DUAL DRYER SYSTEM
INSTALLATION/SERVICE
MANUAL (L31279)
®
General
This manual has been designed to assist personnel
in satisfactory installation, maintenance and
troubleshooting of the Haldex GeminiMDx High
Capacity Dual Air Dryer System. The intention
has been to provide guidance on certain aspects
of the product. It is expected that this manual
will be in possession of the appropriate person
throughout the install, maintenance and/or
troubleshooting process.
Safety and Important Precautions
• All company and vehicle manufacturer’s safety
procedures must be followed when installing
the GeminiMDx Dryer.
• Always wear proper personal protective
equipment, including approved eye glasses.
• Never work on or under a vehicle unless it is
parked on a level surface and its wheels are
blocked to prevent it from moving.
• Never work on a vehicle air brake system
when the engine is running. 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.
• Drain all air pressure from the air system
before beginning any installation, service or
repair.
• Never connect or disconnect a hose or
line containing pressure. Never remove a
component plug unless it is certain that all
system pressure has been depleted.
• Never exceed recommended component or
system pressures.
• Do not attempt to install, remove,
disassemble or assemble a component until all
recommended procedures have been read and
are fully understood. Use only the proper tools
and observe all precautions pertaining to the
use of those tools.
• Components with stripped threads or
damaged parts should be replaced rather
than repaired. Repairs requiring machining
or welding should not be attempted unless
specifically approved and stated by the
vehicle or component manufacturer.
• Prior to returning the vehicle to service,
make certain all components and systems are
restored to their proper operating condition.
Mounting and Installation Precautions
• The GeminiMDx uses a 4-bolt mounting
pattern. See “Dimensions and Port
Identification” on Page 8.
• If the GeminiMDx is to be bolted directly to
the frame or other support member, check
the vehicle manufacturers recommendations.
• At a minimum use grade 5, 1/2” bolts and
nuts.
• The GeminiMDx must not incline in any
direction more than 15° from vertical.
• Mount in a space to avoid excessive heat
sources (175°F maximum).
• Mount with the exhaust port oriented
downward.
• Mount in an area where it is protected from
wheel or road splash.
Replacement Parts/Retrofit Components
Use appropriate spare parts documentation
when obtaining spare parts. Only use Genuine
Haldex replacement parts in the repair process.
See a complete listing on Page 15.
Questions?
If you have any questions on this product or
any of the innovative products offered by
Haldex, contact your local distributor for
complete details. Technical Service or
Troubleshooting help can be obtained by
calling Haldex Technical Services Department
at 800.643.2374, follow prompts.
Important Notices
DUAL DRYER SYSTEM
INSTALLATION/SERVICE
GUIDE (L31279)
®
