The height control valves are set at the factory to provide the proper distance between the axle and the frame in order to prevent "bottoming out" on bumps. This setting is maintained by the height control valves by putting air in the air springs with an additional load on board or by removing air from the air springs with the removal of the load from the coach.
Important: The setting of the height control valves should never be changed in an attempt to improve the ride quality. Other factors such as tire inflation pressure, shock absorbers, etc., will have more of an affect on the ride quality than the ride height does.
It may be necessary to adjust the ride height if either of the two following conditions exist:
| • | The rear of the vehicle appears to be too high or too low compared to the front of the vehicle. |
| • | The vehicle appears to lean to one side or the other. |
If the coach is leaning, determine whether it is necessary to lower the high side or to raise the low side in order to achieve a level ride. For the proper measurement points and ride height specifications, refer to Ride Height .
