valutazioni - 3, GPA: 4.7
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Facilità d'uso
Slide cover and plastic tube back. Figure 4-1b (4) 20 Hours (3) Before Each Use Figure 4-1d (5) 20 Hours - Gear Bar Lube 13 4-3 BLADE REPLACEMENT The disc mower blades each have two cutting edges. When one edge becomes dull or damaged, remove the bolt and turn the blade over, Nuts can be re-used if not damaged. If both cutting edges of the blade have been used, the blades must be replaced. Always replace both blades on a spindle to retain balance. When replacing blades, the attaching bolt and nut should also be replaced. Use only genuine Bush Hog replacement parts. (Figure 4-2) Figure 4-2 Blade Bolt Blade Disc Blade Stop Blade Nut When replacing blades, insure that shoulder of blade nut is seated into the blade stop and blade disc. Torque blade bolt to 50 ft. lbs. Strike nut with hammer and retorque. 4-4 BELT ADJUSTMENT Belt tension should be checked after first 2 hours of operation and thereafter every 40 hours to get maximum life from drive belts and best performance from mower. To check adjustment, push upward through hole in bottom of belt shield with 10 lbs. of force. Belt should deflect approximately 1/2 inch (Figure 4-3). To increase tension, loosen jackshaft assembly pivot bolt, (Figure 4-8), loosen jam nut, and turn adjusting nut (Figure 4-4) clockwise. Tighten pivot bolt and jam nut. Figure 4-3 Approximately 1/2” Ruler Straight Edge 10 lbs. of force 4-5 BELT REPLACEMENT Replacement belts are sold in matched sets. To maintain an equal amount of tension on each belt, replace all belts at same time. Use only genuine Bush Hog replacement parts. Replace as follows: A. Remove belt shield cover. B. Loosen jackshaft assembly pivot bolt, loosen jamnut, and turn adjusting nut (Figure 4-4) counterclockwise to relieve belt tension. C. Remove belts. D. Install new matched set of belts. E. Tighten adjusting nut until belts deflect 1/2” with 10 lbs. of force applied (Figure 4-3). Rotate belt pulleys 6 complete revolutions to seat the belts into the pulleys. Tighten adjusting nut a second time until belts deflect 1/2” with 10 lbs. of force applied. Tighten jam nut on adjusting nut and tighten assembly pivot bolt. F. Install belt shield cover. Figure 4-4 (8) Mast Pivot Grease Fitting Belt Tension Adjusting Nut 4-6 SPINDLE HOUSING REMOVAL AND REASSEMBLY A. Lower cutter bar to rest on a flat surface that will support the entire length. (Figure 4-5) B. Remove the cap and the blade disc assembly retaining nut on desired blade disc assembly. The outer gear housing assembly has the crop divider asembled to the blade disc assembly. The cap for the crop divider must be removed to provide access to the retaining nut. STANDARD CROP DIVIDER - Detach the cap and cutter by removing the four (4) capscrews attaching the cap to the crop divider. (Figure 4-6) OPTIONAL CROP DIVIDER - Remove cap by loosening jam nut, turn threaded rod counterclockwise so cap moves down on threaded rod approximately 1-1/2” tilt cap sideways and remove out the top of crop divider. (Figure 4-7) 14 Figure 4-5 Blade Disc Cap Covering Retaining Nut Standard Crop Divider Cutter Bar (Curtain Removed To Show Details Only) Figure 4-6 Standard Crop Divider (Curtain Removed To Show Details Only) Figure 4-6 Standard Crop Divider Cutter CapCrop Divider Retaining Nut Output Shaft Blade Disc Assembly The blade disc assembly is now ready to be removed from the cutter bar. If required, a steady prying force on either side of the cutter bar, spaced 180° apart, can aid in removing the blade disc assembly from the spindle shaft. C. Remove the six (6) M10 nuts connecting the spindle assembly to the cutter bar. (Figure 4-8) D. Lightly tap a screwdriver into the two slotted notches cast into each spindle housing, positioned 180° apart. Simultaneously and with equal force, press downward on the two screwdrivers. When the sealant attaching the spindle housing to the cutter bar has been broken, remove the entire spindle assembly from the cutter bar taking special care to keep dirt and debris out of the cutter bar. E. Prior to reassembling the spindle assembly onto the cutter bar (see your Bush Hog Repair Parts Catalog for the spindle assembly part number), thoroughly clean the top face of the cutter bar casing where the spindle was originally located of all old sealant, oil and dirt. F. Draw a bead of oil resistant gasket sealant (Dow Corning 735 sealant recommended by manufacturer) around the perimeter of the spindle housing opening in the cutter bar casing. G. Position the spindle assembly over the six (6) M10 bolts (ensuring that blade disc will assemble at 90° to the adjacent assembly) and join the spindle assembly to the cutter bar using the six (6) M10 nuts removed in Step C. Apply Loctite 242 thread sealant to the threads of the Figure 4-7 Optional Crop Divider Hub Cap Jam Nut Threaded Rod Cap Crop Divider Retaining Nut Output Shaft Blade Disc Assembly Figure 4-8 Cutter Bar Spindle Assembly six (6) M10 bolts and torque the nuts to a value of 62.5 - 73 ft./lbs. H. Insta...
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