PLATE ASSEMBLY 9W0556 - Caterpillar

Safe Mode
The Integrated Braking System will enter safe mode if the engine speed exceeds 2550 RPM or torque converter output speed exceeds 3500 RPM.
Table 2
Integrated Braking System
Shift Points for Transmission Output Speed (1)    
Safe Mode 4-3     1790    
Safe Mode 3-2     850    
Safe Mode 2-1     400    
( 1 ) Shift points are measured in RPM.If the Integrated Braking System enters safe mode, the Integrated Braking System will signal the power train ECM to upshift the transmission speed. The power train ECM will upshift to the maximum transmission speed that is selected between the position of the transmission auto/manual switch and the transmission speed control.The Integrated Braking System will signal the power train ECM to downshift the transmission speed. The power train ECM will downshift the transmission speed when the transmission output speed is less than the corresponding safe mode shift point. The safe mode shift point are listed in Table 2.When the transmission output speed is less than the corresponding safe mode shift point, Integrated Braking System signals the power train ECM to downshift the transmission speed. Integrated Braking System will return to the initial mode or to the normal mode. The mode is dependent upon the position of the left brake pedal.Note: Integrated Braking System is disabled if the left brake pedal is released beyond left brake pedal deadband (A). After Integrated Braking System is disabled, the power train ECM controls the transmission shifts.Transmission Neutralizer
The transmission neutralizer override switch is the only input to the transmission neutralizer enable control. The transmission neutralizer enable control will be enabled when the machine is started. If the transmission neutralizer enable control is enabled, the neutralizer indicator lamp is not illuminated.The transmission neutralizer enable control is alternately enabled or disabled when the momentary transmission neutralizer override switch is depressed. The transmission neutralizer enable control is disabled if there are any diagnostic codes in the position sensor for the left brake pedal.The transmission neutralizer control uses the inputs that follow: left brake pedal position, position of the transmission auto/manual switch, engaged transmission speed, neutralization set point, status of the transmission neutralizer enable control and ground speed of the machine.The transmission neutralizer control has two modes of operation, normal loading and truck loading. The mode of operation is determined by two factors, the type of transmission direction and speed control and the position of the transmission auto/manual switch. Refer to Table 3 that follows for the possible modes for the transmission neutralizer.Note: Table 3 does not apply to 980G Wheel Loaders.
Table 3
Modes of the Transmission Neutralizer for Machines that are Equipped with Conventional Steering and Pilot Hydraulic Bucket Controls    
Position of the auto/manual switch     Manual     2-4     2-4 Auto     1-4 Auto    
Selected Speed     ALL     All Except 2     2     All    
Transmission Neutralizer Mode     Normal     Normal     Truck Loading     Normal    
Table 4
Modes of the Transmission Neutralizer for Machines that are Equipped with Command Control Steering