ROD,PISTON 0934542 - Caterpillar

The On/Off solenoids include:
Swing brake solenoid
Travel speed solenoid
Straight travel solenoid
Hydraulic lock solenoid
Illustration 20 g03678894Note: The values in Table 12 are for bench testing only. Values may not represent parameters for machine systems specifications.
Table 12
Rated Voltage 24 VDC
Coil Resistance 22.4 1.0 Ω (T=20° C) The On/Off solenoid in Illustration 20 includes:
Swing Priority Solenoid
Boom Up Electric Check Solenoid Valve (If equipped with Smartboom)
Illustration 21 g03679000Note: The values in Table 13 are for bench testing only. Values may not represent parameters for machine systems specifications.
Table 13
Rated Voltage 24 VDC
Coil Resistance 24.0Ω (T=20° C) The On/Off solenoid in Illustration 21 includes:
Boom Down Electric Check Solenoid Valve (If equipped with Smartboom)Proportional Reducing Solenoid Valve
Illustration 22 g02703776Note: The values in Table 14 are for bench testing only. Values may not represent parameters for machine systems specifications.
Table 14
Current Range 0 mA ~ 700 mA
Coil Resistance 15.0 0.75Ω (T=20° C)
Illustration 23 g06126858
A - Port pressure (kPa) vs Current (mA)
The proportional reducing solenoid valve is used on machines equipped with tool control. The P-Port is blocked and does not allow pressure to the A-port. Therefore, the machine ECM must apply current to the PRV in order to sent pressure to the A-port of the PRV.The PRV's include:
Negative Flow Control 1 Limit PRV
Negative Flow Control 2 Limit PRV
Power Shift Pressure PRVReverse Proportional Reducing Solenoid Valve
Illustration 24 g02304374
Valve cutaway, hydraulic schematic symbol, and electrical connector designation
Note: The values in Table 15 are for bench testing only. Values may not represent parameters for machine systems specifications.
Table 15
Current Range 0 mA ~ 700 mA
Coil Resistance 15.0 0.75Ω (T=20° C)
Illustration 25 g02304414Reverse PRV's have the P-port open to the A-port with no current applied. Therefore, the machine ECM applies current to the PRV in order to decrease the pressure at the A-port.The reverse PRV's include:
Boom Regeneration PRV
Boom Down Solenoid (If equipped with Smartboom)Data Link
The data link is a controller network used to pass information back and forth. The data link is designed to carry communications between the various controllers and the monitor. The data link is not a visible component. The network consists of internal control circuits and a wiring harness. The data link is bidirectional. The controllers can receive information and send information. Two 120 Ohm terminating resistors must be installed in the wiring harness in order for each data link to function properly.An example of how the data link works would be the fuel level information. The fuel level sensor is connected to the switch panel. The switch panel then sends the fuel level information over the data link to the monitor. The monitor uses this information to display the fuel level.
Illustration 26 g06113868
Schematic of the data link circuit
Action Alarm
The action alarm SOUNDS in order to alert the operator when a high emergency condition is present. For example, the engine oil pressure decreases below a set value.Travel Alarm
The travel alarm SOUNDS in order to alert the area that the machine is moving.