-32-143387 - PRO-TILL 14|17|20 (02-April-2019)Disc Arm Components & Disc OptionsIMPORTANT: Safely securePro-Till in winged forwardtransport position whenchanging or servicing discs.Discs/Hubs - Required Numbers Per Machine14' Pro-Till Requires 30 Discs/Hubs17' Pro-Till Requires 38 Discs/Hubs20' Pro-Till Requires 46 Discs/Hubs121080 - O-Ring,Nitrile M6x88 (1)121083 - O-Ring,Nitrile #238 (1)121082 - O-Ring,Nitrile M5.3x87.5 (1)131415 - Disc Hub Unit (Varied Suppliers) - Replacement O-RingsINA - Markings GBGI - No MarkingsSKF - MarkingsDisc Hub ComponentsFront Row - Standard Disc Assembly Components Back Row - Standard Disc Assembly ComponentsStandardEconomy 20"20" 22"Economy Discs Premium Discs20” Straight 20” Notched 20” Straight 20” Notched 20” Double-V 22” Straight 22” Notched 22” Double-VNotched Notched143567 143568 143556 143557 143553 143562 143563 143566Typical Factory Settings of End Discs20" Disc Option(3) - 20" End Discs - Straight 143556 &(1) - 18" Rear RH - End Disc22" Disc Option(3) - 22" End Discs - Straight 143562 &(1) - 20" Rear RH - End Disc 143556(Note: Customers may wish to adjust the enddisc sizes and locations for customer preferredperformance in certain soil or field conditions.)143550118279 - Bolt,1/2 x 1-1/2GR8 (4)131415 - Disc HubUnit (1)143556 - Disc, 20” (1)143549 - Rubber Insert (4)118635 - Flat Washer,3/4 x 2-1/4 (1)118468 - Nut, 1/2- Flange (4)117580 - Bolt, Carriage- 5/8 x 2-1/4 GR8 (4)117581 - Lock Nut, TopFlanged - 5/8 GRG (4)572404 - Disc ArmClamp Plate (1)572401 - Disc ArmAssembly, Front Row (1)IMPORTANT: Add BlueLoctite to threads & Torqueto 350 lb.ft (475 N.m)117991 - Bolt, Flange3/4 x 1-1/2 UNF GR8 (1)Previous: 118175 - Bolt,3/4 x 1-1/2 UNF GR8 (1)117581 - Lock Nut, TopFlanged - 5/8 GRG (4)118279 -Bolt, 1/2 x1-1/2 GR8 (4)131415 - Disc Hub Unit (1)143556 - Disc,20” (1)143549 - RubberInsert (4)118635 - FlatWasher, 3/4 x2-1/4 (1)118468 - Nut, 1/2 - Flange (4)117580 - Bolt,Carriage - 5/8 x2-1/4 GR8 (4)572404 - Disc ArmClamp Plate (1)572406 - Disc ArmAssembly, Back Row (1)IMPORTANT: Add BlueLoctite to threads & Torqueto: 350 lb.ft (475 N.m)117991 - Bolt,Flange - 3/4 x1-1/2 UNF GR8 (1)Previous: 118175 -Bolt, 3/4 x 1-1/2UNF GR8 (1)