Spray Boom
Two ranges of hydraulically operated spray booms (A) are offered: The hydraulic functions are electro-hydraulically operated by means of the EHC-2 control box. In the transport position, the spray booms are divided into two or three segments on each side above the machine. The spray boom comprises rigid, self-bearing and mutually hinging segments, connected to one another. These segments contain a total of 4 to 13 spray line sections, depending on the version. The outer spray boom segments (B) are (partly) protected against obstacles. Upon contact with an obstacle, the segment in question deflects (backwards, forwards or upwards) and can return to its original position once the obstacle has been passed. The spray lines and nozzle bodies are also completely protected along the whole boom width, in order to avoid damage to the nozzles as they move forward during spraying. |
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WZ00085,0000361 -19-05SEP06-1/11 |
| Section division of spray boom | ||
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| Spray boom | No. of sections | Section widths (m) |
| Double folding booms: | ||
| 18/12 m | 6 | 3-3-3-3-3-3 |
| 20/12 m | 5 | 4-4-4-4-4 |
| 21/12 m | 5 | 4.5-4.5-3-4.5-4.5 |
| 21/12 m | 7 | 3-3-3-3-3-3-3 |
| 24/12 m | 4 | 6-6-6-6 |
| 24/12 m | 6 | 4-4-4-4-4-4 |
| 24/12 m | 8 | 3-3-3-3-3-3-3-3 |
| 27/15 m | 9 | 3-3-3-3-3-3-3-3-3 |
| 28/14 m | 7 | 4-4-4-4-4-4-4 |
| 28/14 m | 8 | 4-3-4-3-3-4-3-4 |
| 30/15 m | 9 | 4.5-3-3-3-3-3-3-3-4.5 |
| Triple folding booms: | ||
| 24/18 m | 8 | 3-3-3-3-3-3-3-3 |
| 27/18 m | 7 | 4.5-4.5-3-3-3-4.5-4.5 |
| 27/21 m | 9 | 3-3-3-3-3-3-3-3-3 |
| 28/20 m | 7 | 4-4-4-4-4-4-4 |
| 30/21 m | 9 | 3-3-3-3-3-3-3-3-3 |
| 32/21 m | 8 | 4-4-4-4-4-4-4-4 |
| 33/21 m | 9 | 3-3-4.5-4.5-3-4.5-4.5-3-3 |
| 33/21 m | 11 | 3-3-3-3-3-3-3-3-3-3-3 |
| 36/24 m | 9 | 4-4-4-4-4-4-4-4-4 |
| 36/24 m | 12 | 3-3-3-3-3-3-3-3-3-3-3-3 |
| 39/27 m | 9 | 4.5-4.5-4.5-4.5-3-4.5-4.5-4.5-4.5 |
| 39/27 m | 13 | 3-3-3-3-3-3-3-3-3-3-3-3-3 |
WZ00085,0000361 -19-05SEP06-2/11 |
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Height adjustment
The spray boom is adjustable in height by means of a parallelogram (A) with two hydraulic cylinders (B). The height adjustment system has a pressure accumulator (D) which functions as a shock absorber for the spray boom. The cylinders allow for height adjustment of the spray boom from 55 to 245 cm with 270/95R48 tires. The hydraulic cylinders must regularly be completely slid in. When the spray boom is raised with the boom folded in, the transport lock (C) and the mechanical locks of the outer spray boom segments will release. The spray boom can be folded out in the highest position. If the spray boom arms are folded out, the transport lock will be pulled back automatically by means of a steel cable system (E) connected to the spray boom arms (left and right). When the boom is folded out, the parallelogram (height adjustment) can be lowered to the desired spraying height. If the spray boom is folded in at the highest position, the transport hooks are pushed forward again. The spray boom can be lowered and the parallelogram (height adjustment) will be locked by the transport hooks. Also the outer boom segments will be locked if the folded boom is lowered. Please see also "Adjusting the spray boom transport position" in the section "Adjustments".
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WZ00085,0000361 -19-05SEP06-3/11 |
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Folding and unfolding with double folding booms
IMPORTANT: Never drive with the unfolded spray boom and the pendulum system locked, since serious damage may be caused to the spray boom and suspension. The spray boom is folded and unfolded hydraulically by means of two double-acting cylinders for each spray boom arm. Both spray boom arms are folded and unfolded simultaneously. A connecting rod (A) between both spray boom arms (left and right) ensures simultaneous folding, also when the sprayer is folded/unfolded on hills. The folding and unfolding speed is set with restrictors mounted on the cylinders. After the boom is folded in and lowered to the transport position, a boom lock device ensures that the outer boom segments are secured during road transport. For sprayers not equipped with drop hoses, the locking mechanism consists of a fixed support bracket underneath the boom (C).
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CAUTION:
Never fold/unfold the spray boom during driving, near obstacles or in the area of electrical power lines.
WZ00085,0000361 -19-05SEP06-4/11 |
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Folding and unfolding with triple folding booms
IMPORTANT: Never drive with the unfolded spray boom and the pendulum system locked, since serious damage may be caused to the spray boom and suspension. The spray boom is folded and unfolded hydraulically by means of three double-acting cylinders for each spray boom arm. The first and second spray boom arms are folded and unfolded simultaneously. A connecting rod (A) between both spray boom inner arms (left and right) ensures simultaneous folding and unfolding, also when the sprayer is folded/unfolded on hills. The outer spray boom arms can be folded independently from each other. The folding and unfolding speed is set with restrictors mounted on the cylinders. After the boom is folded in and lowered to the transport position, a boom lock device ensures that the inner (C) and outer boom segments (D) are secured during road transport.
