Suction Unit

The suction unit of sprayers comprises a 4-way ball valve (A), a suction filter (C) and a filling hose connection (B). The suction unit is constructed in such a way that liquid can be sucked either from the solution tank, from an external source or from the rinse tank.

A-4-way suction ball valve
B-Filling hose connection
C-Suction filter

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The position of the arrow on the handle of the 4-way ball valve indicates the direction from which the liquid is sucked (see illustration).

The liquid will always flow through the suction filter (30 mesh) in order to protect the pump against contamination in the liquid. The 30 mesh suction filter has a mesh width of 420 micron. A disk with symbols is fitted on the ball valve, showing the various positions of the four-way valve.

A-Suction closed
B-Suction of clean water
C-Suction of spraying liquid
D-Suction from external source

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The suction filter(s) must be cleaned regularly (after each use). This can be done simply be closing the four-way valve, unscrewing filter cup (B) and removing filter element (A). Regular cleaning of the filter will prevent blockage through silting up. Silting up can cause excessive vacuum in the suction line to the pump, resulting in increased wear of the pump.

A-Filter element
B-Filter cup

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A filling hose can be attached to the external connection point. The external connection point has a 2" female thread. The trailed sprayer is fitted with either a camlock coupling, a B/C Storz coupling or with a firebrigade coupling. These male couplings are screwed in the thread and have a blind cap to close the filling connection if no filling hose is connected.

Use the correct diameter filling hose, as too narrow a filling hose will cause excessive wear to the pump. Make sure couplings and hose connections are kept clean, to ensure effective sealing. If this is not the case, air will be sucked in, which may damage the pump.

The 2" filling hoses supplied by John Deere are not fitted with couplings. A separate kit with a female coupling and hose barb with either a camlock, B/C Storz or firebrigade connection are supplied together with the filling hose. These couplings have to be fitted to the filling hose. The filling hoses (A) are 6 or 9 meters long, and are fitted with a strainer (B).

A-Filling hose
B-Strainer
C-Integrated float

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The tank can be drained with a remote controlled drain valve operated by pulling up rope (A) on top of the tank.

A-Rope

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