TM 5-4310-376-14
1-13. COMPONENT DESCRIPTIONS - Continued
When air tank reaches a predetermined value (200 +0 -10 psi), pressure is sensed through sens-
ing port (3) which forces ball (4) from its seat. Air from the air tank advances the vent piston
valve (5), closing check valve (1) and compressor discharge is vented to the atmosphere through
air vent (6). Air from the air tank also flows through the governor control tube (7) and reduces
engine speed.
The unloading control valve continues to vent air to the atmosphere until some air has been
used from the air tank. When air tank pressure reaches load pressure, ball (4) will reseat, vent
piston valve (5) returns to the closed position and seals off air vent (6), allowing check valve (2)
to open and pass air directly to the air tank.
1-7(1-8 blank)
