Parking Brake Control Valve
4900 dm 04.08.000
Note: See Brake System General Information for detailed information about brake systems.
The parking brake control valve applies both the tractor and trailer spring parking brakes. See Fig., Item 2. Pushing the knob in releases the spring parking brakes.
If the trailer is not equipped with spring parking brakes, pulling out the parking brake valve applies the tractor parking brakes and the trailer service brakes.
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Trailer Air Supply Valve (red knob)
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Parking Brake Control Valve (yellow knob)
Fig. 1, Brake Valve Knobs
Note: