Landoll 7431 VT Plus - Manual (Page 77)

OPERATION AND MAINTENANCE
4-9
3. After adjusting the cylinder rod or rods, the radius rod
needs to be adjusted back to a neutral position. This
is accomplished by fully retracting the lift cylinders
and adjusting the radius rod until it fits between the
lifts. Reinstall 1-8 x 4 hex head cap screw, tighten
jam nuts, and 1/2 x 1-1/4 square head cup point set
screw to prevent radius rod from turning.
4. Leveling the VT Plus side-to-side involves leveling
the wing frame to the center frame. The unit should
be level side-to-side when operating in the field.
5. To level the unit:
a. Verify that all tires are properly inflated, and that
the center radius rod adjustment has been
properly set.
b. With the implement unfolded, raise the unit to
fully extend the lift cylinders. Continue to hold the
tractor lever 30-60 seconds to insure that the
cylinders are fully extended and the rephasing lift
system has been purged of air.
c. Lower the unit until the disc blades are
approximately 1” off the ground.
d. On the center frame, measure the distance from
the welded washer to the top side of the frame
(See Figure 4-9.)
e. Measure the same distance on the wing frame.
The wing frames are generally set to the same
distance or slightly higher than the center frame.
The 7431-20 requires adding 3/4” to the
measurement shown in Figure 4-9 and
measuring to the top of the spindle tube on the
wing lift as shown in Figure 4-11. The 7431-23
should measure the same all the way across the
machine. The 7431-26/29 requires adding 5/16”
to the center frame measurement for the wings if
equipped with 380/55R-16.5 tires. The 7431-33
requires adding 5/8” to the center frame
measurement for the wings due to the larger
tires.
f. Adjusting the anchor at the base end of each
wing lift cylinder sets wing frame height (See
Figure 4-10.)
6. An adjusting wrench is provided to make this
adjustment. It may be necessary to lower the wing to
the ground and relieve weight on the cylinder anchor
to make this adjustment. If required, fully raise the
implement, lower to just above the ground, and
re-verify measurements. Repeat as necessary and
securely tighten the cylinder anchor when complete.
Figure 4-9: Leveling from Side to Side
Figure 4-10: Wing Lift Adjustment
Figure 4-11: 7431-20 Wing Lift Adjustment
MEASURE
7431levelmeas
BASE END
ADJUSTMENT
WING
FRAME
3-3/4 x 10
HYDRAULIC
CYLINDER
WING LIFT
WHEEL
ASSEMBLY
7431wingliftadj
MEASURE
MEASURE TO
TOP OF ROUND
TUBE
7431-20-wing-adj