Manual Suction Unit

The manual suction unit for sprayers with a single pump comprises of 4-way ball valve (A), a suction filter (C) and a filling hose connection (B). The suction unit is designed so that liquid can be sucked from either the solution tank, 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 suction ball valve indicates the direction from which the liquid is sucked (see illustration).

The liquid will always flow through the suction filter in order to protect the pump against contamination in the liquid. The suction filter has a mesh width of 420 micron (0.42 mm). A decal with symbols is fitted on the protective cover in front of the ball valve, showing the various positions of the four-way suction valve of the spraying pump.

A-External suction (filling hose)
B-Suction of rinse water
C-Suction closed
D-Suction of spraying liquid

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The suction filter must be cleaned regularly (after each use). This can be done simply by 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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With the optional suction filter with drain tap (WZ1845085), the remaining liquid in the filter cup can be drained first by opening tap (C).

B-Filter cup
C-Suction filter with drain tap

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A filling hose can be attached to the external connection point. The external connection point has 2" female thread. The trailed sprayer is fitted with either a camlock (quick release coupling) , Fire Service or B/C-coupling (Storz). 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 hose supplied by John Deere is not fitted with couplings. A separate kit with a female coupling and hose barb with either a camlock (quick release coupling) , Fire Service or B/C-coupling (Storz) is 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) and float (C).

A-Filling hose
B-Strainer
C-Float

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The tank cannot be drained via the suction valve. After all, an operating error could cause an undesirable open connection between the tank and the external connection point. The tank could then drain empty, with all the consequences. Instead, a separate drain ball-valve (A) has been fitted between the solution tank and the suction valve. The arrow on the handle of the drain valve indicates the position of the ball valve with L-bore.

The decal (B) beside the drain valve shows the function. If the arrow on the handle of the drain valve is pointing down, the solution tank can be drained after removing the security plug. If the arrow on the handle of the drain valve is pointing up, the liquid from the solution tank can be aspirated via the suction valve to the pump. If the handle is in a horizontal position, aspiration of liquid from the solution tank is not possible. Therefore this position should never be used when the pump is running, since otherwise damage to the pump could occur (pump running dry).

A-Drain valve
B-Decal drain valve

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