RM-300 Reclaimer Mixer Power Train Caterpillar

Circuit Breaker Panel

Illustration 1	g01191767
Left Side of Machine (Behind Steps) (1) "CB8" (2) "CB7" (3) "CB15" (4) "CB13" (5) "CB12"

The circuit breaker panel is located on the left front of the machine under the ladder to the operator station.

The main breaker supplies power to the following circuit breakers:

• "CB3"

• "CB4"

• "CB7"

• "CB8"

• "CB9"

• "CB10"

When the main power relay is energized, power is available at circuit breakers "CB12" through "CB17".

Circuit breaker "CB8" (1) is rated at 10 amp. Circuit breaker "CB8" protects components in the backup alarm circuit.

Circuit breaker "CB7" (2) is rated at 15 amp. Circuit breaker "CB7" protects the engine ECM.

Circuit breaker "CB15" (3) is rated at 8 amp. Circuit breaker "CB15" protects the fan control module.

Circuit breaker "CB13" (4) is rated at 8 amp.

Circuit breaker "CB13" protects the following components:

• The display control panel

• The switches in the propel circuit

• The speed dial

Circuit breaker "CB12" (5) is rated at 8 amp. Circuit breaker "CB12" protects the machine ECM, the sensors, and the filter bypass switches. This circuit breaker also transfers power to the parking brake solenoid when the brake release switch is in the BYPASS position.

Under the Instrument Panel

Illustration 2	g01191775
Under Instrument Panel (6) Display control panel (7) 24-pin connector (8) 40-pin connector

Display control panel (6) is mounted to the instrument panel. The display control panel has 24-pin connector (7) and 40-pin connector (8) .

24 and 40-Pin Connectors

Illustration 3	g01191779

Terminal "10" of 40-pin connector (8) receives power from circuit breaker "CB13". The display control panel is grounded at terminal "9" of the 40-pin connector.

24-pin connector (7) of display control panel (6) receives input signals from the following components:

• Terminal "4" (road and work mode switch)

• Terminal "5" (traction control switch)

• Terminal "6" (load control switch)

• Terminal "7" (throttle switch in the HIGH position)

• Terminal "8" (throttle switch in the LOW position)

40-pin connector (8) of display control panel (6) receives input signals from the following components:

• Terminal "15" (rotor control switch in the ENGAGE position)

• Terminal "16" (rotor control switch in the DISENGAGE position)

• Terminal "28" (rear wheel assist switch)

Display control panel (6) broadcasts input signals to the machine ECM over the CAN data link.

The CAN data link terminals for the display control panel are connected to the following terminals of 40-pin connector (8) :

• Terminal "30" (CAN Low)

• Terminal "19" (CAN High)

• Terminal "20" (CAN Shield)

Left Side of the Engine

Illustration 4	g01191788
Left Side of Engine (9) Engine ECM (10) "J2" connector (11) "J1" connector

Engine ECM (9) is mounted to the left side of the engine.

Engine ECM (9) has two 70-pin connectors "J1" (11) and "J2" (10). The "J1" connector handles the input and output signals used by the propel system.

Engine ECM (9) receives battery power from "CB7" at the following terminals:

• "J1-48"

• "J1-52"

• "J1-53"

• "J1-55"

The engine ECM is grounded at the following terminals:

• "J1-61"

• "J1-63"

• "J1-65"

Software inside the ECM analyzes the input signals from the engine speed sensor and from the engine oil pressure sensor.

Engine ECM (9) monitors the logic ground from terminals "J1-61" through "J1-65" via the throttle relay at the following terminals:

• Terminal "J1-22" (the open condition of the relay)

• Terminal "J1-23" (the closed condition of the relay)

Engine ECM (9) transfers the engine information used in the propel system to the machine ECM through the CAN data link.

The CAN data link terminals for the engine ECM are connected to the following terminals on connector "JI" (11) :

• Terminal "J1-34" (CAN Low)

• Terminal "J1-50" (CAN High)

• Terminal "J1-42" (CAN Shield)

Engine ECM (9) also collects internal engine data. The engine ECM then configures and transmits some of this data to the machine ECM over the CAN data link.

When the load control system is activated, the machine ECM analyzes the following information from the engine ECM:

• Engine rpm

• Demand torque

• Actual torque

Front of Operator Platform (Right Side)

Illustration 5	g01191840
Front of Operator Platform (Right Side) (12) Machine ECM (13) "A" connector (14) "B" connector (15) Fan control module (16) Throttle relay (17) Backup alarm relay

The electrical compartment on the front wall of the operator platform contains machine ECM (12) and additional electric and electronic components which are used by the propel system.

