One-way flow from one pump can be achieved by selecting a work tool that requires one-way flow from one pump. The work tool can be selected through the monitor or by the work tool select switch. A typical example is a hammer that receives oil from one pump only. This operation allows oil to flow directly to the oil cooler and through the main control valve. The return of oil directly to the cooler will allow for a higher flow of oil with the reduction of resistance by bypassing the main control valve.
When one pump flow is required to the work tool, the pump supplying the oil can be programmed through the monitor.
Reference: Refer to Testing and Adjusting, "Work Tool Parameter - Program" for the tool control system to change the settings for work tool operation.
Reference: Refer to Testing and Adjusting, "One-Way/One Pump - Default Value of Work Tool Parameters" for the Tool Control System to reference the factory settings.
| Operation Lever List | |
|---|---|
| Control | Extension |
| Left Hand Joystick Switch 3 | Press Switch |
| Electric Foot Switch | Press Switch |
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| Illustration 1 | g06611252 |
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One-Way Flow from One Pump (1) Hydraulic oil cooler (2) Pilot pressure reducing valve (3) Main control valve (4) Main relief valve (5) Line relief valve (Auxiliary 1) (6) Hydraulic lock solenoid (7) Pump 2 output pressure sensor (8) Pump 1 output pressure sensor (9) Attachment control valve (10) Proportional reducing valve (A1 extend) (11) f2 stack valve (12) Attachment return filter (13) Hydraulic tank (14) Pump 1 control solenoid (15) Pump 1 (16) Pump 2 (17) Pump 2 control solenoid | |
When the device for activation listed in Table 1 is pressed, the machine ECM sends a modulated signal to proportional reducing valve (10). Proportional reducing valve (10) allows pilot oil to flow to the attachment control valve (11), allowing high-pressure oil from pump 1 (15) to flow to the work tool.
The oil returning from the work tool flows through attachment return filter (12) to oil cooler (1) and back to hydraulic tank (13).
During the operation of the work tool, the oil flow for pump 1 (15) is controlled by the machine ECM.
Work Tool Parameters - Control Functions
The following items are provided as an overview of the common functions and features that can be set for the work tools using the monitor. Once a work tool is selected, control function parameters such as engine speed control and pump flow control are changed together.
Parameter #1
This feature allows the image of the work tool that will be displayed within the monitor.
Parameter #2
This feature allows the MAC address of PL-161 for work tool recognition.
Parameter #3
This feature allows the user to set the name of the work tool that will be displayed with the monitor.
Minimum Throttle Dial Position
Parameter #4
The lower limits of the engine speed can be set at minimum throttle dial position when the work tool is operated. This setting will allow a stable supply of hydraulic oil to the work tool.
This feature is disabled if the engine speed dial lower limit is set to 1.
Parameter #5
The operator can enable or disable Eco mode for the machine when the tool is in operation.
Parameter #6
The operator can enable or disable Smart mode for the machine when the tool is in operation.
Parameter #7
The operator can select Pump #1, Pump #2 or Combined Flow for the machine when the tool is in operation.
Parameter #8, #9, #10
This function automatically provides the appropriate output flow and auxiliary pilot pressure command during multi-function operations.
The follow parameters will not need to be adjusted during Auto Spool Control Function:
- Tool Program Attachment Valve #1 Multi-Operation Additional Flow
- Multiple Operation Maximum Extend Pilot Pressure for Attachment Valve #1
- Multiple Operation Maximum Retract Pilot Pressure for Attachment Valve #1
- Multiple Operation Maximum Extend Pilot Pressure for Attachment Valve #2
- Multiple Operation Maximum Retract Pilot Pressure for Attachment Valve #2
The following parameter settings are recommended for auto spool control function mode:
- Tool program pump flow control mode - Combined Flow
- Enhanced multi operation attachment valve limit enable status - Enabled
This function cannot guarantee flow accuracy during multi operation. If excess or insufficient flow rate through the tool line is observed, adjust the following parameters according to each operation:
- Tool Program Multi-Function with Combined Attachments Automatic Extend Operation Setting
- Tool Program Multi-Function with Combined Attachments Automatic Retract Operation Setting
Note: Target valves are only for attachment valves 1 and 2. Parameter setting does not affect attachment valve 1 one-way mode.
Raising this parameter increases the attachment valve pilot pressure and oil flow through the tool line.
Lowering this parameter decreases the attachment valve pilot pressure and oil flow through the tool line.
Tool Program Display Enable Status Function
Parameter #15
This function is used to read and program the status of the display to the work tool select menu. This function can be enabled or disabled. The default setting of this parameter is enabled.
Hammer Indicator Enable Status Function
Parameter #16
This function provides a 15 second indicator for a hammer operation. Once the hammer operation is started, the indicator will count down to 15 seconds. This function can be enabled or disabled. The default setting of this parameter is enabled.
For supplemental information on the hammer indicator enable status function, refer to the following video.
Note: A CWS login is required to access AVSpare Channel1. Scan the following QR code with a QR enabled device or copy the link that follows.
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| Illustration 2 | g06348094 |
Reference: For more information, refer to "Next Gen Tool Control - Hammer Only Settings" on AVSpare Channel1.
https://channel1.mediaspace.kaltura.com/media/Next+Gen+Tool+Control+-+Hammer+Only+Settings+%28Video+6%29/1_g9eht4f1Hammer Auto Stop Enable Status Function
Parameter #17
The hammer excessive activation auto stop feature improves the service life of hammer work tools by monitoring the time a hammer is continuously being activated. When this feature is enabled, the monitor will display a warning massage after 15 seconds of continuous activation of a hammer. If the operator exceeds 30 seconds of continuous activation, the hammer will automatically stop. The default setting of this parameter is enabled.
Parameter #19
Temperature to display a hydraulic oil warning can be set in the parameters for each work tool to be installed.
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| Illustration 3 | g06612164 |
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3 button joysticks (1) Left Hand Joystick Switch 3 | |
The work tool operates when the switch is depressed. When the switch is pressed, a signal is sent to the machine ECM. The machine ECM sends a signal to the solenoids to control the attachment control valves for one-way flow to the work tool. When the switch is released, the machine ECM discontinues power to the solenoids. The work tool stops operating.
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| Illustration 4 | g01148800 |
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Foot switch (electric) and electrical harness | |
This pedal is a momentary on/off switch.
The work tool operates when the switch is pressed. When the switch is pressed, a signal is sent to the machine ECM. The machine ECM sends a signal to the solenoids to control the attachment control valves for one-way flow to the work tool. When the switch is released, the machine ECM discontinues power to the solenoids. The work tool stops operating.
Activation of the Work Tool (Foot Switch)
The work tool operates when the switch is depressed. When the switch is pressed, a signal is sent to the machine ECM. The machine ECM sends a signal to the solenoids to control the attachment control valves for one-way flow to the work tool. When the switch is released, the machine ECM discontinues power to the solenoids. The work tool stops operating.
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| Illustration 5 | g06611272 |
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The attachment valve is located on the main control valve (typical example) | |
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| Illustration 6 | g06612240 |
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On/Off Solenoid Valve, hydraulic schematic symbol, and electrical connector designation | |
Note: The values in Table 2 are for bench testing only. Values may not represent parameters for machine systems specifications.
| Rated Voltage | 18 – 32 VDC |
| Coil Resistance | 32.5± 5 Ω (T=20° C) |