1
®
Bendix
®
AD-9si
®
& AD-9si
®
PuraGuard
®
Oil Coalescing Air Dryer
Desiccant
Cartridge
(PuraGuard
®
Oil
Coalescing Shown)
IN 1
Supply From
Compressor
Heater /
Thermostat
Safety Valve
Mounting
Holes
(3 Per Side)
PT 22
Extended
Purge Port
OUT 21
Delivery Ports (2)
SD-08-2433
Purge
Valve
CON 2-4
Unloader To
Compressor
Figure 1 – Bendix
®
AD-9si
®
& AD-9si
®
PuraGuard
®
Oil Coalescing Air Dryer
Governor
(Governor Cut-Out
Pressure Stamped
On Cover)
Delivery
Check Valve
Cover
3
Governor
Exhaust
Bottom
View
Purge
Valve
OUT 21
Delivery Ports (2)
OE and Service New Bendix
®
AD-9si
®
& AD-9si
®
PG air dryers
manufactured after April 2016,
contain two parallel ribs on the
side of each port as shown
here. These ribs identify the
air dryer and/or end cover as a
genuine Bendix
®
product. If the
OE or Service New air dryer or
end cover being serviced was
manufactured after this date and
does not contain these ribs, it is
not a genuine Bendix product.