JOINT 0000503 - Caterpillar

Illustration 1 g00851910
Left Brake Pedal
(A) Range for impeller clutch maximum pressure
(B) Range for impeller clutch control
(C) Range for service brake application Range (A) indicates the first two degrees of pedal movement. In this range, the impeller clutch pressure is reduced to the maximum working pressure level. Range (A) is the approximate pressure range for preventing slippage of the impeller clutch.Range (B) indicates the next eleven degrees of pedal movement. In this range, the impeller clutch pressure is reduced proportionally. More pedal travel will equal less impeller clutch pressure. Range (B) will modulate the impeller clutch pressure from the maximum working pressure to the minimum impeller clutch pressure.Range (C) occurs approximately within the next thirteen degrees of pedal travel. In this range, the pedal will engage the service brakes proportionally.Reference: For more information about the torque converter impeller clutch, refer to the Service Manual module Systems Operation, "Torque Converter" for the machine that is being serviced.