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Throttle/Accelerator Pedal
Throttle/accelerator pedal (4, Figure 5-1), and shown
below, is a foot-operated pedal which allows the
operator to control engine rpm depending on pedal
depression.
It is used by the operator to request torque from the
motors when in forward or reverse. In this mode, the
propulsion system controller commands the correct
engine speed for the power required. In NEUTRAL,
this pedal controls engine speed directly.
N05070 10/06
GRADE/SPEED RETARD CHART
Grade/speed retard chart (8, Figure 5-1), and shown
below, provides the recommended MAXIMUM
retarding limits at various truck speeds and grades
with a fully loaded truck.
This decal in the truck may differ from the decal
below due to optional truck equipment such as:
wheel motor drive train ratios, retarder grids, tire
sizes, etc. Always refer to this decal in the operator's
cab and follow these recommendations for truck
operation.
The operator must reference this chart before
descending any grade with a loaded truck. Proper
use of dynamic retarding will maintain a safe speed.
Two speed lists are provided, one for continuous
retarding, and the second for short term (approxi-
mately three-minute) retarding. Both lists are
matched to the truck at maximum Gross Vehicle
Weight (GVW). The two ratings are guidelines for
proper usage of the retard function on downhill
grades.
Operator Controls
N5-7
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