How and with what to lubricate the shafts in the mower bar

Many new brush cutters, even those sold assembled, do not have lubricant on the rod shaft. As a result, it heats up, wears out, and a slight whistling rattle is gradually added to the sound of a running motor and vibration appears. To protect equipment from premature wear, just take 10 minutes and simply lubricate the shaft.

Materials:

• lubricant for CV joints, preferably with molybdenum disulfide;
  
• cloth;
  
• rubber gloves if you want to avoid getting your hands dirty.

Disassembly and lubrication

First you need to disassemble the bar. In a conventional lawnmower, to do this, it is enough to disconnect it from the upper and lower gearbox.


If the scythe has a collapsible rod consisting of two parts, then this is even simpler. All you need to do is remove the coupling in the center and separate the halves.



After disassembly, 2 shafts easily fall out, while the rod casing does not need to be removed from the gearboxes.




If the scythe has already been working, then when examining the shaft, or shafts in the case of a collapsible rod, you can notice abrasions from the centering bushings. Such places need lubrication.

A small amount of lubricant should be squeezed onto a cloth or fingers and the shaft should be treated without skipping. It is applied in a thin layer, but everywhere.It is necessary to pay special attention to the slots, since they bear the highest load, especially when the scythe knife hits stones and other objects.




The lubricated shaft is inserted back into the forestay with a slight twist. This will ensure that some of the excess grease remains on the centering bushings where it should be. Rotation will also help the splines fit into their seat on the gearboxes.




If a straight brush cutter with a non-removable bar is being serviced, then it is simply attached back to the gearboxes. In the case of a two-piece rod, the short shafts are each inserted into its own half. After this, the parts of the rod are joined in the center. If their splines do not hit, then you can simply turn the lower gearbox by hand. Next, the docked rod is clamped back with a coupling.



If you use the lawn mower infrequently, this type of maintenance of the rod should be carried out every season. The lubricant used for CV joints withstands high temperatures well, which eliminates oil drips during long-term operation of the scythe. The same composition can also be used to lubricate gearboxes. It can be pressed into them with a syringe if the tube does not have a spout. The frequency of lubrication of gearboxes is higher than that of the shaft. Manufacturers usually recommend doing this every 5 engine hours.

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