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Manual Front Wheel Limiting Valve

OBSOLETE

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.

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