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| Illustration 1 | g03788044 |
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Combined Function - Electric Control (1) Ball valve (2) Relief valve (3) Ball valve (4) Line (4) Line (6) Man control valve (7) Line relief valve (8) Line relief valve (9) Attachment control valve (10) Retract solenoid valve "A1" (11) Extend solenoid valve "A1" (12) Hydraulic lockout solenoid (13) Pilot Manifold (14) Distribution block (15) hydraulic tank (16) Main pump (17) Power shift solenoid valve | |
The work tool system is designed to allow complete electronic control over the tool control system. The combined function hydraulic system that is present on excavators that are equipped with a combined function combines the features of the one-way/two-way flow system with the one pump flow system.
Refer to Table 1 for the appropriate work tool and "TOOL#".
| Work Tool | Direction of Flow | Number of Pumps | "TOOL#s" |
|---|---|---|---|
| "Hammer" | 1 Way | 1 Pump | "TOOL#1" |
| "Grapple" | 2 Way | 1 Pump | "TOOL#2" |
The work tool can be operated by joysticks with modulation switches and joysticks with three buttons. Refer to Systems Operation, "Switches" for the Tool Control System for more information on the device for activation.
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| Illustration 2 | g03790690 |
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One-way flow from one pump (1) Ball valve (2) Relief valve (3) Ball valve (4) Line (5) Line (6) Man control valve (7) Line relief valve (8) Line relief valve (9) Attachment control valve (10) Retract solenoid valve "A1" (11) Extend solenoid valve "A1" (12) Hydraulic lockout solenoid (13) Pilot Manifold (14) Distribution block (15) hydraulic tank (16) Main pump (17) Power shift solenoid valve | |
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| Illustration 3 | g03792324 |
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Ball valves are shown in ONE-WAY position. (1) Ball valve (2) Relief valve (3) Ball valve | |
The default parameter values for one-way hydraulic oil flow from one main pump are shown in Table 1. Refer to Testing and Adjusting, "Combined Function - Electric Control: Default Value of Work Tool Parameters" for the Tool Control System.
Use the display monitor or CAT® ET in order to set the hydraulic flow to the work tool. Refer to Testing and Adjusting, "Work Tool Setup" section for the Tool Control System for more information.
Main pump (16) supplies oil to pilot manifold (13). When the hydraulic activation lever is moved to the UNLOCK position, solenoid valve (12) is activated. Pilot oil flows from pilot manifold (13) to solenoid valves (10) and (11).
When the device for activation is pressed, the machine ECU sends a signal to extend solenoid valve (11). Pilot oil flows to the bottom of attachment control valve (9). The pilot oil will shift the spool in attachment control valve (9) to the UPWARD position. This action allows oil from main pump (16) to flow through the valve. The pump oil flows through line (4) to the work tool. Return oil flows through line (5), through attachment control valve (9), and back to hydraulic tank (15).
The work tool pressure setting is regulated by relief valve (2). To view the parameters for the work tool, refer to Testing and Adjusting, "Combined Function - Electric Control: Default Value of Work Tool Parameters" for the Tool Control System.
During operation of the work tool, the machine ECU sends a signal to power shift solenoid valve (17). Pump flow in the center bypass passage is blocked when the control valve spools shift UPWARD and sends a load sense signal to pump regulator. The machine ECU has the following programmed parameter values: "Atch #1 Flow Setting", "Atch #1 Multi-Ope Add Flow" and "Atch #1 Nominal Press". The parameters control the flow and pressure of the work tool. The machine ECU and load sense signal regulates the pump flow control pressure that will be supplied to the pump regulator. The pump flow control pressure forces the swashplate in the pump to the correct angle to limit the flow and pressure to the work tool.
The default parameter values for two-way hydraulic oil flow from one main pump are shown in Table 1. Refer to Testing and Adjusting, "Combined Function - Electric Control: Default Value of Work Tool Parameters" for the Tool Control System.
Use the display monitor or CAT® ET in order to set the hydraulic flow to the work tool. Refer to Testing and Adjusting, "Work Tool Setup" section for the Tool Control System for more information.
