© 2018 Pierce Manufacturing Inc. All Rights Reserved.
Driving the Vehicle / 5-51
OPERATION
5-28.4 Traction Control
(Optional)
Automatic Traction Control (ATC) is an optional feature of the ABS system. ATC operates in two ways:
•
It applies the service brake to a spinning wheel so that the torque can be transferred through the differential to
the wheel that has the traction.
•
It reduces engine torque when both wheels are spinning to improve traction.
The ATC light located in the cab will light when the ATC feature is active.
A traction control switch is provided with the ATC option. This function increases available traction on extra soft
surfaces like snow, mud, or gravel by slightly increasing the permissible wheel spin. When this feature is selected,
the ATC indicator light will blink continuously.
NOTE:
For 4x4 vehicles with Electronic Stability Control (ESC), the ATC system is only active in 4x4 mode.
Refer to
Table 5-9: ATC Light Operation - 4x4 Chassis with ESC
5-28.5 Parking Brakes
All Pierce Custom Chassis are equipped with spring brakes on the rear axles for parking. The spring brakes are
applied by operation of the yellow parking brake valve. These brakes are intended to hold the vehicle in a parked
position or to assist in bringing it to an emergency stop and should not be used for normal driving.
If air pressure is lost in the rear service brake section, the spring brakes will be modulated by pressure from the front
brake section allowing a few brake applications before the spring brakes are automatically applied. If air pressure is
reduced to approximately 40 psi in both systems, the spring brake valve will automatically apply.
Mode
ATC Light
ATC Status
ESC Status
4x2
ON
OFF
ON
4x4
OFF; flashes when
system is active
ON
ON
Uncontrolled Vehicle Hazard
Never park vehicle on a steep grade.
Before leaving driver seat ALWAYS:
•
Set parking brake.
•
Turn front wheels in the direction of the curb.
Immediately after leaving the driver seat:
•
Block wheels with adequate wheel chocks.
Failure to follow these procedures may lead to loss of vehicle control, property damage, personal
injury, or death.
Summary of Contents for Enforcer
Page 1: ... 2018 Pierce Manufacturing Inc Part No PM C OM014 SEN 0718 Operator s Manual Saber Enforcer ...
Page 2: ......
Page 18: ...FOREWORD 1 6 To the Owner and Operator 2018 Pierce Manufacturing Inc All Rights Reserved ...
Page 30: ...SAFETY 2 12 Safety and Responsibility 2018 Pierce Manufacturing Inc All Rights Reserved ...
Page 122: ...OPERATION 5 60 Driving the Vehicle 2018 Pierce Manufacturing Inc All Rights Reserved ...
Page 184: ...A 4 2018 Pierce Manufacturing Inc All Rights Reserved ...