Service Manual

Service Dealer’s Guide to Great Quality of Cut 4 - 3
Checking and Adjusting the Blade Level
Measuring Blade Level
1. On products with inflatable tires, check the tire
pressure. Tires are commonly over inflated for
initial shipment. Make certain that the pressure
has been lowered to the correct level for operation
and that the tires are very close to the same (see
the Operator's Manual). If the range is 10-15 psi,
do not have some tires at 10 psi and others at
15 psi. Keep them near the same pressure.
Note: some products may have different
recommended pressure for the front tires and the
rear tires. Always check the Operator's Manual for
the correct pressure.
2. Make a simple sketch of the mower housing to
use for recording measurements. Show the
outline of the mower and the blade(s). Leave a
space to write in your measurements. Each blade
must be measured at the 12, 3, 6, and 9 o'clock
positions (Figure 14 and Figure 15).
Figure 14
sketch1.TIF
Figure 15 sketch2.TIF
3. If the desired height of cut is known, make your
measurements at this setting. If this is not known
set the mower in the middle of its height of cut
(HOC) range.
4. VERY IMPORTANT: When you take the
measurements, rotate the blade and use the
SAME blade tip for measuring. Mark the blade
with a piece of tape. It is not uncommon for there
to be a slight difference between the two ends of
the same blade. If you are working on a multiple
blade mower, repeat the process with each blade.
5. If you are using the measuring tool (Figure 16),
position the blade tip. Then place the tip of the tool
under the tip of the blade and press the base of
the tool on the floor. Read the measurement and
note it on your sketch. Repeat in all 4 positions.
Figure 16
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