EXTENSION GP-EXHAUST 2873008 - Caterpillar

Pump Pressure Solenoid
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"Power Shift Pressure" Solenoid (Proportional)The pump pressure solenoid is an output of the Hydraulic Pump ECM. The solenoid is a three-port pressure reducing valve. The solenoid is the proportional type. The ECM uses a pulse width modulated signal (PWM) to vary the current that is sent to the solenoid. The distance that is travelled by the solenoid valve is proportional to the electrical current. The position of the valve opens or the position of the valve blocks the flow of oil to the pump. When the solenoid is de-energized the flow of the oil is blocked. The blocked oil flow causes the pump to destroke.Solenoid (ON/OFF)
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"Travel Speed Change" SolenoidSwing Brake SolenoidHydraulic Lock Solenoid"Travel Speed Change" Solenoid
The solenoid for "Travel Speed Change" is an output of the Hydraulic Pump ECM. The solenoid for "Travel Speed Change" sets the travel speed of the machine. The travel speed depends on the delivery pressure of the main pump. If the delivery pressure of the main pump is high, the solenoid for "Travel Speed Change" is de-energized. When the delivery pressure of the main pump is low, the solenoid for "Travel Speed Change" is energized. Swing Brake Solenoid
The swing brake solenoid is an output of the Hydraulic Pump ECM. The swing brake solenoid is energized in order to release the swing brake. The swing brake solenoid is de-energized approximately 6.5 seconds after any lever is moved to NEUTRAL position, except the travel levers/pedals. Hydraulic Lock Solenoid
The hydraulic lock solenoid is an output of the Hydraulic Pump ECM. The hydraulic lock solenoid is energized in order to enable the primary hydraulic pressure. The hydraulic lock solenoid is de-energized in order to disable the primary hydraulic pressure.Auto Reverse "Radiator Fan" Solenoid
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Auto Reverse "Radiator Fan" Solenoid (1) Solenoid (2) Hydraulic Schematic"Flow Limit" Solenoid
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"Flow Limit" Solenoid (1) Solenoid (2) Schematic SymbolWhen the grapple function is activated (by the use of the bucket lever), the electronic proportional reducing valve is energized in order to limit the pump flow. The limit is set by use of the parameters that are preset for the configuration of the tool."1P-2P Exchange 1" Solenoid
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"1P-2P Exchange 1" SolenoidThe "1P-2P Exchange 1 " solenoid is located at the center core of the machine at the top of the main hydraulic pump."1P-2P Exchange 2" Solenoid, "Heavy Lift," Solenoid
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"1P-2P Exchange 2" Solenoid, "Heavy Lift" SolenoidThe "1P-2P Exchange 2 " solenoid and the "Heavy Lift" solenoid are located at the center core of the machine at the top of the main hydraulic pump.