GP-A134R Pin, Adjusting for John Deere two cylinder brake systems. This is our single piece offering. Our pin is an accurate reproduction pin, fully case hardened, clear zinc plated. Normally 2 pins are required per brake assembly and are offered as GP-134R2PK. This pin fits John Deere tractor models: A,AO,AR,AOS,G,GN,GW,R,520,530,60,620,630,70,720,730,80,820,830