1. The separation needle collides with the door due to several possible reasons: misalignment of the fontanelle, incorrect installation of the planting arm, wear in the inner hole of the crank arm, separation of the upturned needle, excessive diaphragm adjustment, or wear on the pendulum shaft or its lower hole. Remedy: Realign and secure the fontanelle, adjust the planting arm to the correct position, replace the worn crank or chain shaft, repair or replace the separation needle, and replace the pendulum shaft or bearing if necessary.
2. A certain group of planting arms not working may be caused by a broken drive shaft in the chain box or a broken or missing chain. Remedy: Reattach the chain or replace the drive shaft as needed.
3. Issues with the switchboard can occur due to wear on the slider or chute, loose bolts at the ends of the sliding door, deformation of the doorway, excessive lift height, rusted caster wheels, or deformed caster wheel screws. Remedy: Start by replacing the roller and screw. If the slider or chute is severely worn, it should be replaced. Adjust or tighten the door fixing screws. If the door is warped, add a rectangular gasket. If the handle is too high, lift the front end and install a new bumper.
4. A non-working mechanism may result from a worn pin or spiral shaft, or a missing slide sleeve fixing bolt. Remedy: Open the gear cover and replace the worn pin or spiral shaft. If the slide sleeve bolt is missing, reinstall it properly.
5. If the seedling lifting back end is too high, it could be due to a missing or damaged rubber buffer block. Remedy: Use a screwdriver to lift the front end of the handle and install a new bumper.
6. The crucible shaft not rotating may be caused by a fallen ratchet wire pin, worn ratchet groove, a detached pawl or torsion spring, or a shifted crucible shaft. Remedy: Check if the ratchet, pawl, and torsion spring are intact. If damaged, replace them. Then turn the feed screw; if the ratchet turns but the feed shaft does not, the wire pin may have fallen off and needs to be reinstalled.
7. A small rotation angle of the feed shaft is typically due to severe wear on the peach wheel and feed cam. Remedy: Open the gear cover and replace the worn components with new ones.
8. The feed shaft not working may be caused by a damaged or missing positioning key on the peach-shaped wheel, the peach-shaped wheel being stuck with the feed cam, or a broken or missing feed cam wire pin. Remedy: If the parts are misaligned, this is likely due to wear between the shuttlecock and the peach-shaped wheel. Remove the feed cam or peach-shaped wheel and smooth the working surface with a blade. Severe wear requires replacement. If the key or pin is damaged, replace it with a new one.
9. Intermittent operation of the feed shaft may occur due to weak return force from the peach-shaped wheel or feed cam springs, preventing proper return to position. Remedy: Open the gear cover, remove the return springs, and replace them with new ones.
10. A stuck positioning clutch handle can occur when the separation cam wears and gets stuck with the adjustment nut. Remedy: Remove the separation cam and use a grinding wheel or file to smooth the cam face into a rounded shape.
11. Incomplete separation of the main clutch may be due to adhesion between the friction plate and pulley, loose positioning screws causing the clutch pin to shift, or severe wear on the clutch pin. Remedy: Remove the pulley assembly, separate the adhered parts, clean the friction plate with sandpaper, and replace the clutch pin. Tighten the positioning screws securely.
12. Incomplete separation of the positioning clutch may also be caused by improper adjustment of the adjusting nut, slippage between the release pin and nut, wear on the positioning cam, or a broken tension spring (used in fork-type clutches). Inspection method: First, open the positioning and separation cover to check if the adjusting nut is in the right position, whether the nut and pin are slipping, and if the tension spring is broken. If no issues are found, remove the power output shaft assembly and inspect the condition of the teeth on the positioning flange. Remedy: Adjust the nut to the correct position, replace the slipper pin or nut if necessary, replace the tension spring, and if the positioning cam is worn, slightly grind the separating teeth by about 0.5 mm. Severe wear requires full replacement.
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