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WZ00085,0000361 -19-05SEP06-5/11 |
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Boom folding/unfolding with folding boom tips
The folding and unfolding of the boom is operated by the EHC-2 control box. The electro-hydraulic control valve block is fitted on the rear of the parallelogram height adjustment, underneath a protective cover. The hydraulic hoses for the electro-hydraulic control must be connected to a single or double-acting selective control valve and a pressure-free return line. The appropriate control valve needs to be activated constantly to supply the electro-hydraulic control valve block with oil. Proceed as follows to unfold the spray booms: 1. Place the spray boom in its highest position by pushing switch 17 of the EHC-2 control box up. The pendulum lock needs to activated (LED ON).2. Unfold the left and right hand inner spray boom segments by pushing the switch 11 of the EHC-2 control box down. The inner boom segments will fold out. 3. Unfold the left and right hand outer boom segments by pushing down switch 13 (left) and switch 15 (right) of the EHC-2 control box. The outer boom segments left and right will fold out. 4. When the outer boom segments are folded out completely, the pendulum lock cylinder has to be unlocked. Set switch 12 of the EHC-2 control box in its upper position (LED OFF) to unlock the pendulum system. It takes about 10 seconds before the pendulum system is unlocked. Wait during this time period before operating any other functions ! 5. Lower the spray boom to the required spray boom height by pushing down switch 17 of the EHC-2 control box. Folding of the spray boom takes place in reverse order: |
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NOTE: If the machine is equipped with an automatic steering drawbar, the trailing drawbar needs to be set to central position and switch 22 and switch 23 need to be placed in manual position. 1. Place the unfolded spray boom in its highest position by pushing switch 17 of the EHC-2 control box up.2. Lock the pendulum system by setting switch 12 of the EHC-2 control box in its lower position (LED ON). It takes about 10 seconds before the pendulum system is locked. Wait during this time period before operating any other functions ! 3. Fold the left and right hand outer spray boom segments in by pushing switch 13 (left) and 15 (right) of the EHC-2 control box up. 4. Fold the left and right hand inner spray boom segments in by pushing switch 11 of the EHC-2 control box up. Both inner spray boom segments left and right will fold in simultaneously. When the boom is completely folded in, the transport hook for the parallelogram height adjustment will move forward. 5. Lower the folded spray boom by pushing down switch 17 of the EHC-2 control box until it rests on the transport support rolls and the transport hook of the parallelogram locks the height adjustment. The height adjustment can then not be lowered any further. |
WZ00085,0000361 -19-05SEP06-7/11 |
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Folding Boom Tips
IMPORTANT: Never drive with the unfolded spray boom and the pendulum system locked. Serious damage may be caused to the spray boom and suspension. The sprayer is fitted with independent folding and unfolding of the outer boom segments, to spray with a reduced working width (A). Please see also "Spray boom" in this section for the reduced working widths in the table with section divisions. Switches 13 and 15 need to be activated to fold in and out the outer boom segments simultaneously. Independent Folding Boom Tips
IMPORTANT: Spraying and driving with one outer boom segment folded in needs be done with the greatest caution, since the pendulum system is blocked. Drive slowly and avoid rough tracks or serious damage may be caused to the spray boom and suspension. The sprayer with electro-hydraulic control is fitted with independent folding and unfolding of the outer boom segments left/right, to spray along obstacles in the field. |
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WZ00085,0000361 -19-05SEP06-8/11 |
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The outer spray boom segments left and right can be folded in and out with switches 13 (left) and 15 (right) of the EHC-2 control box, after the inner boom segments are folded out. Before folding the outer boom segments in and out on one side, the (optional) steering drawbar needs to be set in the central position and the pendulum system has to be locked. This can be done by pushing switch 12 of the EHC-2 control box down (LED ON). It takes about 10 seconds before the pendulum system is completely locked. |
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Variable Geometry
Sprayers with electro-hydraulic control can be fitted with independent raising and lowering of the spray boom arms left and right (variable geometry). This can be used to spray in sloping and irregular fields to adjust the correct height of the nozzles above the ground. Two hydraulic cylinders are installed between the centre frame and the inner boom segments (A) left and right. The cylinders can be set in two different positions to the adjustable connection (B). If the bottom of the cylinders is connected to the rear slots, the boom arms can only be raised (up to 19°) and not be lowered below horizontal position. If the cylinder is completely out, the spray boom will be level when folded out. This is the preferred position if negative correction is not necessary. If the bottom of the cylinders is connected to the first slots, the boom arms can be raised (up to 12.5°) and lowered (up to 6.5°). In the middle stroke position of the cylinders, the spray boom will be level when unfolded. If the spray boom is folded out, the left and right spray boom arms can be raised by pushing switch 5 (left) and 7 (right) of the EHC-2 control box up. The boom arms can be lowered by pushing switch 5 (left) and 7 (right) of the EHC-2 control box down. Before folding in the spray boom, the left and right spray boom arms always have to be level.
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WZ00085,0000361 -19-05SEP06-10/11 |
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The variable geometry is equipped with accumulators (A) and adjustable restrictors (B). The speed of variable geometry can be adjusted with these restrictors to match spraying conditions. When the restrictors are turned clockwise the oil flow will be increased, when turning counter-clockwise the oil flow will be decreased. Both restrictors need to be equally adjusted.
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WZ00085,0000361 -19-05SEP06-11/11 |