BENDIX TCH-008-023 User Manual

Technical Bulletin

Bulletin No.: PRO-08-23 Effective Date: 4/1/94 Cancels: PRO-08-23 dated 3/1/94 Page: 1 of 1

Subject: AD-4 and AD-9 Air Dryer – Desiccant Cartridge Height

Reduction

Corrected Bulletin: The labels on the cartridge illustrations below were
reversed on the original release of this bulletin. Please replace as soon as
possible.

This is to announce that the desiccant cartridge used in all new AD-4 and AD-9 Air
Dryer assemblies has been reduced in height by approximately ¾”. The height
reduction was achieved by bringing several internal cartridge components closer
together. Formerly unused air space within the cartridge housing has been eliminated
by this redesign and allowed the ¾” reduction in height. The amount of desiccant used
in the cartridge remains unchanged.

By reducing the cartridge height, an increase in usable purge volume was achieved,
along with a slight weight reduction. The old and new cartridge designs are completely
interchangeable. The part numbers for new service and re-manufactured exchange
cartridges, for both the AD-4 and AD-9, remain the same. See the chart below for
reference. All service new cartridges will be the shorter version while either design
cartridge will be supplied for re-manufactured exchange purchases.