APPENDIX B : COMPRESSOR DRIVEN AIRDRYER
20950 Issue 1 April 98 B--17
4000 HOUR MAINTENANCE
The4000 hourservice isasthe2000 hourservice plusthefollowingprocedure.
Compressor Piston Seal and Valve Replacement
WARNING: The airdryer must be switched off and power
removed.
Note: The 4000 hour service kit is part number 30470.
Compressor
Compressor
Mounting
Screws
Removing the Compressor
AD008--2
Connectors
(1) Remove the wiring to the compressor.
(2) Disconnect the tube connected to the compressor head.
(3) Remove thescrewssecuringthecompressorfancoverandremove
the cover.
(4) Release the screws securing the compressor and remove the
compressor from the cabinet.
(5) Unscrew and remove the compressor filter.
(6) Note the orientation of the compressor head relative to the
compressorbody, then releasethe screwssecuring the compressor
head and remove the head and valve plates as a single assembly.
(7) Remove the ’O’ ring from the cylinder sleeve.
(8) Onthecompressor,removethescrewatthecenterofthepistonand
remove the retainer plate from the piston.
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