Brake pressure out of criteria. To recti ~~~~~ 3705 bogie 2 brake pressure out of criteria. To rectify.  Observed on TIMS that #3705 Bogie 2 was low at B3, B2 and B1 (0.25 bars). Brake pressure was 0 bar at coast. Observed that brakes were not able to physically apply at B1-B3 due to low pressure. Fault code 311 BCU service brake available fault DT bogie 2. Checked brake service reservoir pressure corresponds to TIMS. Replaced Rio valve at 3705. Brake function check ok, brakes able to apply and release with the correct range of brake pressures. RIO Valve #3705 Old SN: 1722029SPC New SN: 1650002SPC Notification: 2558996 Done by: Haslan/Asruddin 45300