General Maintenance and Troubleshooting
SM 6495, Rev. 7, December 2008 2-1
2. INSTALLATION
WARNING
To avoid possible injury to personnel or local traffic, ensure that
Railroad Standard Operating Procedures are followed during installation
of the gate mechanism and the gate arm.
2.1. Introduction
When installing the Model 95 Gate Mechanism, follow your railroad’s standard operating procedures.
2.1.1. Required Tools
The Model 95 Gate Mechanism is designed to be installed with standard tools. All gate mechanisms
are shipped with a tool kit (N46707001). This kit includes Allen wrenches for buffer and cam
adjustments, other various wrenches, and a hold down pin.
A torque wrench, or a spring scale, or both will be needed to set the counterweights. Union Switch &
Signal offers an optional torque wrench kit (X46700003) that includes a torque wrench and a socket.
2.1.2. Foundations
Standard pre-cast or poured concrete may be used as a foundation for the Model 95 Gate Mechanism.
Examples are given in the AAR Manual, Part 14. Bolt spacing is a standard four-bolt pattern spaced
11-11/16” on center for 5” junction box.
2.2. Mast Mounting
See Section 2.2.1 for Mounting Sidewalk Gate Mechanisms.
To mount the mast, follow the steps below.
1. Erect mast with junction box.
2. Mount pivot clamp (X46705402). Position top of clamp 42-3/4” above top of the foundation. (The
exact height may need to be adjusted slightly in order to meet the required height of the gate arm
above the roadway.)
3. Install T-bolts (X46705401), included with mechanism) in back of gate mechanism with threaded
portion toward the mast. Place the gate mechanism on top of support clamp. Fasten to mast with
clamps and supplied hardware.
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