A. Attach hitch assembly to cutter bar assembly using 1 x 9” pin, cotter pin, 3/8 x 2” bolt, and locknut. The bolt should be installed through the welded bushing. (Figure 5-1) B. Slide breakaway assembly over bushing on hitch mast and rotate 180 degrees to lock in place. Fasten breakaway assembly to beam using 1 x 3-3/4” bolt and locknut. C. Pin butt end of cylinder and beam spring cushion to frame using 1 x 8-1/8” pin, 3/8 x 2” bolt, and locknut. Note that cylinder ports must be facing down. D. Fasten opposite end of spring cushion to beam using 1/2 x 2-1/4” bolt and locknut. E. Pin parking stand in place. F. Attach curtain support beam to the gearbox using four 12mm x 40mm bolts and lockwashers. G. Attach gearbox strap with 1/2 x 2” bolts, nuts and lockwashers. H. Attach cylinder lug and dirt shield bracket to curtain support beam using two 1 x 5-1/4” pins, cotter pins and flatwashers. I. Attach dirt shield with 1/2 x 2-1/2” bolts, nuts, flatwashers, lockwashers and spacer. J. Attach upper end of dirt shield to dirt shield bracket with 3/8 x 1” machine screws, nuts and washers. K. Attach rear bracket to curtain beam plate with 1/2 x 3” bolt, nut and lockiwasher. L. Fasten front and rear curtain supports to support beam using 3/8 x 2-1/4” bolts and locknuts. Do not over-tighten to allow curtain supports to pivot. Attach curtain adjustment chain between beam and frame as shown. (Figure 5-1) M. Remove solid plug from butt end of cylinder and install vent plug. Plumb opposite end of cylinder as shown in Figure 5-2. Be sure that restrictor is in place on elbow. N. Pin rod end of cylinder to cylinder lug. O. (GHM 900 and 1900 only) Connect cutter bar helper spring to curtain support beam. Connect opposite end of helper spring to frame. P. Lay curtain over supports. Secure using 3/8 x 1” machine screws, flatwashers, lockwashers and nuts. Use a tube clip to secure curtain to the left end 19 of front and rear curtain support. Q. Fasten transport latch to curtain support beam using a 5/8 x 1-3/4” bolt and locknut. Pin opposite end in place with faspin. R. Install curtain stop weldment flush with end of curtain support beam using one 5/8” U-bolt, lockwasher, flatwashers and nuts. Vent Plug Butt End Cylinder Elbow Figure 5-2 Hydraulic Hose Restrictor Figure 5-1 Assembly Cutter Bar Helper Spring Beam Spring Cushion Hitch Assy. Parking Stand Cylinder Curtain Transport Latch Breakaway Assy. Beam Gearbox Dirt Shield Tube Clip Curtain Support Curtain Support Beam Swath Board Curtain Stop Weldment Crop Divider Curtain Adjustment Chain Cylinder Lug 20 SAFETY DECALS To promote safe operation, Bush Hog supplies safety decals on all products manufactured. Because damage can occur to safety decals either through shipment, use or reconditioning, Bush Hog will, upon request, provide safety decals for any of our products in the field at no charge. Contact your authorized Bush Hog dealer for more information. 82617 86158 24-6-423 86160 60873 60874 21 86159 86118 50012616 78608 78786 50012615 22 TORQUE SPECIFICATIONS Proper toque for American fasteners used on Bush Hog equipment. Recommended Torque in Foot Pounds (Newton Meters).* AMERICAN Bolt Head Markings WRENCH SIZE (IN.) “A” BOLT DIAMETER (IN.) “B” AND THREAD SIZE SAE GRADE 2 SAE GRADE 5 SAE GRADE 8 7/16 1/4 - 2O UNC 6 (7) 8 (11) 12 (16) 7/16 1/4 - 28 UNF 6 (8) 10 (13) 14 (18) 1/2 5/16 - 18 UNC 11 (15) 17 (23) 25 (33) 1/2 5/16 - 24 UNF 13 (17) 19 (26) 27 (37) 9/16 3/8 - 16 UNC 20 (27) 31 (42) 44 (60) 9/16 3/8 - 24 UNF 23 (31) 35 (47) 49 (66) 5/8 7/16 - 14 UNC 32 (43) 49 (66) 70 (95) 5/8 7/16 - 20 UNF 36 (49) 55 (75) 78 (106) 3/4 1/2 - 13 UNC 49 (66) 76 (103) 106 (144) 3/4 1/2 - 20 UNF 55 (75) 85 (115) 120 (163) 7/8 9/16 - 12 UNC 70 (95) 109 (148) 153 (207) 7/8 9/16 - 18 UNF 79 (107) 122 (165) 172 (233) 15/16 5/8 - 11 UNC 97 (131) 150 (203) 212 (287) 15/16 5/8 - 18 UNF 110 (149) 170 (230) 240 (325) 1-1/8 3/4 - 10 UNC 144 (195) 266 (360) 376 (509) 1-1/8 3/4 - 16 UNF 192 (260) 297 (402) 420 (569) 1-5/16 7/8 - 9 UNC 166 (225) 430 (583) 606 (821) 1-5/16 7/8 - 14 UNF 184 (249) 474 (642) 668 (905) 1-1/2 1 - 8 UNC 250 (339) 644 (873) 909 (1232) 1-1/2 1 - 12 UNF 274 (371) 705 (955) 995 (1348) 1-1/2 1 - 14 UNF 280 (379) 721 (977) 1019 (1381) 1-11/16 1-1/8 - 7 UNC 354 (480) 795 (1077) 1288(1745) 1-11/16 1-1/8 - 12 UNF 397 (538) 890 (1206) 1444 (1957) 1-7/8 1-1/4 - 7 UNC 500 (678) 1120 (1518) 1817 (2462) 1-7/8 1-1/4 - 12 UNF 553 (749) 1241 (1682) 2013 (2728) 2-1/16 1-3/8 - 6 UNC 655 (887) 1470 (1992) 2382 (3228) 2-1/16 1-3/8 - 12 UNF 746 (1011) 1672 (2266) 2712 (3675) 2-1/4 1-1/2 - 6 UNC 870 (1179) 1950 (2642) 3161 (4283) 2-1/4 1-1/2 - 12 UNF 979 (1327) 2194 (2973) 3557 (4820) SAE Grade 2 (No Dashes) SAE Grade 5 (3 Dashes) BoltDiameter “B” SAE Grade 8 (6 Dashes) Wrench Size “A” Proper torque for metric fasteners used on Bush Hog equpment. Recommended torque in foot pounds (newton Meters).* METRIC 8.8 Diameter “B” WRENCH SIZE (mm) “A” BOLT DIA. (mm) “B” ASTM 4.6 ASTM 8.8 ASTM 9.8 ASTM 10.9 ...

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