ACtion Magazine - April 2013 - (Page 28)
Heavy duty/off road
by Scott Weaver
much quicker and easier than ever before. JPRO is aimed squarely at
commercial fleet and Heavy Duty/Off road service centers.
To finish the morning session, Instructor Tony Yerman with
TLY Consulting schooled us in RV air conditioning repair issues.
Tony told us right at the start, “It’s not the air conditioning that is
necessarily going to be your problem, but the way it is configured in
He explained the difficulties are due to the variety of manufacturers
Morning classes started with Mike Maxwell and Tom Wilkins
and the types of A/C systems, and the numerous locations. He
from Noregon Systems, introducing the company’s newest diagnostic reminded us that RV owners may mistakenly block vents, slack
tools for the heavy duty technician. The JPRO Commercial Fleet
on general maintenance, or perhaps be the recipient of some
Diagnostic system allows a tech to interact with all major heavy duty
construction material left in the ducting, and that animal intrusion,
engine platforms, ABS, transmissions, and HVAC systems. Over a
insects or accident damage can also add up to poor air flow.
dozen OEM and independent manufacturers’ scanner information
Unlike a passenger car, where there is only one source of electrical
can be integrated to the JPRO software running on a Windows
power, a motorhome has several options for supplying energy to
platform. With just one click on the easy-to-read screen, a technician operate the A/C. These all can be potential sources of voltage and
can go from engine back to transmission without ever having to
“It’s not uncommon to have a wire color change several times
As Mike and Tom said, “You can’t fix what you can’t see. The
from the front to the back of the unit, depending on how many subJPRO allows you to link all of the systems under one application.
assemblies and/or vendors a certain system had to go through,” Tony
Every Truck, Every Time.” With over 2,800 OEM codes in use
went on to say.
today, plus the fact that some of these codes can only be seen on
A typical engine-mounted system may have the compressor and
certain platforms, the ability of the JPRO to interact with all of these
a section of the pressure hoses supplied by the chassis vendor, while
different software applications makes the technician’s diagnostic chore the evaporator core, condenser, or drier units may be supplied by a
different vendor. Even the dash controls might
come from a different source than everything else.
As Tony reminded us all at the end of the session,
“Think out of the box in order to start your
The afternoon classes had a lot to offer as well.
Al Leupold, a long time presenter at MACS (now
with Bergstrom), was up first; he brought us up
to date on A/C preventive maintenance issues.
“HVAC system repair ranks 3rd just behind tires
and brakes respectively,” Al told the group.
Finding the proper tools and information and
avoiding poor product information were just some
of the topics Al’s detailed lecture covered. He
went on to tell us, “The ultimate goal is to satisfy
the customer. Look at the cost of NOT training
your technicians rather than the cost to train
them.” I totally agree; the lack of training only
means a lack of satisfactory results for the customer.
Al also focused on the importance of
maintenance, and that more than 75% of most A/C
breakdowns could have been avoided if proper
maintenance had been done. These maintenance
RV air conditioners have more than one source of electrical power.
issues not only involve the customer’s car but also
TYL Consulting illustration
etting information to the individuals who need to
know is what the technical sessions at the MACS
convention are all about, and the Heavy Duty/Off
Road session was no exception. New techniques,
advanced testing procedures, and overviews of existing
procedures were all part of the topics covered in this year.
ACTION • April 2013
Table of Contents for the Digital Edition of ACtion Magazine - April 2013
ACtion Magazine - April 2013
Under the Southern Cross
News & Updates
State of the Industry
R-1234YF Design and Service Considerations
Heavy Duty/Off Road Technical Session
Hybrid Evolution Continues
Modern Automotive HVAC Systems
Old-Timers, Team Players, Slackers and Kids: Do Your Employees ‘play’ Well Together?
Cheap Isn’t Always Best
A/C Season Check List: Is Your Shop Ready?
MACS 2013 Training Event Social Wrap-Up
Wallace Talks Up Big Brother
New Products & Services
ACtion Magazine - April 2013