Section I. GENERAL INFORMATION
a. The 6000 Gallon, Semitrailer Mounted Water Distributor (Model WD6S) is designed to spray large quantities of
water over a wide area. It can be used in fire fighting operations. It is equipped with a Marlow 4CF pump which is driven
by a Perkins 4.108 diesel engine.
b. The water distributor has its tank mounted on a main frame to which the springs and tandem axle are attached.
The tank is elliptical with surge plates on 4 ft. (1.2 m) centers. The inside of the tank is coated with asphalt to prevent
corrosion. The tank has a 20 in. (50.8 cm) diameter manhole to allow for intake of water, inspection, cleaning, and
repair of tank. A ladder is provided to allow personnel to access the manhole.
c. The water pumping system is powered by a Perkins 4.108 liquid-cooled, diesel engine located at the rear of the
water distributor. The centrifugal pump is self-priming, and after initial filling has a pumping capacity of 600 gpm (2271
1pm) at 40 psi (276 kPa). The spray system has two fan-type nozzles that will deliver water 35 ft. (10.7 m) to each side
of the centerline of the water distributor.
d. A unique feature of the water distributor is that it can be operated by the tractor operator from an auxiliary control
box panel. The auxiliary control box can be removed from the tractor and stored on the water distributor when the units
e. The water distributor has a fifth wheel height of 62 in. (157.5 cm), which makes it compatible with the M123AlC,
10 Ton, 6X6 Truck, Tractor; the XM920; and the XM916.
f. The water distributor has a fire fighting capability and is equipped with a 1.5 in. (3.8 cm) fire hose and nozzle.
1-2. OPERATIONAL CONCEPT.
The water distributor is designed to be used in support of road, airfield, and berm construction, dust control, soil
stabilization, and firefighting.
MOS requirements are as follows:
a. Operator. MOS 62J20, General Construction Machine Operator.
b. Unit Maintenance. MOS 62B20, Construction Equipment Repairman.
c. Direct Support and General Support Maintenance.
(1) MOS 62B30, Construction Equipment Repairman.
(2) MOS 63G20, Fuel and Electrical Systems Repairman.
(3) MOS 44B20, Metal Body Repairman.
Figure 1-1. Water Distributor.