S
ection
6— M
aintenance
& a
djuStMentS
30
Adjustments
Seat
Refer to the Assembly & Set-Up section for instructions on
adjusting the seat.
Adjusting Drive Control Levers
Refer to the Assembly & Set-Up section for instructions on
adjusting the drive control levers.
Leveling the Mower Deck
When correctly adjusted the mower deck should be level side to
side, and the front of the deck should be approximately 1⁄4” lower
than the rear of deck.
NOTE:
Check the tractor’s tire pressure before performing any
deck leveling adjustments. See the tire side wall for proper
inflation pressures.
Side to Side Leveling
1.
Park the mower on a flat paved surface, engage the
parking brake, shut off the engine, remove the key from
the ignition switch, disconnect the spark plug wires and
using the deck lift pedal, position the mowing deck into
the 4” height of cut position. (The 4” height of cut position
is recommended in order for one to see and obtain a
measurement. Any height of cut position is acceptable as
long as a proper measurement can be taken.)
2.
Measure blade-to-ground height at the front tip of the
right blade. To obtain an accurate measure, align blades in
parallel with mower centerline, (i.e. front to back).
3.
Measure blade-to-ground height at the front tip of the left
blade. Be sure to measure at the blade tip with the blades
arranged in proper position.
4.
Adjust the eyebolt at the left front of the deck so that the
blade-to-ground height at the right front blade tip matches
that of the left front blade tip. This is done by loosening the
jam nuts on the eyebolt and tightening the upper nut to
raise the deck and loosening the nut to lower the deck. The
right front blade tip height is fixed so you must adjust the
left front tip to match it. See Fig. 6-3.
Eyebolt
Jam Nuts
Figure 6-3
5.
Once the proper adjustment is made, re-tighten the jam nuts.
Front to Back Leveling
1.
Measure the blade-to-ground height at the right rear blade
tip. Again be sure to measure at the blade tip at the rear of
the right blade when aligned along the mower centerline.
The blade-to-ground height at the rear of the blade tip
should be 1⁄8” to 1⁄4” higher than the front tip. This is referred
to as blade pitch. The same height difference should be
true for the left blade, measured front and back. The pitch
should not exceed 1⁄16
” if cut height is below 1-
1⁄2”.
2.
Loosen the jam nuts at the rear left and right of the deck
horizontal threaded rods. Refer to Fig. 6-3.
3.
Start at the rear right to raise the rear of the deck, tighten
the rear outer jam nut to raise the deck or loosen the rear
outer jam nut to lower the rear of the deck.
4.
Adjust the rear jam nut at the rear left to take the “slack”
out of the threaded rod.
5.
Tighten both inner jam nuts to secure the deck adjustment.
6.
The final adjustment would be to take the “slack” out of
the left rear linkage if the rear of the deck was raised by
adjusting the jam nuts on the eyebolt. Loosen the jam nuts
and tighten the upper nut to remove “slack”.
7.
In many cases it will be necessary to adjust deck height using
both eyebolt adjustments and pitch adjustment to achieve
the correct blade-to-ground heights. If you remember that
the front right blade tip adjustment is fixed and you level to
that height, adjusting the decks will be simplified.
5.
Once the deck is level one may find that the height of cut does
not match the height of cut indicator. A final adjustment may be
made by lowering or raising the height of cut link accordingly.
To raise the deck: remove the shoulder bolt mounting the
height of cut link to the lift handle and reassemble the shoulder
bolt in the lowest of the three holes. To lower the deck: remove
the shoulder bolts mounting the height of cut link, flip the
height of cut link around and reassemble the shoulder bolts in
the top of the set of three holes and the bottom hole.
Adjusting the Belt Tension
To increase the tension on the belt, loosen the jam nuts on the
deck rods, then tighten the flange nuts until a ten-pound pull with
a spring scale deflects the belt about 1⁄2”. Then re-tighten the jam
nuts to secure in place. See Fig. 6-8.
Deck Rods
Flange Lock Nuts
Jam Nuts
Figure 6-4