The additional components are the following:

• Fan control module (15)

• Throttle relay (16)

• Backup alarm relay (17)

Machine ECM (12) controls the propel system. The machine ECM receives input signals from components around the machine which monitor machine operating conditions. System software compares the gathered input to information which is stored in the ECM's memory. The software evaluates the current conditions and then generates an output signal in order to control the propel system within set parameters.

Machine ECM (12) controls machine propel primarily using open loop logic.

The machine ECM monitors the following circuits which are closed loop:

• The engine speed sensor to determine whether the engine has started

• The wheel speed sensor to determine whether the machine is moving

• The steering angle sensor provides a signal which the software uses in order to uncouple the traction control system.

In normal operation, other than the machine ECM checking to determine if the engine has started and machine is moving, the control system is open loop. The operator controls the machine within the high range and low range settings of the machine software.

Note: Machine ECM (12) is programmed with self-diagnostic logic. Service information can be accessed using the diagnostic connector and/or an electronic service tool.

"A" and "B" Connectors

Machine ECM (12) has the following two 40- pin connectors:

• Connector "A" (13)

• Connector "B" (14)

The machine ECM receives power from circuit breaker "CB12" at terminals "A1" and "A18". The machine ECM is grounded at terminals "A6" and "A23".

Machine ECM Inputs

To control the propel system, the machine ECM gathers input signals from components at the following terminals:

• Terminal "A2" (parking brake switch in the RELEASE position)

• Terminal "A3" (parking brake switch in the ENGAGE position)

• Terminal "A15" (throttle switch in the HIGH position)

• Terminal "A21" (rotor service switch in the CLOSED position)

• Terminal "B1" (speed dial, pulse width modulated signal)

• Terminal "B2" (wheel speed, pulse width modulated signal)

• Terminal "B19" (front steering angle sensor, pulse width modulated signal)

• Terminal "B20" (propel lever sensor, pulse width modulated signal)

• Terminal "B23" (forward propel lever switch in the CLOSED position)

• Terminal "B24" (reverse propel lever switch in the CLOSED position)

In order to control the propel system, machine ECM (12) also gathers input signals from components around the machine.

The input signals are sent over the CAN data link through the following terminals of connector "B":

• Terminal "B7" (CAN Low)

• Terminal "B8" (CAN High)

• Terminal "B13" (CAN Shield)

Machine ECM (12) also gathers input signals from the following components on the display control panel:

• Traction control switch

• Shift switch

• Throttle switch (HIGH position)

• Throttle switch (LOW position)

• Load control switch

• Rear wheel assist switch

• Rotor control switch (ENGAGE position)

• Rotor control switch (DISENGAGE position)

These signals are sent over the CAN data link.

Machine ECM (12) also gathers input signals from additional components over the CAN data link from the engine ECM that include engine oil pressure and engine speed. The engine oil pressure signal is used by the machine ECM to determine if the engine has started.

Machine ECM (12) software analyzes all of these inputs and determines if an output signal should be sent to the various hydraulic control solenoids.

Machine ECM Outputs

In order to control the propel system, machine ECM (12) provides output signals from the following terminals:

• Terminal "A5" (rear propel reverse EDC)

• Terminal "A11" (front wheel motor shift solenoid)

• Terminal "A12" (rear propel forward EDC)

• Terminal "A16" (parking brake solenoid)

• Terminal "A20" (front propel reverse EDC)

• Terminal "A24" (front propel forward EDC)

• Terminal "B22" (sensor ground)

The rear flow divider solenoid output signal is sent by the fan control module over the CAN data link. The rear freewheel valve output signals are sent by the fan control module over the CAN data link. The rear propel components are only present on machines equipped with optional all wheel drive.

Fan Control Module

Fan control module (15) takes input from the machine ECM over the CAN data link. The fan control module provides output when the traction control feature is engaged. The output electrical control signal of the engaged traction control feature is sent to the front flow divider and rear flow divider. The rear flow divider is only present on machines equipped with the optional all wheel drive.

Fan control module (15) has an 18-pin connector. Terminal "A1" of the fan control module receives power from circuit breaker "CB15". The fan control module is grounded at terminal "A3".

