Solenoids
Auxiliary One Solenoid
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| Illustration 1 | g02905816 |
(1) Work Tool Coupler Dump Solenoid (1) Work Tool Coupler Rackback Solenoid (3) Lift Arm Lower Solenoid (4) Lift Arm Raise Solenoid (5) Auxiliary one Solenoid (6) Auxiliary two Solenoid | |
The auxiliary one solenoid is located on the implement valve.
Actuation of the Auxiliary one solenoid allows hydraulic oil to flow in the reverse direction to the female auxiliary coupling. The solenoid has a connector with two contacts. The solenoid ground is connected to the ECM through contact J1-60. The signal contact is connected to the ECM through contact J1-59.
Auxiliary two Solenoid
The auxiliary two solenoid is located on the implement valve. Refer to Figure 1
Actuation of the Auxiliary two solenoid allows hydraulic oil to flow in the forward direction to the male auxiliary coupling. The solenoid has a connector with two contacts. The solenoid ground is connected to the ECM through contact J1-60. The signal contact is connected to the ECM through contact J1-61.
Lift Arm Raise Solenoid
The Lift Arm Raise solenoid is located on the implement valve. Refer to Figure 1
The solenoid has a connector with two contacts. The solenoid ground is connected to the ECM through contact J1-55. The signal contact is connected to the ECM through contact J1-67. When the right joystick is in the rearward direction during normal mode (Cat control pattern, the loader lift arms will raise. When the left joystick is in the left direction during pattern changer mode (Alternate control pattern), the loader lift arms will raise.
Lift Arm Lower Solenoid
The Lift Arm Lower solenoid is located on the implement valve. Refer to Figure 1
The solenoid has a connector with two contacts. The solenoid ground is connected to the ECM through contact J1-55. The signal contact is connected to the ECM through contact J1-68. When the right joystick is in the forward direction during normal mode, the loader lift arms will lower. When the left joystick is in the right direction during the pattern changer mode, the loader lift arms will lower.
Work Tool Coupler Rackback Solenoid
The Work Tool Coupler Rackback solenoid is located on the implement valve. Refer to Figure 1
The solenoid has a connector with two contacts. The solenoid ground is connected to the ECM through contact J1-55. The signal contact is connected to the ECM through contact J1-65. When the right joystick is in the left direction, the bucket will rack.
Work Tool Coupler Dump Solenoid
The Work Tool Coupler Dump solenoid is located on the implement valve. Refer to Figure 1
The solenoid has a connector with two contacts. The solenoid ground is connected to the ECM through contact J1-55. The signal contact is connected to the ECM through contact J1-66. When the right joystick is in the right direction, the loader lift arms will lower.
Demand Fan Solenoid
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| Illustration 2 | g02754137 |
(1) Demand Fan Solenoid | |
The solenoid has a connector with two contacts. The solenoid ground is connected to the ECM through contact . The signal contact is connected to the ECM through contact . The solenoid has a connector with two contacts. The sensor ground is connected to the ECM through contact J1-60. The signal contact is connected to the ECM through contact J1-62. The fan speed is reduced to minimum when the temperature of the engine coolant and the hydraulic oil is low. When the temperature reaches a certain level, the fan speed increases to provide more system cooling. If the temperature does not decrease, the fan speed is gradually increased until the temperature returns below the target temperature. If the signal is open, the fan will run to maximum.
Left Pump Forward Solenoid
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| Illustration 3 | g02754141 |
Two Speed SSL Hystat Solenoids. (1) Right Reverse Drive Pump Solenoid (2) Right Forward Drive Pump Solenoid (3) Left Forward Drive Pump Solenoid (4) Left Reverse Drive Pump Solenoid | |
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| Illustration 4 | g02754141 |
CTL and Single Speed SSL Hystat Solenoids (1) Right Forward Drive Pump Solenoids (2) Right Reverse Drive Pump Solenoids (3) Left Forward Drive Pump Solenoids (4) Left Reverse Drive Pump Solenoids | |
The solenoid has a connector with two contacts. The solenoid ground is connected to the ECM through contact J1-50. The signal contact is connected to the ECM through contact J1-48. The left pump forward solenoid allows the ECM to command the left pump forward displacement.
Left Pump Reverse Solenoid
Refer to Figure 3 and 4
The solenoid has a connector with two contacts. The solenoid ground is connected to the ECM through contact J1-50. The signal contact is connected to the ECM through contact J1-49. The left pump reverse solenoid allows the ECM to command the left pump reverse displacement.
Right Pump Forward Solenoid
Refer to Figure 3 and 4
The solenoid has a connector with two contacts. The solenoid ground is connected to the ECM through contact J1-50. The signal contact is connected to the ECM through contact J1-51. The right pump forward solenoid allows the ECM to command the right pump forward displacement.
