 | |
| Illustration 1 | g00780913 |
Operator's Console (1) Brake air pressure indicator (2) Two air pressure gauges | |
 | |
| Illustration 2 | g00931339 |
Operator Platform (3) Air control valve for the service brakes | |
 | |
| Illustration 3 | g00931340 |
Rear View (3) Air control valve for the service brakes (4) Low brake air pressure switch (5) Stop lights air pressure switch (6) Low brake air pressure switch | |
The AVSpare Monitoring System consists of an action alarm, action light and a monitoring panel with individual indicators for each machine system. The AVSpare Monitoring System provides three warning categories. The first warning category requires only operator awareness. The second warning category needs operator response. The third warning category requires immediate shutdown of the machine systems.
Brake air pressure indicator (1) is a Warning Category 3. The low brake air pressure switch (4) is located on one side of air control valve (3) for the service brakes. The low brake air pressure switch (6) is located on the other side of air control valve (3). Switches (4) and (6) send a signal to the control for the AVSpare Monitoring System. The control for the AVSpare Monitoring System activates the action alarm, the action light and the indicator for the brake air pressure. If either circuit of the air system fails, the appropriate air pressure switch will open at approximately 530 kPa (77 psi). This opens the circuit in order to signal the control for the AVSpare Monitoring System. This is a Warning Category 3. This indicates low air pressure to the brakes. The operator must stop the machine immediately. Engage the parking brake, and stop the engine. The operator can look at air pressure gauges (2) on the instrument panel in order to determine the circuit that has failed. Do not operate the machine until the cause has been corrected.
Note: The action alarm is located in the console to the right of the operator's seat.
The last circuit is for the stop lights. Stop lights air pressure switch (5) is in the air line between air control valve (3) for the service brakes and the brakes. When the service brake control (pedal) is depressed, the air pressure switch (5) closes. This completes a circuit in order to operate the stop lights.
Each circuit is connected to the battery through a separate fuse in the fuse box.
For further information, refer to the appropriate Operation and Maintenance Manual.