QR-1 air brake quick release valve for M939 series 5 ton trucks, and M915, M916, M917, M918, M919, and M920.
P/N 288251 (11602155). NSN 4820008572737. (replaces NSN 4820012191990)
Also replaces 20-QE-1955, 20-QE-19365, 973-500-003-0, VP 802743, KN-32005, 288251X, 229859X, BX288251, BX065212, NS229859, 473-794-C, BX229859, 229859.
The function of the quick release valve is to speed up the
exhaust of air from the air chambers. It is usually mounted close to
the chambers it serves. Crack pressure: 1 psi. All ports are 3/8 inch N.P.T.