Bendix® AD-RPAIR DRYER TROUBLESHOOTING CHART

SYMPTOMS

CAUSE

REMEDY

7. Unable to build air

A. Bendix® AD-RPair dryer

A. Check that the purge control of the AD-RP air

system pressure.

purge control line incorrectly

dryer is connected to the UNL (unloader) port on

 

connected to governor.

governor.

 

 

 

 

B. Air trapped in the purge

B. Inspect for kinked, plugged, damaged hose tubing

 

control line (between the

or fi ttings. Check for undrilled fi ttings or restricted

 

governor and the AD-RP air

hose or tubing fittings. Repair or replace as

 

dryer.)

necessary.

 

 

 

 

 

 

C. Governor malfunction.

C. Test the governor operation. Repair or replace as

 

 

necessary.

 

 

 

 

D. Compressor unloader

D. Test the compressor unloader mechanism for

 

mechanism malfunction.

proper operation. Repair or replace as necessary.

 

 

 

 

E. The AD-RP air dryer purge

E. Check the operation of the AD-RP air dryer heater

 

valve piston is frozen open.

and thermostat. Repair or replace as necessary.

 

 

 

 

F. The AD-RP air dryer purge

F. Check the operation and repair or replace as

 

valve piston is stuck.

necessary.

 

 

 

8. Air dryer does not

A. Air is not reaching the

A. Test to determine that air fl ows through the purge

purge or exhaust air.

AD-RP air dryer purge

control line to the purge control port on the AD-RP

Note: this symptom

control port.

air dryer when the compressor is unloaded. Check

often precedes

 

for undrilled fi ttings. Check if the purge control line

Symptom #9 if

 

is broken, not connected, mis-connected, frozen or

desiccant cartridge is

 

damaged. Inspect, repair or replace as necessary.

not replaced.

 

Replace desiccant cartridge.

 

 

 

 

B. The AD-RP air dryer purge

B. Check the operation of the AD-RP air dryer heater

 

valve or piston is frozen

and thermostat. Repair or replace as necessary.

 

closed.

Replace desiccant cartridge.

 

 

 

 

C. Extremely high air usage

C. Refer to the Vehicle Application Requirements

 

requirements on the

section of this manual and verify application.

 

vehicle.

 

 

 

 

(continued)

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BENDIX SD-08-2415A manual Bendix AD-RPAIR Dryer Troubleshooting Chart

SD-08-2415A specifications

The BENDIX SD-08-2415A is a state-of-the-art electronic control module designed to enhance the performance and safety of commercial vehicle brake systems. This innovative device is part of BENDIX's commitment to providing advanced braking technologies that meet the demands of modern transportation.

One of the main features of the SD-08-2415A is its integrated functionality, which combines multiple braking systems into a single module. This includes Anti-Lock Braking Systems (ABS), Traction Control Systems (TCS), and Electronic Stability Control (ESC). By integrating these systems, the SD-08-2415A provides improved vehicle control and ensures optimal braking performance in various driving conditions.

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