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Checking and Correcting Blade 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 long carpenters level, find a level sur-
face 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. Loosen flange nut securing idler pulley 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. If dimension exceeds 1/8 of an inch, replace the
blade because it is bent. Make sure to measure all
blades.
Counterbalance Adjustment
NOTE: The test port is used to check hydraulic circuit
pressure. Check pressure with lift lever in FLOAT posi-
tion, engine running at high idle and hydraulic oil at its
normal operating temperature (Fig. 4).
NOTE: The counterbalance has been pre–set at the fac-
tory and should not require adjusting. Rotating manifold
screw to increase or decrease pressure will increase or
decrease counterbalance (Fig. 4).
Normal counterbalance setting is 100 psi. Adjustment
range is 80 – 130 psi.
Groundsmaster 223–D
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 lower than the outer blades.
proceed to step 7 and add shims between spindle hous-
ing 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. Readjust idler pulley. Reinstall belt covers.
1
Page 15 – 7 Rev. B
Figure 4
1. Adjusting screw
2. Test port
Guardian 62 Recycler Cutting Unit
2
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