HUB-FAN PULLEY 7C0705 - Caterpillar

Illustration 2 g00888908
(14) Calibrated initial brake pressure point (15) Transmission neutralization point (16) Maximum pedal travel (17) Stop light limit switch (18) Left brake pedal position sensor (A) Left brake pedal deadband (B) Downshifting with no service brakes applied. (C) Downshifting with service brakes applied.
Illustration 3 g02704618
(1) Autoshift SwitchThe Integrated Braking System uses the following inputs in order to downshift the transmission:
"Integrated Braking System Manual Mode Enable Status" in the power train ECM
Left Brake Pedal Position
Position of the Autoshift Switch
Actual Transmission Speed
Calibrated Initial Brake Pressure Point
Torque Converter Output Speed
Transmission Output Speed
Engine SpeedNote: The input from the "Integrated Braking System Manual Mode Enable Status" is used only in the manual shifting mode. The Integrated Braking System is always enabled in the autoshift mode.The Integrated Braking System is enabled if the following conditions are met:
The "Integrated Braking System Manual Mode Enable Status" must be set to "Enable".
The position sensor for the left brake pedal has been calibrated.
Engine speed is below 2425 RPM.
The left brake pedal is depressed beyond left brake pedal deadband (A) .
The torque converter output speed sensor, transmission output speed sensors, and the position sensor for the left brake pedal do not show any diagnostic codes.Note: The "Integrated Braking System Manual Mode Enable Status" only set to "Enable" in the manual shifting mode. The Integrated Braking System is always enabled in the autoshift mode.Initial Mode and Normal Mode
The Integrated Braking System is in initial mode (B) when the operator depresses the left brake pedal between left brake pedal deadband (A) and calibrated initial brake pressure point (14) . The Integrated Braking System is in normal mode (C) when the operator depresses the left brake pedal between calibrated initial brake pressure point (14) and the point of maximum pedal travel (16) .The Integrated Braking System performs the following functions when the operator depresses the left brake pedal in initial mode or normal mode:If the transmission is in third speed or fourth speed, the transmission will downshift one speed at a time until second speed is reached. The transmission will downshift regardless of the position of the autoshift switch. Each downshift will occur when the transmission output speed decreases to the shift point for the current transmission speed.The transmission will downshift from second speed to first speed if the autoshift switch is in the "AUTO 1-4" position. The transmission will downshift when the transmission output speed decreases to the "2-1" shift point for initial mode or for normal mode.
Table 1
Automatic Downshift
Transmission Output Speed    
Speed Range     Normal
Mode
RPM     Safe
Mode
RPM     Initial
Mode
RPM    
4 to 3     1810     1790     1810    
3 to 2     900     850     850    
2 to 1     400     400     375    
Illustration 4 g02706237
(2) Transmission Downshift Switch (Conventional Steering)
Illustration 5 g02706238
(3) Transmission Downshift Switch (Conventional Steering)
Illustration 6 g00888953
Speed Select Switch (Command Control Steering)If the autoshift switch is not in the "AUTO 1-4" position, the transmission will not downshift from second speed to first speed unless the operator depresses the transmission downshift switch. The