Lean washer back against wall ..pump has 2 clips holding it on and 2 clamps holding hoses on ..you may try running machine with pump clamps removed and pump pulled off motor shaft first if noise diappears continue remove hose clamps and take pump completely off clean pump if possible something is probably stuck around or behind impeller if you can't find anything but are sure it's pump problem call service ..you want to use that warranty that comes with machine