Wheat combine harvesters will inevitably malfunction when working, so that the maintenance of the wheat combine harvester is particularly important during the whole wheat harvest process. In the maintenance should pay attention to the following points:
1. Rivets in a harvester. If the knife assembly is used, the rivets are generally made by cold extrusion and should not be heated when riveted. If heated, the material strength will be reduced. After riveting, the forming punch is used to strengthen the blade and the knife bar.
2. Vulnerable parts, especially pins, sheets, sleeves, horns. Replacement and repairs cannot be replaced by adding more butter during maintenance, and parts that wear to the limit for a prolonged period of time can cause a reduction in other mechanical life.
3. There is no shaft repair for balancing machines. In the repair of various shaft types to be balanced, a thrust bearing can be mounted on one end of the shaft and clamped on the three jaws of the lathe, and the other end can be used to withstand the top. If the lathe is short, the center rack can be used to clamp the other end and mounted on the shaft. The bearings are calibrated so far. In the case of weights, tighten them with screws. Try not to use counterweights by electric welding.
4, in the maintenance due to the variety of materials, it is not easy to purchase, can be used for the processing of old shafts. At present, most shafts in China are mainly 45# carbon steel. If quenching and tempering are required, in the case of poor conditions, oxygen and earth furnaces can be used to heat the required parts to red in black water and put it in brine. And set.
5. Pull the oil groove in the sleeve hole as much as possible when processing the set of parts. It is very difficult to refuel in some parts of the harvester. Wherever it is difficult to add oil, butter and heavy oil can be used, with the exception of nylon sleeves. Where nylon sleeves are used, it is best not to replace them with cast iron, copper or aluminum, because nylon sleeves do not deform under certain impact.
6, belt pulley and shaft key and keyway repair. Should ensure that the size does not change in advance, ten thousand can not increase the size of the key, otherwise it will affect the strength of the shaft, the keyway on the shaft can be used to repair welding a key groove in the opposite direction of the old key, the key groove on the pulley can be used ( The method of transition fitting), after inserting, uses the countersunk screw to tap the tight key in the sleeve seam.
7, the maintenance of the hydraulic part of the harvester. Remove the distributor and the flow reduction valve, etc., and use the air pump to press each tube. The hydraulic oil should be filtered and vented when it is re-installed. The repair of the assembly hydraulic pressure is mainly the seal, and the seal is best to be removed after the replacement. new.
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