Inspecting and Sharpening Blades
1. Raise cutting unit to highest position, shut the en-
gine off and engage the parking brake. Block cutting unit
to prevent it from falling accidentally
.
2. Examine cutting ends of the blade carefully, espe-
cially where the flat and curved parts of the blade meet
(Fig. 22–A). Since sand and abrasive material can wear
away the metal that connects the flat and curved parts of
the blade, check the blade before using the machine. If
wear is noticed (Fig. 22–B), replace the blade: refer to
Removing Cutter Blade.
DANGER
D A worn or damaged blade could break
and a piece of blade could be thrown
D A thrown piece of blade could cause se-
rious personal injury or death to
operator or bystanders.
D Inspect blade periodically for wear or
damage.
D Replace a worn or damaged blade.
into operator’s or bystander’s area.
3. Inspect cutting edges of all blades. Sharpen the cut-
ting edges if they are dull or nicked. Sharpen only the top
of the cutting edge and maintain the original cutting
angle to make sure of sharpness (Fig. 23). The blade will
remain balanced if same amount of metal is removed
from both cutting edges.
4. To check blade for being straight and parallel, lay
blade on a level surface and check its ends. Ends of
blade must be slightly lower than the center
, and cutting
edge must be lower than the heel of the blade. This
blade will produce good quality of cut and require mini-
mal power from the engine. By contrast a blade that is
higher at the ends than the center
, or if cutting edge is
higher than the heel, the blade is bent or warped and
must be replaced.
5. Install blade—sail facing toward cutting unit with
anti–scalp
cup, lockwasher and blade bolt. Tighten
blade bolt to 85–110 ft–lb.
Figure 22
SHARPEN AT THIS
ANGLE ONLY
END VIEW
Figure 23
Groundsmaster 223–D
Page 15 – 17
Rev
. B
Guardian 62 Recycler Cutting Unit
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