MAINTENANCE OF M939 SERIES VEHICLES - OD1661 - LESSON 1/TASK 2
if the system is clear.
Since the system does not appear to be
clear, SSG Williams disconnects the tubing from the atomizer and
checks for restrictions.
Since no restrictions were found, this
indicates that the atomizer is defective and needs to be replaced.
The atomizer is replaced in accordance with the procedures contained
in paragraph 4-18, TM 9-2320-272-20-1.
After the atomizer has been replaced, SSG Williams repeats the
troubleshooting procedures to ensure that the malfunction has been
corrected and that no additional malfunctions exist.
c.
Exhaust
System Troubleshooting.
In the following paragraphs we
will follow
SGT Rude as he troubleshoots the exhaust system for the
malfunction
EXHAUST FUMES IN THE CAB to the conclusion that the
manifold and
exhaust pipes are cracked and need to be replaced.
NOTE
Though the troubleshooting procedure for this
malfunction is extremely short, it is very
important as exhaust fumes can kill the occupants
of the vehicle and/or cause an accident.
The first thing that SGT Rude does is read DA Form 2404 and talk to
the operator of the vehicle.
After this has been done, SGT Rude
reads through the troubleshooting procedures to determine the tools
necessary for the job. Since no tools are required, SGT Rude goes to
the vehicle and configures it according to the procedures outlined in
paragraphs 3a(l) thru 3a(5) on page 34 of this task. Once this has
been done, SGT Rude is ready to begin troubleshooting.
As a first step, SGT Rude is directed to inspect the exhaust
manifold, pipes, and connections for leaks, cracks, or damage. Upon
inspection SGT Rude found that the entire exhaust system on the
vehicle needed to be replaced since it had rusted through.
The
procedures for replacing the exhaust system components can be found
in chapter 3, section V of TM 9-2320-272-20-1.
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