M2/M3 BFV: TROUBLESHOOTING - OD1610 - LESSON 1/TASK 1
fan flex hose and being exhausted through the firing port exhaust ducts?"
SSG Taylor checks and finds that air is being drawn in through each of the
firing port vent fan flex hoses and is being exhausted through the firing
port exhaust ducts, so the answer to the question is "yes." He would then
follow the yes arrow to the next block of instructions.
Here, SSG Taylor is directed to place the GUN PORT VENT FAN switches to the
OFF position, and to push the firing port vent levers down to the closed
position. Once this is done, SSG Taylor places the MASTER POWER switch to
the OFF position and raises the ramp. The final statement in this box is NO
This means that SSG Taylor performed the troubleshooting
procedures and could find nothing wrong. However, to verify this, he must
go back to the beginning of the troubleshooting procedures and repeat each
step to ensure that the malfunction has been corrected and that there is
nothing else wrong.
(2) Powertrain System Troubleshooting.
In the next paragraphs, SSG
Taylor is going to troubleshoot the power train system following the
pathways that lead to the conclusion that the engine oil pressure is low.
Again, remember, we are following only one of many troubleshooting pathways
that may be encountered.
In this situation, an M2/M3 arrives at the shop accompanied by a DA Form
that the oil pressure is low. The crew has performed their portion of the
troubleshooting procedures which mainly consist of checking the level of the
engine oil, that was found to be within the limits prescribed on page 3-98
of TM 9-23520-252-10-1. After reading the DA Form 2404 and talking with the
crew, SSG Taylor locates the troubleshooting procedures in the TM.
After finding the troubleshooting procedures, he checks to see what tools
and equipment will be needed.
For this particular procedure, SSG Taylor
will need the general mechanic's automotive tool kit, STE-M1/FVS (VTM only),
and a helper. The vehicle should be parked with the engine stopped and the
FIRE SUPPRESSION switch in the MANUAL