The fan control module communicates with the machine ECM through the CAN data link at the following terminals:

• "F1" (CAN Low)

• "F2" (CAN High)

• "F3" (CAN Shield)

If the machine ECM determines that the front flow divider solenoid or the optional rear flow divider solenoid should be energized, a signal is generated at terminal "E3" of the fan control module. Likewise, if the machine ECM determines that the rear freewheel solenoid should be energized, a signal is generated at terminal "B2" of the fan control module. Energizing the rear freewheel solenoid actuates the optional rear wheel drive.

Throttle Relay

Throttle relay (16) completes one of two possible computer logic circuits within the engine ECM. The display control panel monitors the throttle switch. Throttle switch status is transmitted to the machine ECM over the CAN data link to the machine ECM. By controlling the position of the throttle relay, the machine ECM controls the routing of a logic circuit within the engine ECM.

The engine ECM logic circuits through throttle relay (16) are initiated by the machine ECM based on the position of the throttle control switch and the other conditions imposed by machine ECM (12). The condition of the throttle switch is monitored by the display control module and broadcast to the machine ECM over the CAN data link.

Throttle relay (16) is not energized when the control circuit is open. In the open control circuit condition, terminals "30" and "87a" of the relay are closed. When terminals "30" and "87a" are closed, the circuit is complete between engine ECM ground and engine ECM terminal "23". The completed circuit between engine ECM ground and engine ECM terminal "23" is the machine LOW low speed condition in the machine and engine ECM's.

When the HIGH throttle speed signal is initiated by machine ECM (12), the machine ECM delivers a positive voltage control signal to throttle relay (16) terminal "86". The ground at terminal "85" and the positive voltage at terminal "86" pull the throttle relay control circuit closed. Then the throttle relay allows the engine ECM ground signal at terminal "30" to complete the circuit at terminal "87" which corresponds to the complete circuit between the engine ECM ground and engine ECM terminal "22". The completed circuit between the engine ECM ground and engine ECM terminal "22" is the machine HIGH throttle speed condition in the machine and engine ECM's.

Backup Alarm Relay

Backup alarm relay (17) supplies power to the backup alarm. The backup alarm is located in the rear of the machine. Circuit breaker "CB8" distributes power to contact "30" of the backup alarm relay. Contact "87" of the backup alarm relay is connected to the backup alarm. The coil of the backup alarm relay is controlled by the propel lever reverse switch. When the reverse switch is closed, terminal "86" is energized. When terminal "86" is energized, the coil of the relay pulls the circuit between terminals "30" and "87" closed and current is directed to the backup alarm.

Backup Alarm

Illustration 6	g01192004
Backup Alarm (Rear of Machine) (18) Backup Alarm

Backup alarm (18) is located at the rear of the machine, directly above the rear steering cylinder. Terminal "1" of the backup alarm receives power from the gate of the backup alarm relay. The backup alarm is grounded at terminal "2". When the propel lever is in the reverse range, the backup alarm sounds.

Front Steering Sensor

Illustration 7	g01192007
Left Front Wheel (19) Front steering sensor (under cover) (20) Actuator (21) Index rod

Front steering sensor (19) is located under a protective cover near the left front wheel. The cover protects the sensor from debris. Index rod (21) moves proportionally to the steering angle of the front wheel. Movement of the index rod causes actuator (20) to rotate the input shaft of the front steering sensor.

Circuit breaker "CB12" distributes power to contact "A" of the front steering sensor. Contact "B" of the sensor is grounded through the common sensor ground of machine ECM (12). Contact "C" of the sensor provides a pulse width modulated signal to terminal "B19" of the machine ECM. The duty cycle of the pulse width modulated signal is proportional to the steering angle of the front wheels. The machine ECM uses information from the front steering sensor as an input to the traction control logic. When the steering angle exceeds a preset maximum value, the machine ECM de-energizes the flow divider solenoid.

Wheel Speed Sensor (Left Front Wheel)

Illustration 8	g01192011
Wheel Speed Sensor (Left Front Wheel) (22) Front wheel speed sensor

Front wheel speed sensor (22) is mounted in the housing of the left front wheel. Circuit breaker "CB12" distributes power to contact "A" of this sensor. Contact "B" of the sensor is grounded through the common sensor ground of machine ECM (12). Contact "C" of the sensor provides a pulse signal to terminal "2B" of the machine ECM.

Machine ECM (12) uses information from the front wheel speed sensor as an input in order to determine the following conditions:

• If the cut out speed traction control logic has been reached

• If the machine is in motion.