1. Adjustment of raking depth
The rake depth can be adjusted by adjusting the declination angle of the rake group, changing the height of the suspension point, cultivating the counterweight or by adjusting the position of the hydraulic lifting control handle.
The adjustment method is: after parking, move the toothed plate forward to a certain notch position to fix it, and then drive the tractor forward. The front and rear harrow groups swing correspondingly relative to the frame. At this time, the declination angle increases and the harrow depth increases. If the rake depth is reduced, the toothed plate is raised, the tractor is reversed, the slide plate is moved backward, and the fixed gear is in the corresponding gap, the declination angle will become smaller, and the rake depth will become shallower. If the above method of adjusting the rake depth still does not reach the predetermined depth, the method of adding weight is used to solve it.
2. Horizontal and vertical adjustment of disc harrow
Horizontal adjustment of the rake frame: The traction rake is generally adjusted horizontally with the adjustment hole on the boom to keep the rake depth of the rake group consistent. Suspension rakes rely on adjusting the length of the right lift rod and upper pull rod on the tractor to keep the rakes horizontal and fore and aft.
Longitudinal and horizontal adjustment: If the hook is hung too high or too low, the depth of the front and rear rows will be inconsistent. You can adjust the different hole positions of the towing hook on the retractor. When the traction hook moves down, the rake depth of the front row of harrows decreases; on the contrary, the rake depth of the front row of harrows increases.
3. Transport clearance of the rake
The transport clearance of the harrow should be in accordance with: the suspension and semi-suspended harrow shall not be less than 200mm, the traction harrow shall not be less than 150mm, and the transport clearance of the disc harrow for tractors below 18kw shall not be limited.
4. The gap between the working edge of the scraper and the concave surface of the rake blade
The gap between the working edge of the scraper and the concave surface of the rake blade should be consistent: when the diameter of the rake blade is less than 550mm, the gap is 1~7mm; when the diameter of the rake blade is >550mm, the gap is 1~10mm.
