User's Manual

Orienting the SDM on the Mount Satellite Data Modem (SDM) Installation

5-2 1/9/06 80-J4866-1 Rev. A

ALL INFORMATION SUBJECT TO CHANGE

RAF

DO NOT

Installing the SDM involves three basic steps:

• Orienting the SDM on the mount

• Installing the mounting bolts

• Connecting the cables

Orienting the SDM on the Mount

Install the SDM so that it is level when the vehicle is level.

Vehicles with Airdams

1. Under a full airdam, orient the SDM so that the SDM cable exits toward the front of the

vehicle.

Note

This orientation under an airdam reduces the likelihood of water entering the SDM through

the connector port, especially when the vehicle is cleaned with high-pressure water.

Vehicles Without Airdams

1. On a vehicle without an airdam, orient the SDM so that the SDM cable connection faces

toward the rear of the vehicle.

Note

This orientation on vehicles without an airdam prevents wind-driven rain from pounding the

connectors.

2. Install the SDM so that it does not exceed the Federal D.O.T. mandated maximum legal

height of 13 feet 6 inches.

Installing Mounting Bolts

1. Mount the SDM to the mounting bracket using the bolts and washers supplied with the

SDM mounting hardware (or exact substitutions). Normally, bolts longer than

3/4" should

not be used. However, if longer bolts are needed, such as when the SDM is being

attached to a fiberglass shelf with a plywood base, use

1/4-20 UNC grade 8 or better.

2. Tighten the SDM mounting bolts to the recommended torque of 60 inch/pounds (not

foot/pounds).

Caution

To avoid over-torquing, never use power tools to tighten mounting hardware.