Bendix® GSAT® (Global Scalable Air Treatment) Core Module Replacement Kits
for Volvo® Trucks
KIT COMPONENTS
See Figure 1. The following components are in the Bendix®
GSAT® (Global Scalable Air Treatment) core module kits
for Volvo® trucks:
Item No.

Component

Quantity

1

Core Module 2X EPB for
Attached Air Dryer Variant

1

2

Seal

1

Bendix Volvo Kit Part Number: K202682K57
Volvo Kit Part Number: 24865982
Bendix Mack® Kit Part Number: K202683K57
Mack Kit Part Number: 24865984
Item No.

Component

Quantity

3

Core Module 2X EPB for
Detached Air Dryer Variant

1

Bendix Volvo Kit Part Number: K273506SC
Bendix Mack Kit Part Number: K273508SC
Item No.

Component

Quantity

4

Core Module 2X EPB CFL for
Detached Air Dryer Variant

1

Bendix Volvo Kit Part Number: K273509SC
Bendix Mack Kit Part Number: K273510SC
Item No.

Component

Quantity

5

Core Module 1X EPB for
Attached Air Dryer Variant

1

6

Seal

1

Bendix Volvo Kit Part Number: K202680K57
Volvo Kit Part Number: 24865981
Bendix Mack Kit Part Number: K202681K57
Mack Kit Part Number: 24865983
Item No.

Component

Quantity

7

Core Module 1X EPB for
Detached Air Dryer Variant

1

Bendix Volvo Kit Part Number: K273511SC
Bendix Mack Kit Part Number: K273512SC

1

GENERAL SAFETY GUIDELINES

WARNING! PLEASE READ AND
FOLLOW THESE INSTRUCTIONS
TO AVOID PERSONAL INJURY OR DEATH:

When working on or around a vehicle, the following
guidelines should be observed AT ALL TIMES:
▲Park the vehicle on a level surface, apply the parking
brakes and always block the wheels. Always wear personal
protection equipment.
▲Stop the engine and remove the ignition key when working
under or around the vehicle. When working in the engine
compartment, the engine should be shut off and the ignition
key should be removed. Where circumstances require that
the engine be in operation, EXTREME CAUTION should be
used to prevent personal injury resulting from contact with
moving, rotating, leaking, heated or electrically-charged
components.
▲Do not attempt to install, remove, disassemble or
assemble a component until you have read, and thoroughly
understand, the recommended procedures. Use only the
proper tools and observe all precautions pertaining to use
of those tools.
▲If the work is being performed on the vehicle’s air brake
system, or any auxiliary pressurized air systems, make
certain to drain the air pressure from all reservoirs before
beginning ANY work on the vehicle. If the vehicle is
equipped with a Bendix® AD-IS® air dryer system, a Bendix®
DRM™ dryer reservoir module, a Bendix ® AD-9si ®, AD-HF®,
or AD-HFi ® air dryer, be sure to drain the purge reservoir.
▲Following the vehicle manufacturer’s recommended
procedures, deactivate the electrical system in a manner
that safely removes all electrical power from the vehicle.
▲Never exceed manufacturer’s recommended pressures.
▲Never connect or disconnect a hose or line containing
pressure; it may whip and/or cause hazardous airborne
dust and dirt particles. Wear eye protection. Slowly open
connections with care, and verify that no pressure is
present. Never remove a component or plug unless you are
certain all system pressure has been depleted.
▲Use only genuine Bendix ® brand replacement parts,
components and kits. Replacement hardware, tubing, hose,
fittings, wiring, etc. must be of equivalent size, type and
strength as original equipment and be designed specifically
for such applications and systems.
▲Components with stripped threads or damaged parts should
be replaced rather than repaired. Do not attempt repairs
requiring machining or welding unless specifically stated
and approved by the vehicle and component manufacturer.
▲Prior to returning the vehicle to service, make certain all
components and systems are restored to their proper
operating condition.
▲For vehicles with Automatic Traction Control (ATC), the ATC
function must be disabled (ATC indicator lamp should be
ON) prior to performing any vehicle maintenance where
one or more wheels on a drive axle are lifted off the ground
and moving.
▲The power MUST be temporarily disconnected from the
radar sensor whenever any tests USING A DYNAMOMETER
are conducted on a vehicle equipped with a Bendix ®
Wingman ® system.
▲You should consult the vehicle manufacturer's operating
and service manuals, and any related literature, in
conjunction with the Guidelines above.

DESCRIPTION
IMPORTANT
Do not install the core module included in this kit if it
does not match the one being removed.
These kits are used to replace the Bendix® GSAT® (Global
Scalable Air Treatment) core module. These are not retrofit
kits. These kits cannot be installed on vehicles that do
not have an existing GSAT system. As shown in Figure 1,
there are several variants of the GSAT air dryer. Be sure to
verify the core module included in this kit is identical
to the core module you are replacing. Ensure both core
modules have the same port and mounting configurations
in the same locations.

When replacing the core module assembly, it is mandatory
that the air dryer cartridge and carbon filter be replaced.
For replacement kit part numbers and instructions, refer
to S-1693, Bendix® GSAT® (Global Scalable Air Treatment)
Air Dryer Cartridge and Carbon Filter Kits for Volvo®
Trucks, on B2Bendix.com.
NOTE: When replacing the air dryer cartridge, the cartridge
lifetime wear and wetness content will need to be reset. Use
Bendix® ACom® Diagnostic Software, or a Volvo® diagnostic
tool, to initiate the cartridge reset routines.

VEHICLE PREPARATION
1. Park the vehicle on a level surface and chock the wheels.
2. Turn the ignition switch OFF.
3. Drain all reservoirs to 0 psi (0 kpa).
4. Clean the exterior of the air dryer body to remove any
dirt and debris.

Always depressurize all air dryers and air reservoirs on
the vehicle to 0 psi (0 kpa) before servicing the air dryer.
Failure to drain the air pressure from all air dryers and
air reservoirs may result in injury and/or death.

Figure 1 – Core Module Kits

2

Air Connection
Port ID

Function/
Connection

Port Size
ISO 4039-2

Maximum
Torque

11 IN

Energy Inlet
Compressor

M22x1.5

44 ft-lb
(60 N•m)

12 IN

Energy Inlet
External Air Fill

M22x1.5

44 ft-lb
(60 N•m)

2.1 DEL

Energy Outlet to
Detached Core
Module

M22x1.5

44 ft-lb
(60 N•m)

4.5 CON

Control Line to
Detached Core
Module

M12x1.5

22 ft-lb
(30 N•m)

3 EXH

Exhaust

n/a

n/a

13

Supply from
Detached Dryer*

M22x1.5

29.5 + 5 ft-lb
(40 + 7 N•m)

14

Supply from
Secondary Dryer
(CFL)

M22x1.5

29.5 + 5 ft-lb
(40 + 7 N•m)

21

Energy Outlet
Service Brake
Front Axle

M22x1.5

29.5 + 5 ft-lb
(40 + 7 N•m)

22

Energy Outlet
Service Brake Rear
Axle

M22x1.5

29.5 + 5 ft-lb
(40 + 7 N•m)

23

Energy Outlet
Clutch and