The spares interchangeable to the following:
ABB
VTR 160/1 200/1 250/1 320/1 400/1 500/1 630/1
VTR 254-11 304-11/32 354-11/32 454-11/32 564-32
MAN 
NR15 NR20 NA40 NA48 NA57
MITSUBISHI
MET35 MET42 MET53 MET56 MET66