Appendix, Parts list, 581a native grass rate reduction kit – Great Plains 1007NT Assembly Instructions User Manual
Page 6: Abbreviations, 160c spkt 40b12 x 36t spline bore, 080d chain rl #40 105 pitches, Idlers, Just, 282d spkt 40b17 7/8 hex w/ss, 035c screw set 5/16-18 skt kp x 3/8
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