Rev C Doc 6001288 (01-20285) 27 of 39
E. LIMIT CAMS
Gate operator limit cams are factory adjusted for 90° arm swing, and never need to be adjust in the field.
However, if long-term use requires replacing the limit cams, use the following procedure to install and adjust
the replacement limit cams
• Remove old limit cams by loosening the locking screws and removing cams from the shaft.
• When installing replacement limit cams, ensure that the limit cams are centered over their
corresponding limit switches.
• Small adjustments are magnified by the length of the gate.
• To avoid damage to the gate and gate operator due to the gate overrunning its limits, perform
the following steps carefully:
1. REPLACING AND ADJUSTING LIMIT CAMS IN A TYPICAL INSTALLATION
Figure 10. Setting Limit Cams for a Typical Installation.
1. Make sure that switch S1 is set to the “Left” position.
2. Turn on gate operator power switch.
3. Using manual CLOSE and STOP, move the gate to its proper closed limit position.
4. If not already loose, loosen the locking screw on the left limit cam and turn the cam counter-
clockwise until it just barely closes the limit switch.
5. Tighten the left limit cam locking screw.
6. Using manual OPEN and STOP, move the gate to its proper opened limit position.
7. If not already loose, loosen the locking screw on the right limit cam and turn the cam clockwise
until it just barely close the limit switch.
8. Tighten the right limit cam locking screw.
9. Open and close the gate to check the limit cam settings. If required, readjust the limit cams
until they are set properly.
