Key features : upgraded version of trc1000mn robust in design with enhanced performance and less maintenance these compressors are used in conventional loco model wap4, wag5 and wag7 locomotives manufactured by chittaranjan locomotives works, chittaranjan and bhel, jhansi unique disc type coupling arrangement which requires very less attention and can take larger misalignment efficient air filtration system ensures higher compressor efficiency and low noise level features w type configuration, three cylinder, two-stage, oil-splash lubricated, air-cooled and direct coupled.