The system is made up of a machine controller and flow control proportional reducing valves. The system also performs flow control against parallel circuits and reduction horsepower control of the main pump when an ATT pump is in use.
The machine ECU can hold programs for ten different tool settings. Control parameters for a maximum of four different spools are included in one type of tool setting. The control parameters contain not only the oil flow, but also the engine speed and the output limit value for the main pumps. One or two pump change over for hydraulic hammer and one or two-way flow change over are performed automatically by control parameters.
The tool control system is set by the factory and stored in the ECU. The default parameters of the work tool that can be changed are explained for each tool control system.
The machine configuration is determined by the valve control circuit on the machine. The tool parameter setting is dependent upon the machine configuration setting. The tool control system should only be changed on the monitor or with Cat® Electronic Technician if certain components on the machine are changed first.
The correct "TOOL#" must be selected during the operation of the work tool. Parameters for the "TOOL#" must be properly programmed. Refer to the specifications of the manufacturer in order to set the parameters of the "TOOL#".
The component configurations for each of the tool control systems are described in Table 1.
| Identification for the Tool Control System | |||||
|---|---|---|---|---|---|
| Tool Control System | Engineering Nomenclature | Machine Application(1) | Control Device | Tool Relief Valve | Comparable E-Series Tool Control System |
| One-Way / One or Two Pump - Hydraulic Control | Configuration 1 | "Hammer - Hydraulic" | Hydraulic Pedal | Mechanical | Tool 11 |
| Combined Function - Hydraulic Control | Configuration 2 | "Common - Hydraulic" | Hydraulic Pedal | Electric | Tool 10 |
| Combined Function - Electric Control | System 23 | "Common - Electrical" | Electric Control(2) | Electric | Tool 20 |
| Medium Pressure | Medium Pressure | "Auxiliary Pump - Electrical" | Electric Control(2) | Mechanical | Medium Pressure |
| (1) | Monitor Setup Option > "Service" > "Configurations" > "Aux Hyd Attachment" > "Machine Application" |
| (2) | Joystick with Thumb Wheel, Electric Foot Pedal |
The tool systems can be identified based on the number and type of components on the machine.
A machine configured with Configuration 1 will offer One-Way flow from One or Two Pumps with Hydraulic Control. Configuration 1 will have the following components:
- One mechanical relief valve located in the swing motor compartment above the boom foot.
- One or Two pump flow solenoid located in the swing motor compartment
- Hydraulic foot pedal in the cab
Refer to Illustrations 2, 2, and 3 for component descriptions.
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| Illustration 1 | g03648837 |
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Mechanical tool relief is located above the boom foot | |
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| Illustration 2 | g03637161 |
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One or Two pump flow solenoid is located in swing motor compartment (cab side) | |
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| Illustration 3 | g02722605 |
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Hydraulic foot pedal is located in the cab | |
A machine configured with Configuration 2 will offer Combined Function with Hydraulic Control. Configuration 2 will have the following components:
- Two variable relief valves located in the swing motor compartment above the boom foot.
- Two solenoids in the swing motor compartment by the cab
- Hydraulic controls in the cab
Refer to Illustrations 7, 5, and 6for component descriptions.
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| Illustration 4 | g03648897 |
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Two variable reliefs are located above the boom foot | |
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| Illustration 5 | g03637298 |
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Solenoid valves located in the swing motor compartment (cab side) | |
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| Illustration 6 | g02722595 |
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Hydraulic foot pedals located in the cab | |
A machine configured with System 23 offers Combined Function with Electric Control. System 23 will have the following components:
- Two variable relief valves located in the swing motor compartment above the boom foot.
- Two proportional reducing valves to control the attachment control valves located in the swing motor compartment.
- Electric controls in the cab
Refer to Illustrations 7, 8, and 9 for component descriptions.
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| Illustration 7 | g03648897 |
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Two variable reliefs are located above the boom foot | |
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| Illustration 8 | g03621416 |
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Two proportional reducing valves are located in the swing motor compartment | |
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| Illustration 9 | g03648387 |
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Electric controls in the cab (A) Joysticks with Thumb wheel | |
Medium Pressure Hydraulic System
A machine configured with a Medium Pressure system will have the following components:
- Medium Pressure control valve located in the swing motor compartment.
- Two proportional reducing valves located in the swing motor compartment
- Electric control in the cab.
Refer to Illustration 10 and 9 for component descriptions.
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| Illustration 10 | g03637462 |
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Medium pressure valve with proportional reducing valves for control located in the swing motor compartment | |
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| Illustration 11 | g02722564 |
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Left Joystick with Thumb wheel | |