BENDIX AD-9si

11
Figure 7 – Bendix
®
AD-9si
®
Air Dryer Serviceable Components
Gasket
Governor
Spring
Delivery
Check Valve
Body
Small
O-ring
Safety
Valve
Desiccant Cartridge
Replacement Kit
Heater
Screws
Heater &
Thermostat
Cover
O-ring
Retaining
Ring
Purge
Valve
Governor
Screws
O-ring
Washer
O-ring
O-ring
Delivery Check Valve
Replacement Kit
Purge Valve
Assembly
Governor Kit
Heater & Thermostat Replacement Kit
TEMPORARY AIR DRYER BYPASS
To temporarily bypass the air dryer, follow these procedures
and be sure to adhere to the General Safety Guidelines
outlined elsewhere in this document.
Make sure that all residual pressure has been released.
Slowly loosen the tting that connects the air compressor
discharge line to the air dryer inlet port (IN 1) thereby
allowing any pressure trapped in the air dryer purge
reservoir to escape to the atmosphere. Once the pressure
has escaped and air ow has ceased, remove the tting
that connects the air compressor discharge line to the air
dryer inlet tting. Remove the air dryer delivery port tting
(OUT 21). Using any necessary ttings, install a Tee tting
in the air dryer delivery port. To one side of the Tee tting
install the line removed from the air dryer delivery port, to
the opposite side of the Tee tting install the line removed
from the air dryer inlet port. This procedure will allow the
integral governor to continue to regulate the air brake
system pressure properly.
After testing the Tee tting for any air leakage – by using
a soap solution after charging to system cut-out pressure
(a 1 inch bubble in 10 seconds is acceptable) – the vehicle
may be returned to temporary service.