655A - 4 CYL TRACTOR LOADER BACKHOE (6/85-10/88) 16 - SEATS Parts group 655A - 4 CYL TRACTOR LOADER BACKHOE (6/85-10/88) 13A01 - SWIVEL SEAT ASSEMBLY, ORIGINAL 13A02 - SWIVEL SEAT ASSEMBLY, REPLACEMENT 13B01 - SWIVEL SUSPENSION SEAT ASSEMBLY - 550, 555 13C01 - DELUXE SUSPENSION SEAT ASSEMBLY, BOSTROM-V 13D01 - SEAT ASSEMBLY, NH-E (75/) - 550, 555 sale parts diagram catalog online construction equipment excavator tractor