BENDIX TCH-006-005 Fascicule

Changeover Kit

Effective immediately, the Bendix

 DS-1

™

 and DS-2

™

 double check valve and stoplight switches are obsolete and 

can no longer be ordered from Bendix.  To service these valves, two separate valves — a double check valve and a 
separate stoplight switch — can be installed together to achieve the same functionality.  To facilitate the changeover, 
Bendix is providing changeover kits which include the valves and necessary couplings.  The changeover tables 
below — and on the following page — identifi es the changeover kit piece numbers.

Note  that  the  functionality  of  the  two  valves  mounted  together  is  the  same,  however  the  overall  size  of  the  two 
components mounted together is not.  Be sure to review the dimensions of the assembly and verify the installation 
before attempting the valve replacement.

Valve and Stoplight Switch 

© 2014 Bendix Commercial Vehicle Systems LLC, a member of the Knorr-Bremse Group • 2/2014 •  All Rights Reserved.  

1/4” NPT 

(Female) for 

Pc. No. 229493 only

228050, 228050N

K108140

1/2”

228165N

K108141

3/8”

228520, 228520N

K108140

1/2”

Coupling must be used to facilitate the installation 

229493

K108140

1/2”

The Bendix

®

 DS-1

™

 double check valve and stoplight switch 

contains port D — a 1/4” female pipe thread. This port is not 
included on the Bendix

®

 DC-4

®

 check valve replacement.  An 

additional coupling may be needed to facilitate this changeover.

1/4” NPT

1/4” NPT

1/4” NPT

A 

1/4” NPT

Terminal 

8-32 Thread 

Terminal 

8-32 Thread 

2.85”

3.06”

4.12”

3.00”

1/4 NPT 

(Coupling to be installed in 

this port when replacing

 Pc. Nos. 228520 and 

228520N)

Install in 

DC-4 valve

4.12”

3.65

D 

(Female)