Right Pump Reverse Solenoid
Refer to Figure 3 and 4
The solenoid has a connector with two contacts. The solenoid ground is connected to the ECM through contact J1-50. The signal contact is connected to the ECM through contact J1-52. The right pump reverse solenoid allows the ECM to command the right pump reverse displacement.
High Flow Solenoid
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| Illustration 5 | g02754140 |
(1) High Flow Solenoid | |
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| Illustration 6 | g02894245 |
The solenoid has a connector with two contacts. The solenoid ground is connected to the ECM through contact J2-4. The signal contact is connected to the ECM through contact J2-5.
When a high flow work tool is attached to the electrical work tool harness connector, the ECM energizes the high flow solenoid. When energized, the high flow solenoid will block flow to the standard system pressure relied valve. When the standard system pressure relief valve is blocked, the load sensing signal to the work tool pump is blocked. Without a load sensing signal, the system pressure is limited only by the work tool pump's high-pressure cutoff relief valve, which allows the system pressure to increase to high flow XPS or XHP level.
Travel Pilot ON/OFF Solenoid
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| Illustration 7 | g02754139 |
(1) Travel Pilot ON/OFF Solenoid | |
The travel pilot ON/OFF solenoid performs two roles related to the machine ability to travel.
The first function is to control pilot oil flow to the hydrostatic drive controllers. When the machine is first started, the travel pilot ON/OFF solenoid is de-energized and flow to the hydrostatic drive pump controller is blocked to prevent output flow to the drive motors. When the interlock seat and arm bar switches are closed and the parking brake is depressed, the ECM energizes the travel pilot ON/OFF solenoid and allows pilot oil to the drive pump controllers.
The second function the solenoid provides is control of the drive motor brakes. The brakes are applied by spring pressure and released hydraulically. In the absence of hydraulic pressure, the brakes will be normally applied by the spring pressure. When the interlock seat and arm bar switches are closed and the parking brake switch is depressed, the ECM energizes the travel pilot ON/OFF solenoid valve, which allows hydraulic oil to flow to the parking brakes overcoming the spring pressure and thereby disengaging the parking brakes.
When either the seat switch or arm bar switch are opened or the parking brake switch is placed in the set position, the ECM de-energizes the travel pilot ON/OFF solenoid to prevent machine travel. When the machine is NOT in park and the operator commands machine travel, the ECM energizes the solenoid valve to allow travel. When the ECM detects that the hystat has been in the NEUTRAL position for several seconds, the travel pilot ON/OFF solenoid valve will be de-energized to prevent undesired machine travel.
Implement Pilot ON/OFF Solenoid
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| Illustration 8 | g02773096 |
(1) Implement Pilot ON/OFF Solenoid (2) 2 Speed Solenoid (If Equipped) | |
The solenoid has a connector with two contacts. The solenoid ground is connected to the ECM through contact J2-4. The signal contact is connected to the ECM through contact J1-6.
Two Speed Solenoid
Refer to Figure 8
The solenoid has a connector with two contacts. The solenoid ground is connected to the ECM through contact J2-4. The signal contact is connected to the ECM through contact J1-12. The two-speed switch sends a request to the ECM to have the two-speed solenoid activated. When the solenoid is energized, high speed travel is possible.
Relays
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| Illustration 9 | g02758863 |
(1) ET Connector (2) Work Tool C1 Relay (3) Work Tool C2 Relay (4) Work Tool C+ Relay (5) Work Tool C- Relay (6) Work Tool Trigger Relay (7) Backup Alarm Relay (8) Fuel Pump Relay (9) Ride Control Relay | |
Stop Lamp, Backup Alarm, Fuel Pump, Ride Control, Work Tool Trigger, Work Tool C1, Work Tool C2, C-Minus, and C-Plus Relays
Backup Alarm
Refer To Figure 9.
When the machine is placed in reverse, contact J2-11 sends a signal to energize the relay and send power to the alarm circuit.
Fuel Pump
Refer To Figure 9.
The machine ECM energizes the coil of the relay for the fuel pump through contact J2-12.
Ride Control
Refer To Figure 9.
The ride control feature is enabled or disabled based on the ground speed of the machine. When enabled, contact J2-19 sends a signal to energize the relay and send power to the ride control solenoid.
Work Tool Trigger
Refer To Figure 9.
When the operator activates the work tool trigger, the relay is energized and power is sent to contact A of the work tool connector.
Work Tool C1 and C2
Refer To Figure 9.
When the operator activates the work tool switch, the relay is energized and power is sent to contact F of the work tool connector when the C1 button is pressed.
When the C2 button is pressed, the relay is energized and power is sent to contact E of the work tool connector.
C-Plus and C-Minus
Refer To Figure 9.
When the "Aux 4" button is pressed, contact J2-32 sends a signal to energize the "C+" relay. The relay supplies power to contact D of the work tool connector.
When the "Aux 3" button is pressed, contact J2-27 sends a signal to energize "C-" relay. The relay supplies power to contact C of the work tool connector.