Installation Manual

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303550 Installation Manual E-Series CMU Confidential
Revision Date: 14-Apr-2020 Revision: S
Process Owner: Engineering Page 16 of 36
B2. Screw-Mount Bracket
Required Tools/Materials
Tool Name
(Part No)
Description
T27 Tamper Resistant
Torx bit
Securing CMU case to
mounting plate
Female square drive
hex bit holder
Securing CMU case to
mounting plate
9.5mm [3/8”] Magnetic
Drive Socket
Starting self-drilling screws
4.5mm or [3/16”] Metal
Drill Bit
Drilling pilot holes (Optional),
should use a stop collar set to
9.5mm [3/8”] or less
Ratchet Head Torque
Wrench set to 5.5 N-m
[50 in-lb]
Securing screws
9.5mm [3/8”] Socket
Securing self-drilling screws
1. Choose a location (on B end of the railcar) for the CMU bracket that orients the CMU lid
toward the sky to promote good Global Navigation Satellite System performance. Ensure
mounting surface is free of imperfections that may prevent the bracket from mounting flush to
the surface.
2. If mounting on a tank car, measure the distance between the outer jacket and the inner tank.
Drill a 4.5mm [3/16”] test hole at one of the mounting screw locations. Use a stop collar set to
9.5mm [3/8”] on the drill bit. Use a small rod or probe to determine the distance between the
outer jacket and the inner tank. Do not proceed if distance is less than 28.5 mm [1 1/8”].
3. Fasten bracket to asset using 4 self-drilling screws provided shown in figure below. Torque
screws to 5.1-5.6 Nm [45-50 In-lbs].
4. Fasten CMU to bracket using 4 machine screws provided shown in figure below. Torque
screws to 5.1-5.6 Nm [45-50 In-lbs].
5. Upon completion of all optional WSN sensors and the CMU mounting, place a magnet on top
of the CMU at the magnet indentation for 20 seconds to force a cellular call from the CMU. The
magnet from the red label may be reused for this.