Landoll 7431 VT Plus User Manual download pdf (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

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Landoll 7431 VT Plus User Manual Page 77

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