V-BELT SET 8T4102 - Caterpillar

Note: The values in Table 4 are for bench testing only. Values may not represent parameters for machine systems specifications.
Table 4
Operating Pressure 50 MPa
Supply Voltage +7V ~ +14V
Output Signal 500 100 Hz (PWM)
Output Range 5% ~ 95% Boom Cylinder Head End Pressure Sensor
Boom cylinder head end pressure sensor measures the hydraulic pressure on the head end of the boom cylinder. The pressure sensors send a pulse width modulated signal (PWM) input to the machine ECM. The pressure information is used for boom regeneration control.Drive Pump Pressure Sensor and Idler Pump Pressure Sensor
The drive pump pressure sensor and idler pump pressure sensors are inputs to the machine ECM. The drive pump and idler pump pressure sensors are located on the main control valve. The drive pump pressure sensor monitors the pressure of the drive pump oil in the front half of the main control valve high-pressure passages. The idler pump pressure sensor monitors the idler pump oil pressure in the rear half of the main control valve high-pressure passages.The pressure sensors send a pulse width modulated (PWM) input to the machine ECM. This pressure information is used for pump control and travel speed.Outputs
The ECM responds to decisions by sending electrical signals to the outputs. The outputs can create an action or the outputs can provide information to the operator or the service technician.On/Off Solenoids
Illustration 7 g01158530Note: The values in Table 5 are for bench testing only. Values may not represent parameters for machine systems specifications.
Table 5
Rated Voltage 24 VDC
Coil Resistance 41.5 2.1Ω (T=20° C) Hydraulic Lock Solenoid
The hydraulic lock solenoid is an output of the Machine 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.This solenoid is activated while the key switch is in the ON position and the hydraulic lock lever is in the UNLOCK position.Proportional Reducing Solenoid Valve
Illustration 8 g02703776Note: The values in Table 6 are for bench testing only. Values may not represent parameters for machine systems specifications.
Table 6
Current Range 0 mA ~ 700 mA
Coil Resistance 15.0 0.75Ω (T=20° C) Power Shift Pressure PRV
The power shift pressure PRV is used to destroke the main pump under load to maintain engine speed. The main functions of the PRV, in conjunction with, the monitoring system, are listed below:
The PRV manages the transfer to engine power into hydraulic power as needed.
The system control the output of the pump according to the workload, improving fuel efficiency.Negative Flow Control 1 Limit PRV and Negative Flow Control 2 Limit PRV
Two proportional reducing valves for negative flow control are used to control the amount of NFC signal to the pump regulators. The machine ECM receives various input signals to control the flow limitation from the main hydraulic pumps. When the NFC valves are energized by the machine ECM, pilot oil pressure is directed to the main hydraulic pump regulators from the pilot manifold. The pilot oil pressure causes the hydraulic pumps to