SM-6495 - Ansaldo STS

General Maintenance and Troubleshooting2.4. Spring Buffer AdjustmentThe Model 95 Gate mechanism is equipped with adjustable spring buffers to control the horizontal andvertical rest positions of the gate.2.4.1. Horizontal (Down) Buffer Adjustment10. Remove the aluminum buffer cap located on the top of the mechanism with the Allen wrenchsupplied in the Model 95 tool kit (N46707001).11. Loosen the lock nut of the buffer nearest the mechanism door (furthest from the road) and turn thethreaded sleeve.CAUTIONIf the spring buffer is adjusted down too far, it can hit the segment gearand cause damage to the buffer.12. Adjust until arm is properly leveled.13. Tighten the lock nut and replace gasket and cap.2.4.2. Vertical (Up) Buffer Adjustment1. Remove the aluminum buffer cap located on the top of the mechanism.2. Loosen the lock nut of the buffer furthest away from the mechanism door (nearest the road) andturn the threaded sleeve.3. Screw the buffer to just touch the segment gear. Then back off three turns. This will giveapproximately a 1/16” to 1/8” gap between the buffer stop and the segment gear.4. Tighten the lock nut and replace gasket and cap.2.5. Torque Testing and Adjustments2.5.1. Torque Testing (Not required for Sidewalk Gate Mechanisms)For the Gate Mechanism to operate properly, you must test the torque values of the gate arm. Thetorque must be calibrated properly to reduce mechanical stress that could reduce the effective lifetimeof the mechanism. Follow the torque values as shown in Table 2-1. Refer to Sections 2.5.2 and 2.5.3for details on horizontal and vertical position torque testing. Figure 2-8 should be used to decide whichway to move the counterweights for the torque adjustments.SM 6495, Rev. 7, December 2008 2-15