LOCATION AND DESCRIPTION OF MAJOR COMPONENTS
The wastewater tank has a maximum capacity of 1000-gallons. It incorporates a float valve mechanism (1)
that will shut off the vacuum system when the tank is full. It also incorporates a safety relief valve (2) that
will relieve internal tank pressure when it reaches 30 PSI. An internally mounted float indicates the level of
liquid in the tank on an externally mounted indicator/scale (3). A manway assembly (4) provides access
into the tank interior. A 4-inch hydraulically operated drain valve (5) is mounted onto the manway. A 2-
inch hydraulically operated intake valve (6) is welded directly onto the tank. A manual hydraulic pump (7)
mounted onto the rear platform is used to operate the intake and drain valves. Separate fusible frangible
links (8) provide for emergency shutoff of the hydraulic system to either the intake or drain valve, or both,
closing the valve(s). See Figure 1.
Power is furnished by a water-cooled, four-cycle, in-line overhead valve type diesel engine (9) mounted
together with the vacuum pump (10) on a removable skid (11) that is bolted onto the front of the trailer
frame. The engine drives the vacuum pump with a belt (12) attached to the pulleys (13). The engine (9)
also powers the 12-Volt electrical system used on the trailer and maintains the battery (14). Engine
performance is indicated on a control panel (15), which incorporates oil pressure (16), battery charge (17),
temperature (18), tachometer (RPM) (19) and hour meter gages (20). The control panel also incorporates
the ignition (21), emergency shutoff, (22) the rear work light toggle switch (23), a preheat light (24), and
warning lights for temperature (25), oil pressure (26) and battery charging (27) conditions. The engine
throttle (28) is mounted above the pulley guard (29). The engine exhausts through a vertically mounted
cylindrical muffler (30). See Figures 2 and 3.
The vacuum/pressure system consists of the vacuum pump (10) mounted together with the diesel engine
(9) on a removable skid that is bolted to the trailer frame, a primary shutoff located inside the tank (refer to
Wastewater Tank), a moisture trap (31), which functions as a secondary shutoff, a breather (32) that
evacuates air from the pump, an isolation valve (33) on the tank and a ball valve (34) on the intake
chopper tube/wand (35). See Figure 4.
The WWET/T includes a 12-volt battery (14) mounted to the trailer frame behind the vacuum pump (10).
The battery provides starting power for the engine (9), which in turn powers the electrical functions. The
trailer is equipped with turning, stopping and running lights (36) on the fenders as well as the tank. In
addition, license plate (37) and rear platform illumination is provided by lights mounted on a bracket
welded to the upper part of the tank. The control panel (15) has control gages. Standard automotive wiring
is used on the trailer. See Figure 5.
The trailer is a three-axle frame construction incorporating two equipment trays (38) to carry the 2 -inch
intake (39), and 4-inch drain hoses (40) as well as the chopper tube/wand (35), and a toolbox (41)
containing spare parts. The trailer is equipped with hydraulic brakes (42) and utilizes 16-in by 6-in-rims
mounting 85R16 tires (43). The 13-gallon fuel tank (44) is mounted under the equipment tray on the engine
side of the trailer. A trailer jack (45) to raise the front of the trailer is located on the left front of the trailer
frame. A lunette eye (46) and safety chains (47) are provided for connection to the prime mover. See
Figures 6, 7, and 8