WTR-4828 Bonded Clutch Disk Fits 50, 520 & 530 JD Tractors $75.00     WTR-6129 Bonded Clutch Disk Fits 60, 620, 630, 70, 720 & 730 JD Tractors $45.00            WTR-1052 Bonded Clutch Disk Fits R, 80, 820 & 830 JD Tractors $85.00