A” Frame
PowerCage Gasket (cont.)
Replacement of PowerCage Gaskets
The gaskets do not normally require replacement, but in the event that
they become damaged, they may require replacement.
Removal of old Gasket Material
Pull all the material possible off by hand. Scrape off as much material as
possible with a sharp knife. Do not score the PowerCage with the knife.
All the material will not come off! Remove as much as possible to leave
an even surface to bond to. Clean away any loose pieces of gasket. Then
proceed with installation of the gasket.
The PowerCage must be cleaned with Spray Nine (another all purpose
household cleaner could be used). Do not spray onto the PowerCage as it
promotes electrical tracking. Apply the cleaner to a paper towel and wipe
the surface of the PowerCage where the gasket will be applied. Liberally
spray the surface with distilled water. Wipe the surface with a clean paper
towel.
Apply a thin bead of Loctite 454 adhesive to the PowerCage surface in a
zigzag pattern using the original nozzle size. Use the tip to spread the
adhesive around to cover at least 50% of the area. There should be
sufficient quantity of adhesive to remain wet long enough for the gasket to
be applied. The adhesive uses the moisture in the air as it cures. The
higher the humidity the faster the adhesive will cure.
I M P O R T A N T
I M P O R T A N T
This adhesive will bond anything quickly,
including fingers!
Position the gaskets ensuring the gasket is oriented correctly. The gasket
should be centered over the opening for the heatsinks with the narrow end
positioned closest to the test points. The porous surface of the gasket
should be applied to the PowerCage. The gasket will bond almost
immediately. Apply some pressure to the gasket for 15-30 seconds.
After all the gaskets have been placed check to see that the gasket has
bonded properly. Repair any loose areas.