FRAME AS-FRONT 5326853 - Caterpillar

Illustration 6 g02332474Note: The values in Table 6 are for bench testing only. Values may not represent parameters for machine systems specifications.
Table 6
Activation Pressure 490 49 kPa (71 7 psi)
Deactivation Pressure 294 kPa (43 psi) MIN
Rating + 12V ~ +32V
0.01 Amp to 1 Amp
Pressure Range 0 to 10 MPa Left Travel Pressure Switch and Right Travel Pressure Switch
The left travel pressure switch and right travel pressure switch detects a travel operation. The travel pressure switches send an input signal to the machine ECM. The machine ECM uses the switch information to control the engine speed and pump control.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 7 are for bench testing only. Values may not represent parameters for machine systems specifications.
Table 7
Rated Voltage 24 VDC
Coil Resistance 32.0 3.2Ω (T=20° C) Travel Speed Solenoid
The travel speed solenoid is an output of the Machine ECM. When the travel speed solenoid is active, the machine can travel at high speed. The travel speed solenoid is active when the travel speed mode switch is set to "RABBIT (high)" mode. The travel speed also depends on the delivery pressure of the main pump. If the delivery pressure of the main pump is high, the travel speed solenoid is de-energized. When the delivery pressure of the main pump is low, the travel speed solenoid is energized.Straight Travel Solenoid
The straight travel solenoid is energized to maintain straight travel even though a swing operation or implement operation is performed during travel.The straight travel solenoid ensures straight travel of the machine when other circuits are operated during travel. The machine ECM recognizes the input status of the right travel pressure switch, left travel pressure switch, and the implement pressure switch. When all three pressure switches are activated to the ON position, the machine ECM activates the straight travel solenoid. Straight travel is now maintained.For more information on the straight travel solenoid, refer to Systems Operation, "Control Valve (Straight Travel)".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 8 are for bench testing only. Values may not represent parameters for machine systems specifications.
Table 8
Current Range 0 mA ~ 700 mA
Coil Resistance 11.5 0.5Ω (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.
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