Since the invention of air compressors work has been lighter and even a lot faster. While the tasks can be done manually, just imagine how soon can you pump air in a car’s wheel? It is not even just putting air in but the right amount that will be able to carry the load of the car and the passengers for the wheels to run on the road without taking the flat side of the road.
A paint spray gun is often used to give even paint without having the marks of brush strokes. Brush was the normal, manual way to paint and it is possible to paint the old-fashioned way but why stay with such when it can be better? You do not expect your car to be painted with brush, do you?
You may be able to chip pallets little by little if you have all the time in the world. If you have just a few you would perhaps just let them be or give it away with the trash but there are construction companies needing piles of pallets to be ground for easy handling. Vertical grinders are usually used to produce ground pallets which can actually be repurposed like a filler for a garden before giving it top soil. Mixed with garden soil, it actually helps to loosen the earth so it will not be so dense.
Air compressors are very useful these days that no one would want to go back to the old way of doing tasks once they have felt the ease and comfort and speed of the technology. As with other man-made products, though, it is also subjective to wear and tear. Some day you’ll need to replace air compressor parts. Good thing you are not limited to buying just within your vicinity. You can even buy ingersoll rand compressor parts over the internet.