https://www.truck-manuals.net/mack/ 132 OPERATION — Replacement of the steering gear — Replacement of the drag link, cross steering tube or ball sockets — Replacement of the front spring hangers — Replacement of the steering column • Front end alignment • Disconnecting the steering column from the steering gear, or the steering linkage from the steering gear
WARNING Failure to recalibrate the steering angle sensor after performing any of the repairs mentioned above, may affect proper function of the RSA system, resulting in a loss of vehicle control due to system intervention at inappropriate times.
Vehicle Modifications Alterations to the vehicle, such as changes to the wheel base (either lengthening or shortening), the addition of an auxiliary lift axle or removal of a factory-installed auxiliary lift axle, or major body changes, such as conversion of a tractor to a truck or an axle, suspension or steering system component modification, are NOT allowed, as these changes will adversely affect performance of the road stability system. Should such changes be unavoidable, the system must be disabled by having a qualified technician replace the Advanced EC-60™ ECU with a Premium EC-60™ ECU.
WARNING Failure to disable the RSA system on a vehicle that has been modified will result in serious vehicle braking and performance issues, including unnecessary system interventions. These interventions could lead to a loss of vehicle control. In addition to disabling the system, any cab labels, such as warning and caution labels relating to the Bendix® ABS-6 Advanced with ESP® system located on the sun visor must be removed, and notations must be made to the operators manuals so that the vehicle operator has a clear understanding as to which ABS options are installed on the vehicle.
