Oliver Cletrac OC3 (modular)

thingiverse

This is more modular version based on Haggy_23 (created by) and Ettena (remixed by) Cletrac OC3 1:6 scale tractor.https://www.thingiverse.com/thing:4159135https://www.thingiverse.com/thing:4875535For visual modifications I used pictures from internet. Found one image with cabin and used it as blueprint for cabin.Most parts are assembled with M3 bolts and nuts. All details for parts and assembly guide you can find in FreeCAD (.FCStd) file. Also this freeCAD file includes all .stl parts for complete printing result. You do not need to download all files separately, if you have freeCAD.I used ZGB37RG 60rpm 12V motor, but for better torque I recommend lower rpm motor. For terrain like grass, my motors are to weak.Parts with fewer details I used 0.3mm layer height. Smaller parts printed with 0.2mm or 0.15mm layer height. If you want better visual quality, then use 0.15mm layer height.Printed parts:22 x original parts (no modifications)133 x modified & new partsMechanical parts:2 x M2 10mm bolt (roof light)2 x M2 nut (roof light)14 x M3 6mm bolt (12 pcs to motors)2 x M3 8mm bolt (seat spring)12 x M3 10mm bolt17 x M3 12mm bolt6 x M3 12mm bolt (without head)8 x M3 14mm bolt6 x M3 16mm bolt78 x M3 18mm bolt (62 pcs for chain)9 x M3 20mm bolt3 x M3 25mm bolt8 x M3 40mm bolt79 x M3 nut70 x M3 nut (self locking) (62 pcs for chain)18 x M4 14mm bolt18 x M4 nut2 x M6 40mm bolt (countersunk) (for lead wheel)2 x M6 nut (self locking) (for lead wheel)2 x ZGB37RG motor 2 pcs2 x 10x10x220mm aluminium square tube10 x 10x2mm round magnet6 x 13x5x6mm ball bearingNotes:It takes around 160 hours to print (if only 1 printer is used)Parts are designed for 0.3mm or 0.2mm layer heightSome parts are printed with brimLongest print time for one part is around 9 hours (if 0.3mm layer height is used)I used A2 stainless steel bolts & nutsSome original parts must be glued together, I used "4 minute" epoxy.oc3_print_mod_y_part_005 adds some strength but is not directly necessary. Designed as place holder for servo mount (future upgrade).You can use 5050 SMD LED's for roof lights. As light covers, use TAMIYA High Lift truck (or analogs) roof lights glasses.chain_link_mod_y_left.stl & chain_link_mod_y_right.stl are based on original design. But this type chain caused to much wobble. For better stability use oc3_print_mod_y_part_072.stl & oc3_print_mod_y_part_073.stlYou need to print 31 pcs left side chain links and 31 pcs right side chain links.Parts orientation in .stl files are random. You need to position them correctly yourself. Most parts do not need support if you place these right way.