BENDIX SD-08-2417 Manuale Utente

ASSEMBLY
1.  Lubricate the smaller o-ring and check valve body with  

a heavy-duty lithium grease.

2.  Install this o-ring on the check valve body by sliding the 

o-ring over the set of four tapered guide lands.  The  

o-ring groove holds the o-ring in its correct location.  

3.  At the other end of the check valve body, the spring is 

installed over the set of four straight guide lands.  When 

the spring has been pushed to the correct location, the 

check valve body is designed to hold the end of the 

spring in position: be sure that the spring is not loose 

before continuing with this installation.

4.  Install the assembled check valve body/o-ring/spring 

in the delivery port so that the o-ring rests on its seat 

and the free end of the spring is visible.

5.  Grease the adapter and the remaining larger o-ring and 

install it onto the fitting.  

6.  Position the governor gasket, then insert the governor 

mounting bolts through the governor and tighten (to 

125  in-lbs).    Note:  Do not replace with a standard 

7.  Re-attach the air line to the governor.
8.  Before  placing  the  vehicle  back  into  service,  check 

to see that the system pressure now builds to full 

operational pressure.

Before placing the vehicle in service, perform the following 

tests:
1.  Close all reservoir drain valves.
2.  Build up system pressure to governor cut-out and note 

that one of the AD-IS

®

 EverFlow

®

 Assembly air dryers 

purges with an audible burst of air, followed immediately 

by approximately 30 seconds of air flowing out of the 

purge valve.

3.  Apply and release the service brakes several times to 

reduce system air pressure to governor cut-in.  Note 

that the system once again builds to full pressure and 

is followed by a purge at the other AD-IS EverFlow 

assembly air dryer exhaust.

4.  It is recommended that the total air system be tested for 

leakage to ensure that the AD-IS EverFlow assembly 

air dryers will not cycle excessively.

See Bendix publication BW5057 “Air Brake Handbook.”

Consult the Bendix

®

AD-IS

®

 air dryer service data sheet, 

SD-08-2418, for air dryer maintenance and service 

information.

1.  Excessive dryer purging in the loaded cycle.

•  The purge valves in both dryers must have soft-seat 

turbo cut-off valves. See Figure 7.  Remove the purge 

valve an examine the upper window, replace with soft 

seat purge valve.  

METAL

BLACK 

RUBBER

HARD SEAT 

SOFT SEAT