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The path of fuel flow through the system is pretty simple. Diesel fuel tanks normally are positioned above the engine''s fuel-injection pump to provide a positive pressure head to the fuel filter and transfer pump. This positioning assures easy priming of the system and assists fuel flow as the filters become more restricted. The fuel is moved by the transfer pump (usually a diaphragm type).The transfer pump, normally with the help of gravity, pulls the fuel through a primary filter and pushes it through a secondary filter before the fuel reaches the main pump. When a camshaft lobe in the injection pump lowers the plunger, the transfer pump pushes fuel into the chamber above the plunger in proportion to the position of the metering system. As the engine camshaft rotates, the injection pump plunger rises, pushing the fuel at high pressure out of the delivery valve, into the high-pressure fuel lines, and on to the injector nozzle. The high-pressure fuel inside the injector nozzle surrounds the valve (piston) and pushes up on the piston step against a predetermined spring setting. As the piston lifts, fuel leaves the nozzle tip and flows out the nozzle orifice into the pre-combustion chamber or cylinder.

Hitch up the 1690 and one of our high-capacity 1910 Commodity Carts and see what it''s like to seed 400 acres per day--with up to 270 bushels behind you, you won''t be refilling anytime soon. A single rank of our new 90 Series Openers sits at the business end. Paired with our active hydraulic down-pressure system, these'' openers can cut the toughest no-till rubble or glide through the cleanest, best-prepped seedbeds, placing seed at a precise, consistent depth.The 1690 CCS gives you many of the same features as the 1690, but with the bulk seed carrying capacity of our new Central Commodity System. CCS tanks carry up to 100 bushels of seed, eliminating the need for a Commodity Air Cart. Underneath the tanks, the maintenance-free CCS Seed Metering System delivers seed directly to the openers for unmatched population rate control.

[FIGURE 8 OMITTED]To give the water team more breathing room, the 3T group suggested that the water team divide the official start of the test into two components: (1) the BWP and the reverse osmosis and (2) the reverse osmosis and the other two subsystems (AES and PPS). In the iWRS system, the pivotal subsystem is the reverse osmosis. This system receives BWP effluent, processes it, and provides product water for the two downstream systems. In effect, the BWP is independent of the downstream systems, so it could conceivably be started early when the downstream systems were still being built. Because of the modularity of 3T, the initial iWRS could consist of the first two subsystems, with the output going to drain while the inoculation proceeded, and the second iWRS could include all four subsystems. In this manner, the water team started the test with only the first two subsystems in April 2000 and brought the other two systems online in December 2000 in time to make a January 2001 full start.

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