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Excessive Moisture in the Air System sb4269 PDF Download
This document provides instructions on how to prevent and correct excessive moisture in the air system. Excessive moisture can cause the air system to freeze up, which can lead to a loss of braking power. This document is intended for use by qualified automotive technicians.
Causes of Excessive Moisture in the Air System
There are several factors that can contribute to excessive moisture in the air system, including:
* **Condensation:** When warm, humid air comes into contact with a cold surface, it can condense into water. This can happen when the air system is not in use, such as when the vehicle is parked overnight.
* **Leaks:** Leaks in the air system can allow moisture to enter the system. This can happen anywhere in the system, from the compressor to the brakes.
* **Defective components:** Some components in the air system can fail and allow moisture to enter the system. This can include the compressor, the dryer, and the pressure regulator.
Symptoms of Excessive Moisture in the Air System
The following are some symptoms that may indicate excessive moisture in the air system:
* **Loss of braking power:** If the air system freezes up, you may experience a loss of braking power. This can be very dangerous, especially if you are driving in traffic.
* **Air leaks:** If you hear air leaking from the air system, it may be a sign that there is a leak in the system. This can allow moisture to enter the system.
* **Corrosion:** Excessive moisture in the air system can cause corrosion of the components in the system. This can lead to premature failure of the components.
Preventing Excessive Moisture in the Air System
There are several things you can do to prevent excessive moisture in the air system, including:
* **Keep the air system dry:** The best way to prevent excessive moisture in the air system is to keep the system dry. This means avoiding driving in wet or humid conditions as much as possible. If you do drive in wet or humid conditions, make sure to let the air system dry out thoroughly before you park the vehicle.
* **Fix leaks:** If you find any leaks in the air system, be sure to fix them as soon as possible. This will prevent moisture from entering the system.
* **Replace defective components:** If any components in the air system fail, be sure to replace them as soon as possible. This will prevent moisture from entering the system.
Correcting Excessive Moisture in the Air System
If you do experience excessive moisture in the air system, there are several things you can do to correct the problem, including:
* **Drain the air system:** The first step is to drain the air system of any excess moisture. This can be done by opening the drain valve on the air tank.
* **Dry out the air system:** Once the air system has been drained, you need to dry it out. This can be done by driving the vehicle in dry conditions with the air system turned on.
* **Add a moisture absorber:** If you live in a humid climate, you may want to add a moisture absorber to the air system. This will help to remove moisture from the air before it can condense.
By following these tips, you can help to prevent and correct excessive moisture in the air system. This will help to ensure that your vehicle's brakes are always working properly.
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Excessive Moisture in the Air System 42-69
Freightliner
Service Bulletin
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional
Century Class Conventional
Argosy COE
Cargo
Columbia
Coronado
Business Class M2
> Cascadia
108SD/114SD
