Bendix Commercial Vehicle Systems AD-9si Oil Coalescing Air Dryer - Manual (Page 11)

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
that connects the air compressor discharge line to the air
dryer inlet fitting. Remove the air dryer delivery port fitting
(OUT 21). Using any necessary fittings, install a Tee fitting
in the air dryer delivery port. To one side of the Tee fitting
install the line removed from the air dryer delivery port, to
the opposite side of the Tee fitting 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 fitting for any air leakage — by using
a soap solution after charging to system cut-out pressure
(a 1” bubble in 10 seconds is acceptable) — the vehicle
may be returned to temporary service.
Note: This is a temporary bypass of the air dryer. Full
repair of the unit must be carried out at the earliest
opportunity. Excessive vehicle operation with the air
dryer bypassed may damage oil sensitive components
such as an automated manual transmission or the
emission system. With the air dryer removed from the
system, contaminants will be entering the air brake system.
Reservoirs will need to be manually drained daily until the
repairs are completed. At the end of each working day,
park the vehicle and slowly drain pressure through the
drain valves — leave open to the atmosphere — for several
hours, if possible. When repairs are carried out, be sure to
check that all reservoirs are emptied of all contaminants.