11. EXPLANATION OF COMPONENTS 11.5.4 LEFT PEDAL SECONDARY BRAKE The left brake pedal applies the machine brake without decelerating the engine. This pedal actuates a brake valve mounted behind the dash. With the engine running and the pedal in the up position, pressure is directed to a spring extended cylinder mounted in the rear main fame. The pressure retracts the cylinder and releases the brakes. When the pedal is depressed, pressure is decreased in relation to pedal position. The decrease in pressure allows the cylinder to apply a force to the brake equalizer bar which applies the brakes.
When the engine is shut down or if hydraulic transmission failure occurs, the brake will fully apply after the pedal is depressed. Once the brake pressure has been dumped the brake will stay applied until the engine is started. If the engine is not runnable a remote source of pressure must be applied to the tow port to release the brakes. See 16.4 METHODS OF TOWING MACHINE. 11.5.5 BRAKE AND DECELERATOR PEDAL / A WARN’NG I Do not put your foot on this pedal unnecessarily. This pedal 0 overrides the engine speed control lever setting. Partial depression of the pedal decreases engine speed for smoother changes in machine direction and to ease the machine up to a load.
Release the pedal to accelerate to the engine speed control lever setting. This pedal stops the machine when fully depressed. It also serves as a parking brake when the brake pedal lock is applied. 11.5.6 BRAKE PEDAL LOCK A WARNING Whenever the machine is parked, always lock the brake pedal. I This lock 0 secures the right brake pedal in the applied position for parking the machine. To lock the pedal, fully depress the pedal, push down on the lock and remove your foot from the pedal. To release the brake, depress the pedal. REMARK Release the lock before moving the machine. The brakes could burn or be damaged if the machine is driven with them applied.
11.5.7 BLADE CONTROL LEVER This lever controls all operation of the blade; blade raise, lower and float; right or left tilt and right and left angle. REMARK Holding the lever in any position except HOLD or FLOAT for an extended period of time after the hydraulic cylinder rod has reached the limit of its travel will produce excessive heat in the hydraulic system which may affect equipment performance. 2-15