General Maintenance and Troubleshooting
SM 6495, Rev. 7, December 2008 3-3
3. The contact pressure should be measured close to the contact tip. The pressure of these contacts
should be 1/2 to 3 lbs. Heel preloading is allowed (heel spring pressure is allowed against the
lower portion of the cam and should always remain in contact with the cam).
4. Make sure the resistance of each contact does not exceed 0.03 ohms (30 mohms) when closed. If
needed, burnish the contacts with 600 grit sandpaper.
3.2.4. Electrical Assembly
To remove the electrical assembly (Figure 5-10, Figure 5-11, Figure 5-12, or Figure 5-13), follow
these steps.
WARNING
To avoid bodily injury when performing any maintenance on the Model
95 Gate Mechanism, the following steps MUST be taken:
1. Position the gate arm of the Mechanism being serviced in the
desired position (See Section 3.2.9),
2. Electrically disconnect the Mechanism being serviced by
loosening the gold nut on Terminal 5B, and
3. Remove and insulate the B12 (or B24) supply wire from
Terminal 2C.
Removing power from the gate will cause the gate arm to drop. The
lights will also flash if power has not been removed from them. When
power is restored, the gate arm and lights will return to normal
operation.
1. Ensure external power is off. Remove external power and control wires.
2. Remove (white) brake wires from 1B and 4B on 12-volt systems and 2B and 4B on 24-volt
systems. Remove (red and black) power wires from T4 and T5.
3. Loosen and slide No. 1 cam and No. 6 cam inward for access to two top mounting bolts.
4. Remove the seven 7/16” head bolts and one screw that attach the electrical assembly to the
housing.
The electrical assembly is replaced by reversing the above steps.
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