BENDIX BW1627 Manual De Usuario

LOWER

MOUNTING

BRACKET

AD-9

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/ AD-9

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 IPC

 

AIR DRYER

END COVER

FEMALE

CONNECTOR

MALE

CONNECTOR

LATCH MUST BE

INSERTED UNTIL

IT SNAPS OVER

TAB ON MATING

CONNECTOR

SIDE VIEW

END VIEW

  

1.  Check for moisture in the air brake system by opening 

reservoirs, drain cocks, or valves and checking for 
presence of water. If moisture is present, the desiccant 
may require replacement; however, the following 
conditions can also cause water accumulation and 
should be considered before replacing the desiccant:

A.  An outside air source has been used to charge the 

system. This air did not pass through the drying bed.

B.  Air usage is exceptionally high and not normal for 

a highway vehicle. This may be due to accessory 
air demands or some unusual air requirement that 
does not allow the compressor to load and unload 
(compressing and non-compressing cycle) in 
a normal fashion. Check for high air system 
leakage. If the vehicle vocation has changed it may 
be necessary to upgrade the compressor size. 
Refer to Appendix A, Table A and the column titled 
Vehicle Vocation.

C.  The air dryer has been installed in a system that 

has been previously used without an air dryer. This 
type of system will be saturated with moisture and 
several weeks of operation may be required to dry 
it out.

D.  Location of the air dryer is too close to the air 

compressor. Refer to the Locating  Bendix

 IPC Air Dryer On Vehicle section and 

Appendix A, Table A, column 2 for discharge line 
length; or

E.  In areas where more than a 30 degree range of 

temperature occurs in one day, small amounts 
of water can accumulate in the air brake system 
due to condensation. Under these conditions, the 
presence of small amounts of moisture is normal 
and should not be considered as an indication that 
the dryer is not performing properly.

 

Note: A small amount of oil in the system may be normal 
and should not, in itself, be considered a reason to 
replace the desiccant; oil stained desiccant can function 
adequately.

2.  Check mounting bolts for tightness. Re-torque to 

270–385 inch pounds.

3. Perform the Operation & Leakage Tests listed in this 

publication.

Oil removal requirements for air brake quality vary by 
vehicle manufacturer. Because vehicle vocation and 
maintenance can infl uence when the AD-9

®

 IPC air dryer 

cartridge requires replacement, each fl eet should modify 
their replacement schedule based on experience.  The 
change out interval will be extended if the compressor 
passes a low level of particles, and the interval will be 
reduced if excessive carbon particles are delivered to the 
dryer inlet.  Higher compressor build up times at idle and  

water or oil in downstream reservoirs indicate an AD-9

®

 

IPC air dryer desiccant cartridge may need to be replaced.

1.  Rebuild the air dryer including the desiccant cartridge.

Note: The desiccant change interval may vary from vehicle 
to vehicle. Although typical desiccant cartridge life is three 
years, many will perform adequately for a longer period of 
time. In order to take maximum advantage of desiccant life 
and assure that replacement occurs only when necessary, it 
is important that Operation & Leakage Tests be performed.