Air Brake Manual
Air Brake Manual
Air Brake Manual
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
30 28<br />
26<br />
24<br />
20<br />
31<br />
In this illustration, the driver has made a brake application<br />
with the foot valve (31) and application air is<br />
being delivered to the tractor brake chambers. The<br />
two-way check valve (26) has shifted to the low<br />
pressure side, allowing application air to reach the<br />
tractor protection valve (24).<br />
There is no air loss from the tractor through the<br />
disconnected glad hands (20).<br />
If the driver, by mistake, applied the hand valve (30)<br />
with the trailer disconnected, the application air<br />
directed to the tractor protection valve would also<br />
be dead-ended. Again, no air loss would occur if the<br />
trailer supply valve (28) is in the closed position.<br />
30 28<br />
26<br />
24<br />
20<br />
31<br />
45