Operation of Hydraulic FunctionsThe hydraulic functions of the sprayer are operated electro-hydraulically. After disconnecting the hoses, always fit protective caps on the couplings to prevent contamination, and hang the hydraulic hoses in their stowage point (A) on the front side of the sprayer.
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WZ00232,0000010 -19-12OCT06-1/7 |
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Electro-hydraulic operation
IMPORTANT: If oil is pumped through the electro-hydraulic control valve(s), the (EHC-2) control box must always be switched on to avoid overloading. The electro-hydraulic operation system enables operation of all hydraulic sprayer functions via an electrical control box (EHC-2) in the tractor cab. For this purpose an electro-hydraulic control valve block (A) with one single-acting control valve and one pressure-free return is mounted on the sprayer. In addition, a so-called OC/CC valve is fitted to the electro-hydraulic control valve block. The electro-hydraulic control valve(s) are suitable for closed center tractor hydraulics (continuous pressure system), open center tractor hydraulics (continuous volume system) and tractors with load sensing (optional load sensing kit on sprayer required). The electro-hydraulic control valve(s) are suitable for tractors with a pump capacity of up to 50 l/min. The control valve block is fitted with a combined flow control valve and safety valve (set to 180 bar). All electro-hydraulic control valves are fitted with controlled non-return valves to prevent drifting of the hydraulic cylinders. A reducing valve ensures very gradual folding/unfolding of the spray boom. If an obstacle is struck during folding/unfolding the possibility of damage to the spray boom is greatly reduced due to the lower operating pressure (approx.70 bar). |
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Tractor hydraulic system options
The correct hydraulic system used on the tractor has to be set in the GreenStar 2 sprayer control system in "Machine Settings" in the tab "General Settings": 1.
Press softkey "H" for "Machine Settings" from the menu field on the GreenStar 2 terminal.
IMPORTANT: Select "OPEN CENTER" if the sprayer is equipped with BoomTrac and connected to the Load Sensing system. Also see "Machine Settings" in section "GreenStar 2™ Sprayer Control System". The control valve block is fitted with a delivery and return line with quick release couplings. After disconnecting the hoses, always fit protective caps on the couplings to prevent contamination and hang the hoses in the respective slots on the front side of the sprayer. The tractor must be equipped with a delivery connection and a pressureless return. The delivery connection is provided with a red protective cap; the return line is provided with a blue protective cap. |
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Adjustment of Hydraulic Flow Divider
When using open center hydraulics, the flow divider (A) should be completely open. Turn the regulating valve (B) counter-clockwise to open the valve. When using closed center hydraulics, the flow divider (A) should be completely closed. Turn the regulating valve (B) clockwise to close the valve. When using load sensing hydraulics, the flow divider (A) should be completely closed. Turn the regulating valve (B) clockwise to close the valve. |
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Load Sensing Hydraulics
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When the tractor is equipped with power beyond couplers connect the load sensing system from the sprayer to the tractor. See also Tractor Operator's Manual. The hydraulic oil pressure and volume will be adjusted to the machines requirements. The pressure connection "P" (red protective cap) needs to be connected to the tractor's power beyond connection. The return line "T" (blue protective cap) must be connected to the tractor's pressure-free return. The load sensing male connection "LS" (yellow protective cap) needs to be connected to the tractor's load sensing connection. IMPORTANT: For transport, the load sensing line should always be closed using the manual operated valve. If the handle is in vertical position, the valve is open. NOTE: Due to differences in the outside temperatures the viscosity of the oil can be different when starting work. With a low oil viscosity it can occur that the hydraulic functions cannot be operated immediately when starting the tractor. This problem is solved when the viscosity (temperature) of the oil is increasing. |
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WZ00232,0000010 -19-12OCT06-6/7 |
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Emergency Manual Operation of Electro-Hydraulic Control Valves
The electro-hydraulic control valves have been fitted with emergency manual controls. This allows for operation of the necessary functions to fold the boom in transport position by using a pen or screwdriver in the case of electrical problems. One or two valves (A) must be operated simultaneously for this purpose, namely:
To operate the electro-hydraulic valves via the emergency manual control first remove the protective caps "A". The manual operation of the height adjustment can be done by removing the clip "C", other functions can be activated by using a pen or screwdriver Tractors with an OC hydraulic system do not generate pressure until the OC/CC valve is in operation. This can also be done by disconnecting the plug from the coil of the OC/CC valve. Stickers have been attached to the cables to the various magnetic coils to indicate the function in question. The symbols correspond with the symbols used on the control box. The meaning of the function in question is described in "Control Boxes" in section "Operation of the machine". In addition, the various functions of the control valves can be found on the electrical controls diagram provided in the receiver boxes of the machine. |
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WZ00232,0000010 -19-12OCT06-7/7 |