M2/M3 BFV: TROUBLESHOOTING - OD1610 - LESSON 1/TASK 1
position. After gathering the necessary assistance, tools, and equipment,
SSG Taylor and his helper go out to the vehicle.
The first step in the troubleshooting procedure is to start the engine,
following the procedures contained on pages 2-144 through 2-151 of TM
The next step in the first box of instructions is a
question asking if the engine started. In this case, the engine did start.
Therefore, SSG Taylor and his assistant followed the yes arrow to the next
box which asked if the engine had a loud knock.
For this particular
situation, the answer to the question was no--the engine did not have a loud
Since the answer to the previous question was "no," SSG Taylor will follow
the no arrow to the next box of instructions. In this box of instructions,
SSG Taylor is directed to connect the STE-M1/FVS VTM to jack 1A1J14
following the procedures contained on page 3-808 of the TM. Once the VTM is
connected, SSG Taylor is directed to perform VTM test number 50 which tests
the engine oil pressure. The final statement in this box of instructions is
another question. The question is, did test number 50 pass? The answer to
this question is no; therefore, SSG Taylor will follow the no arrow to the
The next box directs SSG Taylor to remove the STE-M1/FVS VTM and to shut
down the engine. Once the engine is shut down, SSG Taylor gathers up the
tools, goes back into the shop, writes on the DA Form 2404 that the engine
oil pressure is low and then notifies his supervisor.
procedure, SSG Taylor is going to follow those pathways that lead to the
conclusion that the brake assembly shaft and connecting link are damaged.
In this instance, the vehicle arrives at the shop with a brake system
malfunction. SSG Taylor talks with the crew to find out as much as possible
about the malfunction. Then he looks up the troubleshooting procedures in
First, he reads the Initial Setup section to see what tools,
materials/parts, and personnel are required, and how the equipment needs to