6-NFR DISTRIBUTING VALVE ( cont)
43. Test the 6-NFR distributing valve in accordance with Test Specification NYT-460. The 6-NFR distributing valve
functions as follows:
During charging and release, the 6-FNR distributing valve functions as follows:
(1) Brake pipe air flows first to the outer face of the equalizing piston diaphragm, forcing the piston and slide
valve to release position.
(2) Air in brake pipe flows through charging choke and equalizing slide valve to the pressure chamber, charging
it to brake pipe pressure.
(3) In this position, equalizing slide valve connects application chamber through release port No. 4 to exhaust.