Detailed Explanation of Adjustment Methods and Hydraulic System Adjustment Requirements for the New Reversible Plow

The reversible plow is an agricultural machine. The reversible plow requires little investment, delivers quick results, has a long service life, a simple overall structure, is easy to operate, and is easy to maintain, making it a good helper for farmers. So what adjustment methods are there when using a reversible plow? What are the requirements for adjusting the hydraulic system?

Adjustments needed during use of the reversible plow:

(1) Correct hitching method.

Before tilling with the reversible plow, a three-point hitch is needed. Install the two lower lift arms onto the two lower hitch lugs of the plow, then attach the central tie rod. Be careful to center the plow on the exact center of the tractor. The method is to adjust the two lift arms so that the dimensions to the inner sides of the tractor's large tires are symmetrical and equal, then tighten the turnbuckle nuts on both sides to prevent the plow from swinging left and right during plowing, which would cause uneven ridge closing.

(2) Adjusting the central tie rod.

Before adjusting, first plow one pass along the edge of the field. On the return trip, adjust after the tractor tires run in the furrow. If the front share is deep and the rear share is shallow, loosen the central tie rod so that the rear share of the plow frame tills deeper and the front share tills shallower; conversely, tighten the central tie rod so that the plow frame stays parallel from front to rear.

(3) Adjusting the plowing depth of the reversible plow.

The rated plowing depth of the reversible plow is 20-30cm. When measuring, clean the bottom of the furrow, place a straight wooden strip parallel to the untilled ground, then measure vertically with a straight ruler. If the plowing is too shallow, adjust the limit bolt of the limit support on the depth wheel fixing plate, shorten the bolt, and tilt the depth wheel backward so that the plow frame lowers, achieving the goal of increasing depth. If the plowing is too deep, exceeding 30cm, use the same method: lengthen the support bolt so that the depth wheel tilts forward, raising the plow frame and achieving shallower plowing. Note that after adjusting the length on one side properly, the bolt on the other side must also be adjusted to the same length. In addition, the left and right supports on the fixing plate can be adjusted to move up and down to adjust the depth of the depth wheel.

(4) Method for adjusting the limit plate bolts of the reversible plow frame.

The limit plate adjustment bolts on both sides of the hitching frame crossbeam of the plow are used to adjust the left-right balance of the plow frame. During plowing, use the ground level as a reference to observe whether the plow frame is parallel. If it is not parallel, tighten or loosen the adjustment bolts to adjust the parallelism of the plow frame. Note that after adjusting one side, the other side must also be adjusted in the same way to achieve consistent plowing depth when turning left and right. When not tilling, it is normal for the plow frame not to be parallel and to have a certain slope.

(5) Adjusting the reversible plow when it has difficulty penetrating the soil.

First check whether the hitching (connection point) between the tractor and the plow is too high. If it is too high, lower it to a suitable depth for the plow share to enter the soil, then appropriately shorten the central tie rod length to increase the entry angle of the plow share. The position of the depth wheel can also be moved backward, from the position corresponding to the second plow standard to the position between the second and third plow standards. In addition, if the thickness of the plowshare edge exceeds 3mm, it must be forged or ground, otherwise it will also be difficult to penetrate the soil.

(6) Adjusting for easy deviation of the tractor during tillage.

First adjust the hitching of the reversible plow so that the three-point hitch is at the exact center of the tractor and ensure that the dimensions of the two lift arms to the inner sides of the tractor's large tires are consistent. Then adjust the spacing of each plow standard on the plow frame to achieve the required uniform dimension. For the 435B model, the spacing between two adjacent plow standards is 7cm.

Adjustment of the hydraulic system for the reversible plow

Because the reversible plow has a more complex oil circuit structure than other plows, there are certain requirements for adjusting its hydraulic system. The specific requirements are as follows:

The adjustment of this reversible plow's hydraulic system is mainly the adjustment of the reversing valve's reversal timing. Generally speaking, this timing should be when the plow frame has rotated 900, and the rear shaft of the oil cylinder, the front shaft of the oil cylinder, and the rotating shaft are in the same plane (that is, the “dead point” position). If the reversal moment differs too much from this timing (that is, too early or too late), the plow frame will inevitably stop at the 900 position and be unable to turn 1800. Adjusting this moment is generally achieved by adjusting the position of the reversing fork shift lever. For some plow models, the reversing fork shift lever is screw-locked, so the locking bolt can be loosened. Turn the shift lever a small angle, lock it again, and then test the plow's reversing performance. If it still cannot reverse, continue adjusting until it can reverse smoothly. For plows where the shift lever is a welded component, a sleeve must be used to pry the shift fork rod for adjustment.

Warm reminder: If the reversible plow frame stops before the “dead point” position, it indicates that the reversal is early, and the reversing fork shift lever must be adjusted in the direction opposite to the plow frame's reversing direction; if the plow frame stops after the “dead point” position and then returns to the 900 position, it indicates that the reversal is lagging, and the reversing fork shift lever must be adjusted in the same direction as the plow frame's reversing direction.