M2/M3 BFV: TROUBLESHOOTING - OD1610 - LESSON 2/TASK 1
4.
Troubleshooting
The troubleshooting procedures used for the turret are written similarly to
those used for the hull.
However, there is one important difference that
should be discussed.
In the hull troubleshooting procedures, the fault
symptom index was vaguely written, whereas the fault symptom index for the
turret lists specific malfunctions. For example, the hull troubleshooting
procedure might list, "Cargo Hatch Troubleshooting." From this, we have to
determine what exactly is wrong, and then troubleshoot it.
The turret
troubleshooting procedure fault symptom index, however, might list, for
example, OPEN HATCH/NO FIRE ZONE ANNUNCIATOR LIGHTS ARE NOT WORKING
PROPERLY. This tells us exactly what the malfunction is and gives us a base
from which to start our troubleshooting.
In the following paragraphs, we will walk step-by-step through the
troubleshooting procedures for malfunctions in several different subsystems.
To make this a little more interesting to read, we will have a fictional
individual perform these procedures while we watch over his shoulder to see
how the procedures are performed. In the following paragraphs, reference to
"the TM" will refer to TM 9-2350-252-20-2-1, unless otherwise noted.
In paragraphs 2a(1) through 2a(3), on page 49 of this task, we learned that
the turret system is broken down into three subsystems, turret, weapons, and
auxiliary. For the troubleshooting procedures, we are going to take several
malfunctions from each subsystem.
a. Turret.
From the turret subsystem, we will troubleshoot three
different malfunctions.
For each of these malfunctions, an ultimate
conclusion will be listed and only those troubleshooting pathways that lead
to this conclusion will be followed.
(1) NO TURRET POWER WHEN TURRET POWER SWITCH IS ON.
For this
malfunction, we will follow only that troubleshooting pathway that leads us
to the conclusion that the turret distribution box is faulty. One afternoon
an M3 cavalry fighting vehicle (CFV) comes into the shop with the
malfunction stated.
The task of troubleshooting this malfunction is
assigned to SGT M. Elliott.
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