BENDIX TCH-013-018 ユーザーズマニュアル

When installing valve components on a vehicle, including service replacement parts, the installer needs to carefully 
follow the installation guidelines.  Not following these guidelines can lead to damage of the valve and reduced 
vehicle braking. Bendix Commercial Vehicle Systems LLC has identifi ed that some Bendix

®

 AT-3

™

 solenoid 

valve bodies have become damaged and may result in leakage.  Bendix recommends that the crimp area 
of the AT-3

™ 

valve be inspected and replace the valve if this area has been found to have become loose.  

See Figure 1.

The Bendix

®

 AT-3

™

 solenoid valve is a specialized air brake valve which may be used for several functions, 

depending on the specifi c vehicle needs. Most typically, the AT-3

™

 solenoid valve is used in the Bendix

®  

ATC 

automatic traction control and Bendix

® 

ESP

®

 stability systems.  See Figure 2 for typical applications of the Bendix 

AT-3

™

 solenoid valve.  One or two of these valves may be installed on a vehicle.  

To identify if the AT-3

™

 solenoid valve on your vehicle is damaged, perform the following inspection.  Follow all 

standard industry safety precautions, including, but not limited to, those included in this document.

1.  Park the vehicle on a level surface and block the wheels and/or hold the vehicle by means other than the air 

brakes.

2.  Drain the air pressure from all vehicle reservoirs.  

3. Locate the AT-3

™

 solenoid valve(s) on the vehicle. See Figure 2.

4.  With the valve mounted on the vehicle, grasp the solenoid body with your hand and attempt to rock it, checking 

for looseness of the crimp area.  If the solenoid body moves, or rocks, then the valve is damaged and should 
be replaced.  Replacement valves are available through any Bendix authorized parts distribution center.  If a 
replacement valve is needed, be sure to follow the installation guidelines included with the valve to prevent 
damage to the replacement valve.

FIGURE 1 - THE BENDIX

Electrical 

Connector

Solenoid Body

Valve Body

Permitted 

Clamp 

Location

Clamp From 

Both Sides of  

Mounting Hole 

Flange

Permitted 

Clamp 

Location

Never Clamp 

Using Solenoid 

Body

Crimp Area 

Supply Port

Mounting Holes

Service /

Exhaust 

Port

 Delivery 

Port