LiftMaster SL585UL Installation Manual - Page 22

Adjust the Clutch, Readjust the Limits

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ADJUSTMENT Readjust the Limits To readjust the limits, follow the "Set the Limits" and "Set the Force and Run Distance" instructions above. It is important that the force and run distance are set after every limit readjustment. Adjust the Clutch The friction clutch system is not an automatic obstruction sensing device. It only serves to minimize damage to the gate operator and gate, and to help minimize vehicle damage. The clutch mechanism must be adjusted properly. During the installation of the operator, you must tighten the clutch spring lock nut so it is tight enough to operate the gate, yet loose enough so that if the gate meets an obstruction, the clutch will slip. 1. Loosen set screws of torque adjustment nut on the gear reducer output shaft. 2. Back off torque nut until there is very little tension on the Belleville washers. 3. Tighten torque nut gradually until there is just enough tension to permit the operator to move the gate smoothly through a complete open/close cycle, but to allow the clutch to slip if the gate is obstructed. 4. Re-tighten the set screw that is directly over the flat portion of the shaft. 22

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22
Readjust the Limits
To readjust the limits, follow the “Set the Limits” and “Set the Force and Run Distance” instructions above.
It is important that the force and run distance
are set after every limit readjustment.
Adjust the Clutch
The friction clutch system is not an automatic obstruction sensing device. It only serves to minimize damage to the gate operator and gate, and to help
minimize vehicle damage. The clutch mechanism must be adjusted properly. During the installation of the operator, you must tighten the clutch spring lock
nut so it is tight enough to operate the gate, yet loose enough so that if the gate meets an obstruction, the clutch will slip.
1.
Loosen set screws of torque adjustment nut on the gear reducer output shaft.
2.
Back off torque nut until there is very little tension on the Belleville washers.
3.
Tighten torque nut gradually until there is just enough tension to permit the operator to move the gate smoothly through a complete open/close cycle,
but to allow the clutch to slip if the gate is obstructed.
4.
Re-tighten the set screw that is directly over the flat portion of the shaft.
ADJUSTMENT