Aftermarket boom lift hydraulic cylinder. For John Deere skid steer loader models 6675 asn: 020538, 7775 asn: 020489. Part number MG87038977 *replaces part # MG86633432 MG86518383 MG86523366 *Will also replace part # MG86570929 that was used on 6675 up to serial# 020538 , 7775 up to serial# 020489. Both cylinders must be changed along with replacing the long hydraulic tubes on the rod end. The right uses part # MG8652397 and the left uses part # MG86521398. Please call if this is needed.