Справочник Пользователя для BENDIX SD-08-2412

7.  Air dryer does not purge or 

exhaust air.

A.  Missing, broken, kinked, frozen, 

plugged or disconnected purge 
control line.

A.  Inspect control line from governor UNL (unloader) port to control 

port of air dryer. Test to determine if air fl ows through purge 
control line when compressor unloaded. Check for undrilled 
fi ttings. (See Symptom #4, Remedy C.)  

B.  Faulty air dryer purge valve.

B.  After determining air reaches purge valve (Remedy A above), 

repair purge valve.

C.  See Causes, B, E, G for Symptom 

#4.  

C.  Refer to Remedies B, E, G for Symptom #4. 

8.  Desiccant material being 

expelled from air dryer purge 
valve exhaust (may look like 
whitish liquid or paste or 
small beads.)

- OR - 

 

Unsatisfactory desiccant life.  

A.  This symptom is almost always 

accompanied by one or more of 
Symptoms 1, 2, 3, 4 and 5. See 
related causes for these symptoms 
above.

A.  See Causes and Remedies for Symptoms 1, 2, 3, 4 and 5.  

B.  Air dryer not securely mounted. 

(Excessive vibration.)  

B.  Vibration should be held to minimum. Add bracket supports or 

change air dryer mounting location if necessary.  

C.  Malfunctioning or saturated 

desiccant cartridge.

C.  Replace desiccant cartridge assembly. 

D.  Compressor passing excessive oil. D.  Check for proper compressor installation; if symptoms persist, 

replace compressor. 

E.  Desiccant cartridge not assembled 

properly to end cover. (Loose 
attachment)  

E.  Check the torque on the desiccant cartridge 

to end cover attachment. Refer to assembly section of this 
data sheet. 

9.  “Pinging” noise excessive 

during compressor loaded 
cycle.  

A.  Defective check valve assembly in 

air dryer end cover.

A.  Refer to Remedy C, Symptom #1.

B.  Leaking Turbo Cut-off valve.

B.  Repair or replace purge valve assembly.

C.  Leaking purge valve control piston 

o-ring. 

C.  Repair or replace purge valve assembly.

10. Constant seepage of air at 

air dryer purge valve exhaust 
(non-charging mode.)  

A.  Defective check valve assembly in 

air dryer end cover.

A.  Refer to Remedy C, Symptom #1. 

B.  Leaking Turbo Cut-off valve.

B.  Repair or replace purge valve assembly

C.  Leaking purge valve control piston 

o-ring.

C.  Repair or replace purge valve assembly.

11.  The air dryer purge piston 

c y c l e s   r a p i d l y   i n   t h e 
compressor unloaded (non-
compressing) mode.  

A.  Compressor fails to “unload”. 

A.  Faulty governor installation; no air line from governor to 

compressor or line is kinked or restricted. Install or repair air 
line.