3359 DT check found heavy air leak fromm ~~~~~ #3559 Found WFL-B/S  hose dislodge found that hose is short and quick coupling faulty.Replace hose & quick coupling ok.Addition found #3559 MR test fitting(in cab)heavy air leaking-Replace MR test fitting-ok.Air leak test 0.55/5min. Done by Saini/Asruddin. 27/03/23