Clipper blades loosen and does not cut - Oster Golden A5 2-Speed Universal Motor Clipper 78005-140

SOURCE: Clippers jam and won't cut when trying to use attachments

OIL THE CLIPPERS AND CLEAN THE HAIR OUT REALLY GOOD.

SOURCE: Oster Golden A5 Clippers will not cut

These kinds of clippers are fussy about oiling and dirt. It is essential that the blades be spotless and well oiled FREQUENTLY. Oil after every haircut always. Also, if there is not enough tension on the blades, the hair will slip between the blade and blade guard, getting caught and damaging the blades. Blades should be screwed on tight. Also, it may be time to replace the blade if nothing else helps. These blades do not last very long in my experience especially if not carefully cleaned and oiled.

SOURCE: Cleaning Oster 78004-011 Clippers and blades

OK compressed air is perfect for your clipper, thats all it needs! Take the filters off (at the bottome of the clipper, either side of the cable) periodically and clear from excess fur. Replace. As far as the blades are concerened, Brush the excess furr off with a toothbrush or similar. Slide the cutter (smaller of the 2 blades) to one side (past half way but not all the way off!) clean exposed teeth on both blades with a bit of oil and a toothbrush, push the cutter the other way and repeat. Blade wash's tend to rust the blades, you need a big pot of WD-40. Get a 5 litre tub from the internet, only thing is there, postage will be a killer. I work for a clipper repair, blade sharpening company and we have it delivered by the truckload! Do what you do with the blade wash, but do it in WD-40. Wipe off excess afterwards and dont soak the clipper in any liquid because of electrc shock.
Thats all you can do! When your blades go blunt or clipper needs service repair: www.sheareaseltd.com If I have helped you please tell your friends about our website! Thank you!