MCI SERVICE INFORMATION
Headlamp Alignment - MC1 through D4500
Headlamp alignment is something that needs attention on a periodic basis, especially after any incident of front-end damage. Too often, though, it is neglected. Below are the steps for checking alignment. This procedure is performed without the use of special alignment equipment. It is not an appropriate procedure for the headlamp alignment on the "E" or "J" models. These coaches are equipped with projector style headlamps and require a separate procedure, which will be discussed in a future service tip.
- Place the vehicle on a level floor so headlamps are 25 feet (7.6 m) from a smooth vertical surface preferably of light color. A door or wall is suitable. Position the coach so it is square to this wall / door. In other words, all the headlamps must be 25 feet from the wall. See Figure 1.
- Check the tire pressure on all the wheels and correct as required.
- Verify that the coach suspension is at the correct ride height. The measurement is located in Section 12 of your model's maintenance manual. (NOTE: while checking headlamp alignment, do not allow anyone in or out of the coach.)
- Measure the height of the headlamps above the floor, measuring to the center of the lamps. Draw a horizontal line on the wall the same distance above the floor as this headlamp measurement.
- Mark a spot on this horizontal line that lines up with the centerline of the coach.
- Measure the distance from the center of the LH Low Beam to the RH Low Beam. Draw a vertical line 1/2 this distance on each side of your center mark. The intersection points of the horizontal line to these two vertical lines represent the center points of your Low Beam lamps. See Figure 1.
- Measure the distance between the center of the LH Low Beam to the center of the LH High Beam. On the wall create a third vertical line to represent the LH High Beam. Repeat for the opposite side.
- Switch on the High Beams and cover the right front lamps while adjusting the other side. Also cover the outboard lamp, since it will be adjusted using low beams. CAUTION: The headlamps get warm when switched on. Be sure to use a covering material that is not flammable.
- The center of the high-intensity zone of the High Beam should be located at the horizontal and vertical line intersection for the LH High Beam. See Figure 2.
- When aiming headlamps, if the lighting pattern is distorted when compared to a new lamp, it must be replaced.
- After the LH headlamp is properly aligned, cover it and proceed in the same manner as above with the RH headlamp.
- Low beams are adjusted in a similar manner. Switch on low beams and cover the right front lamps while adjusting the other side.
- The low beam headlamps are aimed so that the top edge (the cutoff) of the high-intensity zone is at the horizontal line and the left edge of the high-intensity zone is at the vertical centerline of the headlamp. See Figure 3.
- After LH headlamp is properly aligned, cover it and proceed in the same manner as above with the RH headlamp.
If you have any questions, please call the MCI Customer Support Center at (800) 241-2947.
Motor Coach Industries - A New Flyer company: Corporate Address 200 East Oakton Street, Des Plaines, Illinois 60018 | Phone: 866-MCICOACH
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