I. Thresher Not Threshing Cleanly – 5 Common Causes & Solutions

1. Drum speed too low

• Check if the belt is loose or slipping; tighten the belt.
• Unstable voltage or thin wires also reduce speed; use short, thick copper wires.

2. Feeding too much or too fast

• Feed evenly, in small and frequent batches.
• Do not stuff large bundles forcefully, as the machine cannot process them fully.

3. Grain too wet or immature

• Air-dry the grain before threshing if possible.
• Feed wet grain more slowly and increase the air volume appropriately.

4. Excessive threshing clearance

• Narrow the clearance properly.
• Clearance varies by crop; wheat requires a slightly smaller gap than rice.

5. Worn or aging blades / tooth bars

• Replace threshing teeth or tooth bars.
• Must replace severely worn parts, as adjustments alone will not help.

II. Quick Fix Steps for Poor Threshing

• Stop the machine and check belt tension.
• Slow down the feeding speed.
• Reduce the threshing clearance appropriately.
• Inspect threshing teeth for wear.
• Air-dry overly wet grain before threshing.

III. One-Sentence Summary