OPERA TION

When operating ABS - equipped the following guidelines should

• Apply the brakes normal. the anti - lock brake system begins function, maintain brake pressure. NOT release the brakes.

• A void rapidly pumping the The anti - lock brake system automatically applies and releases the brakes five times per

• When towing a trailer , watch the trailer through the mirrors. Adjust brake application necessary keep the combination a straight line. Make sure the trailer follows the tractor properly .

• amber trailer ABS lamp the instrument panel will illuminate for several seconds start - during initial function When a trailer ABS fault the lamp will remain illuminated until the fault there a loss communication between the tractor and trailer , the lamp will blink three Refer T railer - Lock Brake System (ABS)” , page 157 for more

MACK Road Stability Advantage (If Equipped)

The MACK Road Stability Advantage (RSA) based the Bendix® ABS - 6 Advanced with ESP® (Electronic Stability Program) The RSA system aids the operator maintaining control the vehicle the event a jackknife rollover situation applying select brakes and reducing engine power required the specific The RSA which integral with the anti - lock brake uses the standard ABS components (such wheel speed sensors and modulator valves) along with a Steering Angle Sensor (SAS60™) and a Y Rate/Lateral Acceleration Sensor60™) package provide information concerning vehicle movement the Advanced60™ Electronic Control most cases, vehicle repairs will not fect function the MACK RSA system. However , the following repairs require recalibration the SAS60™ sensor after the repair has been made:

• Removal and reinstallation replacement the SAS60™ sensor

Caution

Installation aftermarket steering wheel may damage the SAS60™ sensor . ther efor e r ecommended that the OEM steering wheel NOT r eplaced with aftermarket wheel.

• Any repairs the steering system front suspension such as:

Replacement front springs

Replacement king pins bushings

Replacement the steering gear

Replacement the drag cross steering tube ball sockets

Replacement the front spring hangers

Replacement the steering column

• Front end alignment

•

Disconnecting the steering column from the steering gear , the steering linkage from the steering gear

W Arning

Failur e r ecalibrate the steering angle sensor after performing any the r epairs mentioned above, may affect oper function the RSA system, r esulting a loss vehicle contr due system intervention inappr opriate times.

V ehicle Modifications

Alterations the such changes the wheel base (either lengthening the addition auxiliary lift axle removal a factory - installed auxiliary lift major body such conversion a tractor a truck suspension steering system component are NOT these changes will adversely fect performance the road stability Should such changes the system must disabled having a qualified technician replace the Advanced60™ ECU with a Premium60™

W Arning

Failur e disable the RSA system a vehicle that has been modified will r esult serious vehicle braking and performance issues, including unnecessary system interventions. These interventions could lead a loss vehicle contr ol.

addition disabling the system, any cab labels, such warning and caution labels r elating the Bendix® ABS - 6 Advanced with ESP® system located the sun visor must r emoved, and notations must made the