Why are my oster clipper blades pulling instead of cutting?

Have you tried flipping the removable part of the teeth the other side? I had a friend who had the same issue and I took it apart and put it back together myself and I flipped it and it stopped pulling hair , im gonna use icons on how he put it the machine and the removable teeth (( when it was supposed to be like () the teeth blade that removes is slightly curved, you want it to be like scissors.
you can also look into :

1.Slanted blades
2.The power screw causing the machine to be improperly powered, or
3.The blades that haven’t been oiled.
4.The blade tension is off

most of the time its tension, so you can do as follows:

We will begin by undoing the three screws on the belly so that we can get inside the clipper. As a pro-tip, it’s always good to do this sort of work on a corrugated rubber mat or towel so that you do not lose any screws.

After that, loosen the two screws on the side of the clipper, which you will need a special attachment for as demonstrated in the video Torx or star screw. When you loosen these, they actually turn in the opposite direction as most screws to do so.

These loosen and tighten the tension to the armature to the blades, which is what essentially makes the arm that causes the blades to move right and left. At present, the position it is in is what is causing the poor tension. To create the tension, what we need to do is push down on the right hand of the armature.

Imagine that the armature is a scale, and you are wanting to reach a two pound reading when you push it down. You’ll feel it push back against you, but you want to hold on to reach that proverbial two pound scale reading. Remember: if the tension is too tight, the blades will not be able to move. You want a nice tightness without overdoing it. With that done, what we need to do is go ahead and bolt that straight up once more. At present, it should cut through hair like a hot knife in butter. After a few experiments, you can see that it is running much more smoothly.

For one final experiment, I want to up the power on the Wahl Senior. For this, we want to turn to the power screw as demonstrated in the video. What we basically need to do is bring the armature closer to the motor. The closer the arm is brought towards the motor, the more power you’ll get in your clipper. When it is knocking, you know the arm is on the motor, so just release it off of it very slightly and now the clipper is running at maximum power.