Bendix Commercial Vehicle Systems DRM DRYER RESERVOIR MODULE 3/07 - Manual

1
Air
Connection Function/Connection No.
Port ID
DESCRIPTION
The function of the dryer reservoir module (DRM ™ ) is to
provide heavy vehicles with an integrated vehicle air dryer,
secondary reservoir, purge reservoir, governor and a number
of the charging valve components in a module. The DRM
™
dryer module model covered in this Service Data Sheet is
the first to be released, see updates to this Service Data
Sheet for other models.
The DRM ™ dryer module includes an integrated solution air
dryer (AD-IS ® ), a reservoir (including a separate purge
reservoir section) a governor and four pressure protection
valves. These have been designed as an integrated air supply
system.
The function of the AD-IS ® air dryer is to collect and remove
air system contaminants in solid, liquid and vapor form
before they enter the brake system. It provides clean, dry
air to the components of the brake system which increases
the life of the system and reduces maintenance costs. Daily
manual draining of the reservoirs is eliminated.
The function of the pressure protection valves is to both
control the order in which the components receive air from
the AD-IS
® air dryer, and also to protect each reservoir from
a pressure loss in the other reservoir or a pressure loss in
an air accessory.
FIGURE 1 - DRYER RESERVOIR MODULE
The air dryer consists of a “spin on” desiccant cartridge
secured to a base assembly.
The base assembly contains a delivery check valve
assembly, safety valve, heater and thermostat assembly,
pressure protection valves, threaded air connections and
the purge valve assembly.
Bendix ® Dryer Reservoir Module with AD-IS ® Air Dryer
SD-98-9808
1
IN
21
PRI
22
AUX 1
23
AUX 2
UNL Unloader Control Air (D-2A ™ Governor) 2
RES Common Reservoir Pressure (D-2A ™ Governor) 2
EXH Governor Exhaust 1
TABLE 1 - DRM ™ DRYER MODULE AIR CONNECTIONS
Inlet Port (air in). 1
Delivery Port out (to Primary reservoir) 1
Auxiliary Delivery Port (air out). 4
Auxiliary Delivery Port (air out). 1
DESICCANT
CARTRIDGE
SECONDARY
RESERVOIR
AD-IS ®
Air Dryer
INTEGRATED
PURGE RESERVOIR
GOVERNOR
PRESSURE PROTECTION
VALVES (4)
AUXILIARY
DELIVERY PORTS
(5)
HEATER/
THERMOSTAT
SAFETY VALVE
AD-IS ® AIR DRYER PART NUMBER STAMPED HERE
MOUNTING
BOLTS (3)