The cart is empty

Cannot find your purchased courses? Click here to Login!


You must know what a manual front wheel limiting valve is for your CDL air brake test. These are no longer found on modern trucks.To reduce application pressure to the steering axle by 50 % compared to the drive axle brakes, when required by reduced road conditions (rain, snow or ice).

The system consists of a dash switch with 2 positions:

Dry Road: 100% front wheel braking; in other words, all brakes apply equally.

Slippery Road: reduces braking force to the front brakes by (50%) when in the slippery position.

Log in to comment

© Smart Drive Test Inc. 2024.

Contact Us: [email protected]