Common Combine Harvester Troubleshooting and Solutions

A combine harvester is a type of agricultural machinery that integrates harvesting, threshing and impurity removal. China has a traditional smallholder farming economy, so mechanized agriculture got off to a late start. Most farmers are unfamiliar with some agricultural machinery and do not know how to solve problems when they arise, especially with relatively precision equipment like combine harvesters. Below is an introduction to common faults of combine harvesters and their solutions.

1. Nothing comes out of the threshing outlet

The threshing outlet is where the harvested product is discharged after the grain has been cleaned of impurities; under normal conditions it works together with the bagging function. So if nothing comes out of the threshing outlet while everything else is normal, it is very likely that the threshing cylinder is blocked. The cause of the blockage may be too much weed material inside the cylinder, which seriously hinders the rotation of the cylinder, so that the engine cannot drive the roller shaft.

Solution: At this point it is best to stop the machine promptly, then clear the debris from inside the cylinder, and then appropriately increase the distance between the roller shaft and the wall. When starting again, the harvesting speed should be reduced a little to avoid the problem recurring because too much material is fed in.

2. Grain piles up in front of the header

Grain piling up in front of the header means at the inlet after harvesting; if you are not careful here, it is very easy for the harvested material to pile up. There are generally two causes: first, the harvesting speed is too fast and the inlet cannot take the material in promptly, causing interwoven accumulation. Second, the distance between the pusher and the inlet is relatively large, so the material being pushed cannot fully enter the opening, leaving residue that causes accumulation.

Solution: At this point you should appropriately adjust the pushing distance of the pusher so that it pushes the material closer to the inlet.

3. A large amount of missed cutting

Missed cutting is a problem that often occurs with combine harvesting, that is, a relatively large amount of uncut material remains where the harvester has passed, or the harvesting is not thorough.

Solution: First check whether the blade is sharp and see whether it is caused by nicks in it. Next check whether the cutting range of the blade covers everything fully and whether there are blind spots that cannot be harvested. Also check whether the height of the blade is too high (or too low), which prevents harvesting; this is especially important to check clearly when harvesting along the direction in which the grain has lodged.

4. Incomplete threshing and a lot of impurities

Everyone should pay especially close attention to this problem, otherwise it will become a rather troublesome matter later on.

Solution: When this problem occurs, first check whether the parts inside the thresher are damaged; bending of some small components or a dent in the wall may cause this phenomenon, and if so, replace them promptly. If the equipment is intact, then the roller shaft may be rotating too fast, so that the harvested material cannot strike the threshing plate; you can appropriately reduce the rotational speed of the roller shaft or reduce the gap between it and the threshing plate.

5. The knife bar breaks and comes off

The harvesting blades are extremely prone to problems during harvesting; they can come off because they were not secured properly during harvesting, and they can also be damaged by hard protruding objects in the field that no one noticed.

Solution: When not in use, everyone should also take good care of the blades to prevent them from rusting and the like. Second, before every harvest, carefully check the fixing screws once, and it is best to twist them a little to see whether they are loose. When harvesting, it is best to choose relatively flat terrain, or you can check the protruding places around the land in advance so that you know what to expect and avoid hitting them.

6. The harvested crop falls forward

Harvested crop falling forward is the problem most likely to occur when harvesting rice and the like, and it is mostly caused by a relatively low harvesting speed.

Solution: At this point you need to appropriately increase the harvesting speed, lower the cutting blade a little, and tighten the belt a bit, so as to ensure the rotational speed of the blade and ensure better harvesting.

The above is a brief introduction from Tuliu.com on the common faults of combine harvesters and their solutions. Everyone should pay more attention to these problems when operating, and it is best to check and clean after harvesting a certain area, so that the machine can run more effectively.