General Maintenance and Troubleshooting
2-16 SM 6495, Rev. 7, December 2008
Figure 2-8 - Torque Increase/Decrease Diagram
2.5.2. Horizontal Adjustment
2.5.2.1. Horizontal Adjustment Using Spring Scale
Lower arm to the horizontal position. At 10 feet from the mechanism output shaft, a spring scale
should read 9-13 pounds when the gate arm is near the 5° position (a 5° rise of the gate arm is
equivalent to 10.5 inches at 10 feet). To adjust, loosen hardware and slide counterweights in or out.
2.5.2.2. Horizontal Adjustment Using Torque Wrench
Lift the arm or hand turn the brake armature until the arm is near the 5° position. Apply an appropriate
torque wrench (J039000-0115 supplied in optional torque wrench kit X467000-03) to the motor shaft
located in the lower-left corner of the inside housing. The torque should read between 17 to 24 in.-oz
(for the torque wrench with the 0-80 scale) or 1.1 to 1.5 in.-lbs (for the torque wrench with the 0-6
scale). If the proper torque wrench is not available, use the spring scale method above. To adjust,
loosen hardware and slide counterweights in or out.
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