Correcting Cutting Unit Mismatch

If there is mismatch between the blades, the grass will appear streaked when it is cut. This problem can be cor­ rected by making sure the blades are straight and all blades are cutting on the same plane.

1.Using a 3 foot (1 m) long carpenters level, find a lev­ el surface on the shop floor.

2.Raise height–of–cut to the highest position: refer to Adjusting Height–Of–Cut.

3.Lower cutting unit onto flat surface. Remove covers from top of cutting unit.

4.Unhook spring from idler arm bracket to release belt tension.

5.Rotate blades until the ends face forward and back­ ward. Measure from floor to front tip of cutting edge and remember this dimension. Then rotate same blade so opposite end is forward and measure again. The differ­ ence between dimensions must not exceed 1/8 of an inch (3 mm). If dimension exceeds 1/8 of an inch (3 mm), replace the blade because it is bent. Make sure to mea­ sure all blades.

6.Compare measurements of outer blades with the center blade. Center blade must not be more than 3/8 of an inch lower than the outer blades. If center blade is more than 3/8 of an inch (9 mm) lower than the outer blades. proceed to step 7 and add shims between spindle housing and bottom of cutting unit.

7.Remove capscrews, flatwashers, lockwashers and nuts from outer spindle in the area where shims must be added. To raise or lower the blade, add a shim, Part No. 3256–24, between spindle housing and bottom of cut­ ting unit. Continue to check alignment of blades and add shims until tips of blades are within the required dimen­ sion.

IMPORTANT: Do not use more than three shims at any one hole location. Use decreasing numbers of shims in adjacent holes if more than one shim is added to any one hole location.

8.Hook spring onto idler arm bracket. Reinstall belt covers.

If there is mismatch between the blades, the grass will appear streaked when it is cut. This problem can be cor­ rected by making sure the blades are straight and all blades are cutting on the same plane.

72 inch Cutting Units

Groundsmaster 3000/3000–D

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72 inch Cutting Units

Page 223
Image 223
Toro 3000D manual Correcting Cutting Unit Mismatch