TM  10-3930-669-20 PRESSURE TEST (1) Disconnect brake line from master cylinder (Para 11-4). (2) Connect  0  to  2,000  psi  (0-13,790 kPa)   pressure   gauge   to   master cylinder. (3) Apply and release brake pedal and observe gauge. (a)   If pressure does not drop to O psi (0O kPa), perform Step (4) below     and     replace     master cylinder. (b)   If  pressure  drops  to  0  psi  (O kPa), master cylinder is OK. (4) Remove  0  to  2,000  psi  (0-13,790 kPa) pressure gauge. (5) Connect    brake    line    on    master cylinder. 2-343