A/C Compressor Shaft Seal - Usage
Number: 84-83Section: 1A (Ia)
Date: Oct., 1984
Subject: A/C COMPRESSOR SHAFT SEAL USAGE
Model and Year: 1983-84 ALL PASSENGER VEHICLES
TO: ALL CHEVROLET DEALERS
This cancels and replaces Chevrolet Dealer Service Bulletin 84-83 dated March, 1984 which should be destroyed.
A new A/C compressor shaft seal has been implemented on all R-4 and DA-6 A/C compressors during the 1984 model year. A new one-piece lip seal has replaced the two-piece ceramic carbon seal. The lip seal is a quality improvement and is anticipated to improve shaft seal field performance. Inspection and shaft seal service must be made as follows:
^ DA-6 compressor originally produced with two-piece ceramic carbon seal must be serviced with a two-piece seal (P/N 2724280).
^ DA-6 compressors produced with the one-piece lip seal must be serviced with a one-piece seal (P/N 2724319).
^ R-4 compressors originally produced with the two-piece ceramic carbon seal must be serviced with a two-piece seal (P/N 12301828) for proper shaft seal function.
^ R-4 compressors originally produced with the one-piece lip seal may be serviced with either a one-piece seal (P/N 2724319) or the two-piece seal (P/N 12301828).