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Adjusting the Blade
Important:
On multi-bladed machines, take care
as rotating 1 blade can cause other blades to
rotate.
To ensure proper operation of the cutting unit, there
must be a 10 to 16 mm (0.38 to 0.62 inch) clearance
between the tips of the side and center mower-deck
blades
(Figure
28).
1.
Raise the cutting unit so the blades are visible
and block the center deck section so it cannot
fall accidentally.
Note:
The wing decks must be horizontal to the
center cutting unit.
2.
Rotate a center and adjoining side blade so the
blade tips are aligned. Measure the distance
between the blade tips
Note:
The distance should be approximately 10
to 16 mm (0.38 to 0.62 inch).
Figure 28
1. Clearance of 0.38 to 0.62 inches (10-16mm)
3.
To adjust distance, locate adjuster bolt on rear
pivot link of the cutting unit
4.
Loosen the jam nut on the adjuster bolt.
5.
Loosen or tighten the adjuster bolts until you
attain a 10 to 16 mm (0.38 to 0.62 inch)
clearance, then tighten the jam nut.
6.
Repeat the procedure on the opposite side of
the cutting unit.
Figure 29
1. Adjuster bolt
(Figure
28).
g223264
(Figure
29).
g009439
2. Jam nut
Correcting a Mismatch
Between the Cutting Units
Due to differences in grass conditions and the
counterbalance setting of the traction unit, a sample
area of grass should be cut and the appearance
checked before formal cutting is started.
1.
Set all cutting units to the desired height of cut;
refer to
Adjusting the Height of Cut (page
2.
Check and adjust the air pressure in the front
and rear tire of the machine to 172 to 207 kPa
(25 to 30 psi).
3.
Check and adjust the air pressure in all of the
caster tires for the cutting unit to 345 kPa (50
psi).
4.
Check the charge and counterbalance pressures
with the engine at
ports.
Note:
Adjust the counterbalance to 2241 kPa
(325 psi).
5.
Check for bent blades; refer to
Bent Blade (page
6.
Cut grass in a test area to determine if all cutting
units are cutting at the same height.
7.
If mower-deck adjustments are still needed,
find a flat surface using a 2 m (6 ft) or a longer
straight edge.
8.
To ease measuring the blade plane, raise the
height-of-cut to 7.6 to 10.1 cm (3 to 4 inches);
refer to
Adjusting the Height of Cut (page
9.
Lower the cutting units onto a flat surface and
remove the covers from the top of the cutting
units.
10.
Loosen the flange nut, securing the idler pulley,
to release the belt tension on each cutting unit.
29
, using hydraulic-test
HIGH IDLE
Checking for a
86).
26).
26).
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