The F0903 Guard Bar Interlocks are designed to pneumatically lock the guard bar, which prevents access to the system’s discharge valves, except when loading or unloading. They can also prevent movement of the vehicle by interlocking to the brakes during loading and discharge.
One unit is required per Guard Bar.
The Guard Bar should not rest on the interlock. Separate provision should be made for this refer to the installation sheet for details.