BENDIX TCH-008-044 Dépliant
Bulletin No:
Page: 2 of
TCH-008-044
2
© 2015 Bendix Commercial Vehicle Systems LLC, a member or the Knorr-Bremse Group. All Rights Reserved.
Shutting Vehicle Down in Cold Temperatures
When powered vehicles must be shut down for a period of time and ambient temperatures are expected to
be below freezing, it is beneficial to fan the air brake system down to just below the system cut-in pressure.
Doing this with the engine OFF, while it is still at operating temperature, allows the compressor and dryer
to be in the “charge mode” on engine start-up. This minimizes the potential for these components to be
frozen in the “unloaded mode” until the air dryer heater and power train heat allows these units to reach
normal operating temperature.
Protecting Towing Connections on all Towing Vehicles
Protecting Towing Connections on all Towing Vehicles
For all tractors, towing trucks, trailers and converter dollies, Bendix recommends that vehice
operators take precautions to ensure that all glad-hand connections are protected from the
environment when not coupled. This involves using glad-hand hangers and glad-hand dummy couplings
for both front (input on trailers & dollies) and rear (output on tractors, trailers, & dollies) couplings to protect
against the entry of foreign airborne contaminants. This includes protection from road debris, contaminants
and weather elements in the form of precipitation. These items can be sucked into the open glad-hands
due to the vortex created at the back of the trailer as it travels down the highway.
Please note that all front (input) glad-hands still need to be vented to atmosphere. This can be through a
Please note that all front (input) glad-hands still need to be vented to atmosphere. This can be through a
small hole — or breather valve — to prevent mishaps such as “false parking” via trapped pressure in the
trailer service line, or to prevent the unintentional release of the trailer parking brakes by pressurizing the
trailer supply line as a result of system leakage. To further reduce any potential issues related to liquid water
entering via open glad-hand connections, Bendix offers the Cyclone DuraDrain
®
trailer water separator
which helps remove all liquid water and other contaminants from the trailer control and supply lines. See
SD-08-2402 for information on the Cyclone DuraDrain trailer water separator.
Also, note that Bendix recommends vented shut-off valves on the back of trailers and the use of the Bendix
Also, note that Bendix recommends vented shut-off valves on the back of trailers and the use of the Bendix
®
SV-4
™
synchro valve in the supply line on converter dollies to prevent false charging on trailers and dollies.
Refer to technical bulletin TCH-003-027 for details concerning this recommendation.
Shown below are the documents referenced in this bulletin, as well as additional pieces that may be of
Shown below are the documents referenced in this bulletin, as well as additional pieces that may be of
interest. To download or order these items and more, visit the document library online at www.bendix.com.
Technical Bulletins
Service Data
Miscellaneous
TCH-003-027
SD-08-187
SD-08-2412
BW2600
TCH-008-021
SD-08-187B
SD-08-2416
BW2625
TCH-008-022
SD-08-2401
SD-08-2417
BW2327
TCH-008-042
SD-08-2402
SD-08-2418
SD-08-2403
SD-08-2433
SD-08-2407
SD-98-9808
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