Spring binds or “crunches” as door lowered

Torsion spring not able to grow while being wound by the door Spring not stretched while winding Spring needs 2”-3” to grow while it winds See snaking solutions If installed with door up, spring not pre-stretched

Spring “snaking” while being wound

Some “snaking” is normal. Winding cone may not be sliding freely on the torque tube Burrs or dents on torque tube Use a metal file to remove any burrs If torque has significant dents, it may need to be replaced

Spring coming off cone or coils expanding when winding

Spring being wound backward Check winding direction or spring hand Winding should be executed by pulling down on the winding bar from the roof of the trailer Wrong handed spring installed on wrong side of spring system

One cable is slacker than the other

Ramp door is not level or is racked Straighten the ramp door Always install spring system when the ramp door is on level ground. Take care when removing slack from the cables prior to winding. It is easy to raise one corner of a light door. If racked, contact trailer manufacturer

Cables loose tension when door closed

Not enough winds on the spring(s) to rotate the drum enough times to pick up all the cable Add more winds to the spring(s) Measure the length of the cable from the cable drum to the attachment point in inches. Divide that length by 13 and add 1. That is the minimum number of turns […]

Ramp Door Hard to Open

Spring system is pulling on the ramp door when it is closed Too many winds on spring(s) Reduce springs winds, but ensure door is still balanced and there are enough winds to wind up all the cable

Ramp Door Too Light or Raises by Itself

Spring torque is too large for the ramp door weight. Difficult problem to solve Reduce lift capability of the spring(s) If dual system, loosen the winding cone set screws for one spring and only use one spring for the lift. Move the cable attachment point on the ramp door closer to the trailer opening. Reducing […]

Ramp Door Too Heavy to Lift

Spring torque is not sufficient to counterbalance the ramp door weight Add more spring torque Up to 2 additional turns to the spring(s). More than 2 turns can significantly degrade the life of the spring Replace the spring(s) with higher torque spring(s)