Fleet Maintenance - 29

enter the cab. Next, to create a sealed environment,
roll up the windows and close the doors. "What
that does is provide a positive pressure inside the
cab," Hawkins says.
To search for a leak, a technician would then
walk around the outside of the vehicle with the
smoke machine, blowing smoke along any area
where a leak may be suspected - including along
edges and seams.
With the cabin's positive pressure and a smoke
machine, leaks can be detected fairly quickly by noticing a
deflection of the smoke as it is
passing along the seams of the
windshield.
"The positive pressure
forces air out of the cab at
[the location of the leak] and
it deflects the smoke in the
opposite direction that it
is flowing out of the smoke
hose," Hawkins says.
Detecting cabin leaks should
be done at a low pressure.
"You're going [to] be inside
when you do this [procedure];
if you're outside, forget it,"
says Chuck Abbot, vice president, global automotive,
CPS Products. CPS Products
designs and manufactures
tools, instruments, and service
equipment to deliver leak
detection technologies. "If
there is any wind, it will cause
a disruption in the smoke
pattern. And you certainly
don't want to be standing next
to a blowing fan [during this
procedure]. So, it does require
being in a rather still area."
Abbott also suggests utilizing
a diffuser on the smoke hose.
"If you don't diffuse the
smoke, it is coming out rather rapidly, and it's hard to
disturb a rapid movement of
smoke," Abbott says. He advises that with a rapid movement
of smoke, a technician would
be unable to see a disruption
in the smoke pattern at the
leak location.
"Use a device that diffuses
and slows down the flow of
smoke and causes the smoke to
basically sit in suspension over
the potential leak area. [This
allows] you to see the slightest
interruption," he adds.
"It is such a simple, clean
procedure, and it keeps the
cab completely isolated and
clean. You're not getting any
vapor inside of the cab," says
Alex Parker, CMO of Redline
Detection. "It's a very quick
procedure that, if used either

in repair or PM, gives you 100 percent confidence
in being able to find the leak point."
The team at Redline Detection recommends
fitting this procedure into preventive maintenance
schedules to stay ahead of moisture intrusion
and the maintenance implications should a leak
remain undetected and un-serviced.
After the leak point is detected and repaired,

performing the detection procedure again establishes a system to "quality control your repair,"
Hawkins says.
Utilizing a smoke machine and a pressurized
cabin, technicians can quickly, easily, and confidently pinpoint the location of a leak at the seam
of the windshield, seal the leak, and keep the vehicle up and running.

29

MarchVehicleServicePros.com/10122738
2020 | VehicleServicePros.com


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Fleet Maintenance

Table of Contents for the Digital Edition of Fleet Maintenance

Uptime: Get Involved
The Role of Composites in Heavy Duty Trucking
Best Practices to Establish a Total Vehicle Alignment Program
Document Management in the Digital Age
Smoke Out Cabin Leaks
Four Keys to a Successful Extended Drain Interval Program
Management: Be Aware of Maintenance Scheduling Challenges in the Shop
Training: What Does Trucking Have to Do With STEM?
Fleet Parts & Components
Tools & Equipment
Classifieds
Guest Editorial: The Ripple Effect of Unplanned Downtime
Fleet Maintenance - 1
Fleet Maintenance - 2
Fleet Maintenance - 3
Fleet Maintenance - 4
Fleet Maintenance - 5
Fleet Maintenance - 6
Fleet Maintenance - 7
Fleet Maintenance - Uptime: Get Involved
Fleet Maintenance - 9
Fleet Maintenance - The Role of Composites in Heavy Duty Trucking
Fleet Maintenance - 11
Fleet Maintenance - 12
Fleet Maintenance - 13
Fleet Maintenance - 14
Fleet Maintenance - 15
Fleet Maintenance - Best Practices to Establish a Total Vehicle Alignment Program
Fleet Maintenance - 17
Fleet Maintenance - 18
Fleet Maintenance - A1
Fleet Maintenance - A2
Fleet Maintenance - A3
Fleet Maintenance - A4
Fleet Maintenance - 19
Fleet Maintenance - 20
Fleet Maintenance - 21
Fleet Maintenance - Document Management in the Digital Age
Fleet Maintenance - 23
Fleet Maintenance - 24
Fleet Maintenance - 25
Fleet Maintenance - 26
Fleet Maintenance - 27
Fleet Maintenance - Smoke Out Cabin Leaks
Fleet Maintenance - 29
Fleet Maintenance - Four Keys to a Successful Extended Drain Interval Program
Fleet Maintenance - 31
Fleet Maintenance - 32
Fleet Maintenance - 33
Fleet Maintenance - Management: Be Aware of Maintenance Scheduling Challenges in the Shop
Fleet Maintenance - Training: What Does Trucking Have to Do With STEM?
Fleet Maintenance - Fleet Parts & Components
Fleet Maintenance - 37
Fleet Maintenance - 38
Fleet Maintenance - 39
Fleet Maintenance - 40
Fleet Maintenance - 41
Fleet Maintenance - Tools & Equipment
Fleet Maintenance - 43
Fleet Maintenance - 44
Fleet Maintenance - 45
Fleet Maintenance - 46
Fleet Maintenance - 47
Fleet Maintenance - 48
Fleet Maintenance - Classifieds
Fleet Maintenance - Guest Editorial: The Ripple Effect of Unplanned Downtime
Fleet Maintenance - 51
Fleet Maintenance - 52
Fleet Maintenance - B1
Fleet Maintenance - B2
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