AIR TANKS (RESERVOIRS)
The two steel air tanks, commonly known as reservoirs, are used to cool, store, remove moisture from the air, and give a smooth flow of air to the brake system. At the bottom of each tank is a drain valve (fig. 7-44). This valve is used to allow the operator a means to drain the air from the tanks daily, thereby preventing
Figure 7-43.- Unloader assembly.
Figure 7-44.- Air reservoir with an air drain valve.
A safety, valve is located on top of the first brakes applied, cover the edges of the diaphragm and reservoir and consists of an adjustable spring-loaded bolt with soapy water to detect leakage. If leaks are bail-check valve in a body. It is used to protect the present, tighten the bolts uniformly until the leaks stop. system against excessive pressures. normally set at Bolts should not be tightened so that the diaphragm approximately 150
psi. shows signs of bulging or distortion. any moisture buildup in the system. Moisture in the Replace the diaphragm if it is worn or leaking. system prevents the brakes from actuating smoothly. Replace the boot if it is worn or cracked.
