
Technical Bulletin
Bulletin No: TCH-003-048 Effective Date: 10/4/05 Cancels: N/A Page: 1 of 3
Subject: Flood Damage: Bendix Recommended Procedure for Trailer and
Dolly Control Systems that may have been Submerged.
continued over
AIR BRAKE SYSTEM INSPECTION
In all other cases where the trailer or components
have been submerged in fresh water, the
recommended steps depend upon what is found
during the following inspections. If the vehicle was
in a coastal area and you are not certain whether
the water submergence was by fresh water or salt
(sea) water, our recommendation is to follow the
guidelines for salt water submergence above. A
separate section in this Bulletin covers inspections
for the ABS system.
While it is not the scope of this Bulletin to address
anything beyond the air brake control system of the
trailer and dolly, as a useful first step, Bendix
Commercial Vehicle Systems LLC recommends that
a thorough power-washing of the trailer and dolly,
including the foundation brakes, will assist the
technician in determining the condition of the vehicle
components. Follow usual chassis re-lubrication
measures (including re-greasing of slack adjusters)
after power-washing.
Since water and contaminants could have passed
into the air brake system through unprotected
gladhands, thoroughly inspect the gladhands and
the supply and control hoses to determine if any liquid
or solid contaminants are present.
If evidence of water or contamination is found
in either control or supply hoses, go to Section
A below.
If there is no obvious evidence of water or
contamination, mark and remove the connectors
at the first valve in the system from the front. Inspect
the valve for water and contaminants. Carefully use
air pressure to blow air through the hoses and watch
for evidence of water or contamination. CAUTION:
Take all necessary precautions for safety of the
technician and others in the work area during
this procedure, including use of appropriate
eye protection.
If evidence of water or contamination is found,
go to Section A below.
Continue to inspect all the valves in the air brake
system, removing one service and control hose from
each of the valves and inspect to determine if there
is evidence of water or contamination. If evidence
of water or contamination is found, follow the
instructions under Section A.
This Bulletin provides a recommended procedure for the inspection and (where possible) reconditioning of
the air brake control system components on a trailer or dolly that has been submerged in flood waters.
CAUTION: Take all appropriate safety measures when working in conditions where hazardous
waste, etc. may be present, including appropriate eye protection, gloves and masks. See the
General Precautions section at the end of this Bulletin for recommended standard maintenance safety
practices for normal conditions.
SALT (SEA) WATER IMMERSION
Bendix Commercial Vehicle Systems LLC recommends immediate replacement
of
all trailer or dolly pneumatic air brake valves that have been submerged in
salt (sea) water to avoid any immediate or future operational issues as a result of
internal corrosion. Due to the extremely corrosive nature of salt water and the inherent
removal of valve lubrication, sudden and premature valve malfunction can result. Vehicle
components recommended to be replaced include air reservoir(s), relay valves, spring
brake valves, ABS relay-modulators and brake actuators. If the air brake components
are being replaced, there is no need to conduct the Air Brake System Inspections below,
instead go to the sections for ABS System inspections and also the “General” heading
for steps in restoring the vehicle to service.
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