CAT 815 Retainer Plate Cat Part Number 106-2048 To Suit Cat 815 The CAT 815 Retainer Plate is designed to bolt your RP-031 ( 4S7928 ) Reversible scraper tyne to RP-046 (194-2008 194-2010 194-2009) weld on finger. Roller Parts Australia not only stocks a wide range of CAT compactor GET but we also have a range of services, Including brand new wheels and sleeves, refurbishments / rebuilds, frames and compactor conversions.