may2021 - 23

components in a modern truck. Another problem
with the soapy-water method is that many modern
trucks' computer systems will not allow the engine
to produce boost while sitting in a bay. "
An alternative to the soapy-water method is to
use an ultrasonic listening device. But in a noisy
shop, that can prove to be impractical, as well.
So, what is a heavy duty technician to do?
The Technology & Maintenance Council (TMC) has
developed a Recommended
Practice (RP 375) that utilizes high-pressure leak detection technology to address
upstream leak detection in
aftertreatment systems.
Redline Detection's HD
PowerSmoke technology uses
regular compressed air to
maintain a variable pressure
of 2 to 20 psi throughout the
intake and exhaust system.
Compressed air is injected
into the system, followed by a
visual vapor that replicates the
boost load of a running engine.
The vapor flows through the
truck's hoses, tubes, and related components. If there is a
leak, the vapor escapes at that
precise point, allowing the
technician to visually identify
the location.
An added bonus to this
procedure is the fact that the
engine can remain safely off.
As importantly, the procedure
is quick and easy.
" It typically takes less than
five minutes to test an entire
aftertreatment system, " said
Mark Hawkins, head of technical products at Redline
Detection. " The technician
seals the largest orifices on
the engine and the exhaust
with our intake adapters.
Then the visual vapor is
introduced within those two
points. It's designed so that
when it inflates, it creates
the perfect seal regardless of
make or model. "
Parker says Redline's unique
leak detection technology can
be used for triage diagnostics
when a truck comes into the
bay with an issue. Additionally,
technicians can use this RP 375
procedure for preventive maintenance in an effort to locate
faults before they trigger excessive forced regens or derate.
As a preventive measure,
Hawkins says some fleets
conduct a visual vapor leak
inspection every 90 days.
Regularly inspecting for leaks
can help prevent costly system

failures. " A lot of leaks are found prior to an engine
light coming on, " Hawkins pointed out.
Fleets have plenty of solutions at their disposal to help get a better handle on aftertreatment
system management. From training and tools to
innovative services and procedures, it is up to
fleets to take advantage. Yes, some investment
is necessary. But when potential costs and other

downsides of poor aftertreatment system maintenance are factored in, the ROI picture becomes a lot
clearer. Then, when you look at the potential costs
and downsides of tampering with an aftertreatment system, the ROI really comes into focus.
For related content, visit:
FleetMaintenance.com/in-the-bay

GENUINE
PARTS
Designed, Tested and Validated to propel MAAXUPTIME

™

ORIGINAL PARTS.
ORIGINAL FIT.
ORIGINAL PERFORMANCE.

Our philosophy yields some of the most innovative products and services in
the transportation industry. Whether you're buying a Hendrickson suspension
system, Genuine Parts or using one of our many online services, rest assured
we engineer, design, manufacture and offer MAAXUPTIME™ resources and
solutions to help you work more efficient.
Actual product performance may vary depending upon vehicle configuration, operation, service and other factors.

©2021 Hendrickson USA, L.L.C. All Rights Reserved. All trademarks shown are owned by Hendrickson USA, L.L.C., or one of its affiliates, in one or more countries.
May 2021 | FleetMaintenance.com
FleetMaintenance.com/Inquire

http://www.FleetMaintenance.com/in-the-bay http://www.FleetMaintenance.com/Inquire

may2021

Table of Contents for the Digital Edition of may2021