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| Illustration 1 | g03668296 |
View of the service foot brake control
(1) Dynamic brake pedal (Engine Retarding and Service) |
During normal operation, the operator will use dynamic retarding only through all speeds. Dynamic retarding uses operator input and brake ECM control to integrate electric motor retarding and the hydraulic service brakes to stop the machine.
For braking when machine speed is over 8 km/h (5 mph) the first 80% of dynamic brake pedal (1) movement is exclusively electric motor retarding. The last 20% of dynamic brake pedal (1) movement has added spring force and will engage the service brakes in addition to retarding. Fully depressing the pedal will give 100% retarding and 100% service braking.
For braking when the machine speed is under 8 km/h (5 mph), electric motor retarding can no longer be used for machine braking. At low speeds the service brakes will be used exclusively for braking with identical dynamic brake pedal (1) function. The ECM-controlled automatic braking function is activated for integration of service brakes into the dynamic retarding while at low speeds.
