M2/M3 BFV: TROUBLESHOOTING - OD1610 - LESSON 1/TASK 1
been corrected and that nothing else seems to be wrong.
The car operates
fine, so you return home to an afternoon of baseball and beer.
a. Inspection is defined as the visual checking of an item or items to
ensure that they conform to set standards. In other words, you are visually
looking for something wrong.
b. An inspection is the very first step that should be performed once a
malfunction has been verified. Before dragging a lot of test equipment out
to a vehicle or piece of equipment, first go out and look over the system
for any obvious defects.
In the paragraphs that follow, the inspection
procedures will be discussed.
Check for external physical damage such as broken or bent parts,
cracked castings, or broken pins.
Look for burned, charred, scorched or
water-soaked boxes. Additionally, check for evidence of leaks. Leaks are
grouped into three classes, depending on their severity.
Each of these
three classes will be discussed in the paragraphs that follow.
(1) Class I. In a class I leak, seepage is not great enough to form
drops, but is shown by wetness or changes, such as discoloration of the
surrounding area. The vehicle may continue to operate with a class I leak,
provided that the substance leaking is either water or oil. Any fuel leak,
regardless of severity, is grounds for deadlining the vehicle.
(2) Class II.
In a class II leak, the leakage is great enough to
form drops, but the drops do not fall from the item being inspected. The
vehicle is still able to operate with a class II leak, provided it is not
fuel that is leaking.
(3) Class III. In a class III leak, the leakage is great enough to
form drops that fall from the item being inspected. With a class III leak,
regardless of the type of fluid (water, oil, fuel), the vehicle will be