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| Illustration 4 | g03790748 |
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Two-way flow from one pump (Extend) (1) Ball valve (2) Relief valve (3) Ball valve (4) Line (5) Line (6) Man control valve (7) Line relief valve (8) Line relief valve (9) Attachment control valve (10) Retract solenoid valve "A1" (11) Extend solenoid valve "A1" (12) Hydraulic lockout solenoid (13) Pilot Manifold (14) Distribution block (15) hydraulic tank (16) Main pump (17) Power shift solenoid valve | |
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| Illustration 5 | g03792341 |
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Ball valves are shown in TWO-WAY position. (1) Ball valve (2) Relief valve (3) Ball valve | |
Main pump (21) supplies oil to pilot manifold (13). When the hydraulic activation lever is moved to the UNLOCK position, solenoid valve (12) is activated. Pilot oil flows from pilot manifold (13) to solenoid valves (10) and (11).
When the device for activation is pressed, the machine ECU sends a signal to extend solenoid valve (9). Pilot oil flows to the bottom of attachment control valve (9). The pilot oil will shift the spool in attachment control valve (9) to the UPWARD position. This action allows oil from main pump (16) to flow through the valve. The pump oil flows through line (4) to the work tool. Return oil flows through line (5), through attachment control valve (9), and back to hydraulic tank (15). Refer to Illustration 4.
During operation of the work tool, the machine ECU sends a signal to pump regulator. Pump flow in the center bypass passage is blocked when the control valve spools shift UPWARD and sends a load sense signal to pump regulator. The machine ECU has the following programmed parameter values: "Atch #1 Flow Setting", "Atch #1 Multi-Ope Add Flow" and "Atch #1 Nominal Press". The parameters control the flow and pressure of the work tool. The machine ECU and load sense signal regulates the pump flow control pressure that will be supplied to the pump regulator. The pump flow control pressure forces the swashplate in the pump to the correct angle to limit the flow and pressure to the work tool.
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| Illustration 6 | g03790750 |
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Two-way flow from one pump (Retract) (1) Ball valve (2) Relief valve (3) Ball valve (4) Line (5) Line (6) Man control valve (7) Line relief valve (8) Line relief valve (9) Attachment control valve (10) Retract solenoid valve "A1" (11) Extend solenoid valve "A1" (12) Hydraulic lockout solenoid (13) Pilot Manifold (14) Distribution block (15) hydraulic tank (16) Main pump (17) Power shift solenoid valve | |
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| Illustration 7 | g03792341 |
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Ball valves are shown in TWO-WAY position. (1) Ball valve (2) Relief valve (3) Ball valve | |
Main pump (16) supplies oil to pilot manifold (13). When the hydraulic activation lever is moved to the UNLOCK position, solenoid valve (12) is activated. Pilot oil flows from pilot manifold (13) to solenoid valves (10) and (11).
When the device for activation is pressed, the machine ECU sends a signal to retract solenoid valve (10). Pilot oil flows to the bottom of attachment control valve (9). The pilot oil will shift the spool in attachment control valve (9) to the DOWNWARD position. This action allows oil from main pump (16) to flow through the valve. The pump oil flows through line (5) to the work tool. Return oil flows through line (4), through attachment control valve (9), and back to hydraulic tank (15). Refer to Illustration 6.
The work tool pressure setting is regulated by relief valve (2). To view the parameters for the work tool, refer to Testing and Adjusting, "Combined Function - Electric Control: Default Value of Work Tool Parameters" for the Tool Control System.
During operation of the work tool, the machine ECU sends a signal to pump regulator. Pump flow in the center bypass passage is blocked when the control valve spools shift DOWNWARD and sends a load sense signal to pump regulator. The machine ECU has the following programmed parameter values: "Atch #1 Flow Setting", "Atch #1 Multi-Ope Add Flow" and "Atch #1 Nominal Press". The parameters control the flow and pressure of the work tool. The machine ECU and load sense signal regulates the pump flow control pressure that will be supplied to the pump regulator. The pump flow control pressure forces the swashplate in the pump to the correct angle to limit the flow and pressure to the work tool.