Train EB applied while entering station.TC feedback LMRG fault, MR at 7.8bar, unable to charge up. CFRS operated & MR charged up to 8.2 bar. Schedule enhanceme nt T503 routed to AMK MT to continue NB service as T212. Def ~~~~~ Checked both Air Compressor ok. Cars:  Cut in:  Cut out:  Leak test: #3514  8.6 bar  10.35 bar  0.6 bar #3513  8.6 bar  10.30 bar  0.6 bar Found #3513 water tank heavy air leak. Isolated and tag. Waiting for spare to replace. Checked by Omar/Henry. 18/04/20. L3   #3513 water tank leaking, found heavy air leaking from water tank. Checked and found pressure regulator wrong rating (3.5 bar) installed. Replaced pressure regulator to PR1.0. Installed new water tank-ok. #3513 air compressor: Cut in-8.35 bar. Cut out-10.5 bar. Charging time-2 min & 25 sec. 5 min air leak test-0.4 bar. #3514 air compressor: Cut in-8.4 bar. Cut out-10.4 bar. Charging time-2 min & 35 sec. 5 min air leak test-0.4 bar. Not:2152766 raised for pressure regulator. Done by Jack/Sateesh/Koh. 20/04/20.