When performing the tug test, when should you stop?

When performing the tug test, when should you stop?

• A. As soon as you feel resistance from the trailer.
• B. When you hear a squeak from your trailer tires.
• C. As soon as the trailer brakes pop out.
• D. When your spotter gives you the proper hand signal.

Answer: (A)

The tug test is used to verify that the trailer is properly coupled and that its brakes are released. You pull the tractor forward slowly a short distance to feel for the trailer’s movement in relation to the rig. Stop as soon as you feel resistance from the trailer. That resistance means the coupling is secure and the trailer is ready to move with you without pulling too far. If you push past that point, you could strain components or cause unnecessary wear, and you might miss a mis-coupling. The other cues aren’t reliable indicators of proper coupling—squeaks can come from unrelated issues, waiting for the brakes to pop out tests the braking system rather than the hitch, and waiting for a spotter’s signal isn’t the threshold you should use for stopping the test.

The tug test is used to verify that the trailer is properly coupled and that its brakes are released. You pull the tractor forward slowly a short distance to feel for the trailer’s movement in relation to the rig. Stop as soon as you feel resistance from the trailer. That resistance means the coupling is secure and the trailer is ready to move with you without pulling too far. If you push past that point, you could strain components or cause unnecessary wear, and you might miss a mis-coupling. The other cues aren’t reliable indicators of proper coupling—squeaks can come from unrelated issues, waiting for the brakes to pop out tests the braking system rather than the hitch, and waiting for a spotter’s signal isn’t the threshold you should use for stopping the test.