Inspecting And Sharpening A Blade; Correcting A Mower-Deck Mismatch - Toro Groundsmaster 5900 Operator's Manual

Inspecting and Sharpening
a Blade
Service Interval: After the first 10 hours
Every 50 hours
Before each use or daily
You must consider 2 areas of the blade when checking
and servicing it: the sail and the cutting edge. Both
cutting edges and the sail, which is the turned-up
portion opposite of the cutting edge, contribute to a
good quality of cut. The sail is important because it
lifts the grass up straight, thereby producing an even
cut. However, the sail gradually wears down during
operation, which is normal. As the sail wears down,
the quality of cut degrades somewhat, although the
cutting edges are sharp. The cutting edge of the blade
must be sharp so that the grass is cut, not torn. A
dull cutting edge is evident when the tips of the grass
appear brown and shredded. Sharpen the cutting
edges to correct this condition.
1. Position the machine on a level surface, raise
the mower deck, engage the parking brake, put
the traction pedal in N
PTO switch is in the O
engine, and remove the ignition key.
2. Examine the cutting ends of the blade carefully
(especially where the flat and curved parts of the
blade meet) as shown in
Note:
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 mower. If you notice wear,
replace the blade
Figure 145
1. Cutting edge
2. Curved area
3. Examine the cutting edges of all of the blades.
4. Sharpen the cutting edges if they are dull or
nicked (Figure 146).
, ensure that the
EUTRAL
position, shut off the
FF
Figure 145.
(Figure 145).
3. Wear/slot forming
4. Crack
1. Sharpen at the original angle.
Note:
Sharpen only the top of the cutting edge
and maintain the original cutting angle to ensure
the sharpness.
Note:
The blade will remain balanced if the
same amount of metal is removed from both
cutting edges.
Note:
Remove the blades and sharpen them on a
grinder. After sharpening the cutting edges, install the
blade with the anti-scalp cup and blade bolt; refer to
Removing and Installing a Blade (page
Correcting a Mower-Deck
Mismatch
When there is mismatch between the blades on a
single mower deck, the grass appears streaked when
it is cut. You can correct this problem by ensuring that
the blades are straight.
1. Using a 1 m (3 ft) long carpenter's level, find a
level surface on the shop floor.
2. Raise the height-of-cut to the highest position;
refer to Adjusting the Height of Cut (page
3. Lower the mower deck onto a flat surface and
remove the covers from the top of the mower
deck.
4. Rotate the blades until the ends face forward
and backward.
5. Measure from the floor to the front tip of the
cutting edge (record this dimension).
6. Rotate the same blade, so that the opposite end
g006530
is forward and measure it again.
Note:
The difference between the dimensions
must not exceed 3 mm (1/8 inch). If the
dimension exceeds 3 mm (1/8 inch), replace
the blade, because it is bent. Measure all the
blades.
7. Ensure that the deck is level from side to side
and adjust as required.
8. Install the belt covers.
93
Figure 146
92).
g000276
38).