Lesson 2
FIGURE 35. M149A1 WATER TRAILER.
The M149-series water trailer is designed to be towed by the 2 - and 5-ton vehicles. It has a 400-
gallon capacity, with either a fiberglass or stainless steel tank. It uses air-actuated hydraulic brakes.
SEMITRAILERS
Semitrailers are easy to recognize because they have wheels at only one end. On the other end,
there is a fifth wheel upper plate with a pin that engages the fifth wheel of a tractor truck for
towing. Also, near the fifth wheel end, there is a landing gear that can be lowered to support the
trailer when it is not connected to a tractor. Several different types of semitrailers used by the
Army are discussed in the following paragraphs.
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