RPM ELK Siren Replacement

Use orange safety cones or equivalent based on site-specific safety practices.

Move LD-260 switch to OFF position. The PWR ON LED will turn off.

For vehicle monitors: Open the upper RPM door

For train monitors: Open the control cabinet 

Using a flathead screwdriver, disconnect wires:

Red wire - Pin 8

Black wire - Pin 9

Using cutter pliers, remove associated fasteners from TB4 Pin 8 and Pin 9. 

Turn screw counterclockwise using an 11 mm wrench.

Lower outer casing approximately ½” (12 mm), pull casing away from door approximately ½” (12 mm), and lift outer casing up and away from housing assembly.

Pull the siren away from the housing assembly. Ensure when removing to pull straight away from the housing. 

Using an adjustable wrench, hold nuts on the inside of the door while using a medium Phillips screwdriver to turn hardware counterclockwise. 

Use tag or tape. Include date of removal, description of failure symptoms, country, site, and lane number. Dispose per Nuclear Smuggling Detection and Deterrence (NSDD) guidance or contractual requirements.

The tabs on the outer casing must fit in the U-shaped slot on the housing assembly. Slide the outer casing onto the assembly until it is approximately 1/2” (12 mm) from the face of the door. Then drop the casing down approximately 1/2” (12 mm), push casing toward door so that it is flush with the door surface (approximately ½” or 12 mm), and lift the casing approximately ½” (12 mm).

For vehicle monitors: Open the upper RPM door

For train monitors: Open the control cabinet 

Using a flathead screwdriver, connect wires:

Red wire - Pin 8

Black wire - Pin 9

Move LD-260 switch to ON position. The LED PWR ON will illuminate.

DET-RPM-RAP-RM03, RPM Operational Testing

Record observations, times, and results for the maintenance report.

As specified by management or contractual obligations.