Chain-link fences must have a tense wire mesh running along the posts, or the fence is worthless. Unfortunately, sagging mesh material between the posts is a common issue. Leaning posts, heavy objects slamming into the mesh and heavy winds can cause the tension to slack in the mesh. Repairing the fence wire tension may look like a professional job, but with the right tools you can accomplish this task in an afternoon with minimal physical exertion.
Slide a tension bar vertically at one end of the fence. Secure the bar to the terminal post using five equally spaced tension bands. Tighten them with a pair of pliers.
Slide another tension bar through the fencing at alternating links through the middle of the fence mesh 20 feet away from the final terminal post in the fence line.
Tie the top of the fence wire to the top post of the fence every 20 feet, using rope.
Attach the single-hooked side of the fence puller to the terminal post and the multiple-hook side of the tension puller to the other hooks of the tension bar.
Move the crank on the fence puller, using a socket wrench to pull the fencing tight. The fencing should move no more than a 1/4 inch when squeezed by hand once it's properly tensioned.
Add another tension bar at the final terminal post where the wire is tense. Apply five tension bands from the tension bar to the post.
Attach the stretched fencing to each post along the line with tie wires to keep the fencing in place, and then remove the fence puller.