BENDIX BW1450 manual AD-4AIR Dryer Troubleshooting Chart

Page 19

AD-4™AIR DRYER TROUBLESHOOTING CHART (Continued)

SYMPTOMS

CAUSE

REMEDY

 

H. Air by-passes desiccant

H. If vehicle uses Holset compressor, inspect

 

cartridge assembly.

feedback check valve for proper installation and

 

 

operation.

 

 

When replacing the desiccant cartridge, make

 

 

sure desiccant cartridge assembly is properly

 

 

installed and sealing rings are in place on

 

 

mounting surface of desiccant cartridge.

 

 

 

 

I. Desiccant requires

I. Replace desiccant cartridge assembly. Refer to

 

replacement.

Appendix A, Table A columns 3 & 4 for

 

 

recommended intervals.

 

 

 

3. Oil present at air dryer

A. Air brake charging

A. Air dryers remove water and oil from the air

purge exhaust or

system is functioning

brake charging system. A small amount of oil is

cartridge during

normally.

normal. Check that regular maintenance is

maintenance.

 

being performed and that the amount of oil in the

 

 

air tanks (reservoirs) is within the acceptable

 

 

range shown on the BASIC cup (see also

 

 

column 5 of Appendix A, Table A). Replace the

 

 

air dryer cartridge as needed and return the

 

 

vehicle to service.

 

 

 

4. Safety valve on air dryer

A. Restriction between air

A. Check to determine if air is reaching supply

“popping off” or

dryer and supply (first)

reservoir. Inspect for kinked tubing or hose.

exhausting air.

reservoir.

Check for undrilled or restricted hose or tubing

 

 

fittings and repair or replace as needed.

 

 

 

 

B. Air dryer safety valve

B. Verify relief pressure is at vehicle or component

 

malfunction.

manufacturer specifications. Replace if

 

 

malfunctioning.

 

 

 

 

C. Desiccant cartridge

C. Refer to Appendix A Table A and column 3.

 

maintenance required.

Check compressor for excessive oil passing

 

 

and/or correct compressor installation. Repair or

 

 

replace as necessary. Replace desiccant

 

 

cartridge.

 

 

 

 

D. Malfunctioning discharge

D. Test to determine if air is passing through check

 

check valve in end cover

valve. Repair or replace.

 

of the AD-4™air dryer.

 

 

E. Excessive pressure

E. Increase volume in discharge line by increasing

 

pulsations from

length or diameter. Add a ping tank (small

 

compressor. (Typical

reservoir).

 

single cylinder type).

 

 

 

 

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Contents Port l.D Function/Connection DescriptionCharge Cycle refer to Figure Operation of the AD-4AIR DryerPurge Cycle refer to Figure AD-4AIR Dryer Purge Cycle Preventive MaintenanceAD-4AIR Dryer Sectional View Every 10,800 hours or 300,000 miles or 36 months Operation & Leakage TestsRebuild the air dryer including the desiccant cartridge Rebuilding the AD-4AIR Dryer Maintenance Kits AvailableGeneral AD-4AIR Dryer Assembly AD-4AIR Dryer Removal DisassemblyAssembly Cleaning & InspectionThermostat Disassembly Refer to Figures Vehicle Application Requirements RE-INSTALLATIONTotal Vehicle Reservoir Volume Requirement Retrofitting the AD-4AIR DryerConnecting the AIR Lines All electrical connections must be waterproofed Testing the AD-4AIR DryerPresented AD-4AIR Dryer Troubleshooting ChartAD-4AIR Dryer Troubleshooting Chart Cycle. If pressure drops, check for kinks or With gauge installed at RES port of governorPressure should not drop below Cut-In pressure At the onset of the compressor UnloadedUnloaded for a minimum of 30 seconds. This Possible, check the air filter usage indicator Points where ice may form and block the flow. IfHow to help prevent discharge line freeze-ups, see Engine air filter and service if necessary ifAD-4AIR Dryer Troubleshooting Chart Preventative Maintenance Section AD-4AIR Dryer Troubleshooting Chart High Air Use Low Air UseHolset Type E & QE Compressor W/O Econ Valve Additional Troubleshooting InformationConventional Supply System & Integral Purge AIR Dryer Holset Type E & QE Compressor with Econ Valve

BW1450 specifications

The BENDIX BW1450 is a highly regarded air brake system that delivers exceptional performance and reliability in the heavy-duty truck and automotive sectors. The BW1450 is designed with advanced technologies and engineering breakthroughs that ensure enhanced safety and efficiency in braking operations.

One of the standout features of the BENDIX BW1450 is its robust and compact design. Constructed to withstand the rigors of heavy use, the system is both lightweight and durable, allowing for easy installation and maintenance. It incorporates a corrosion-resistant finish that helps protect against environmental factors, ensuring longevity and dependability.

The BW1450 leverages advanced modulation technology, which provides superior control during braking. This technology allows for gradual engagement and disengagement of the brakes, significantly reducing the risk of skidding or jackknifing during emergency stops. The system's sophistication extends to its ability to maintain consistent brake performance under various load conditions, making it a versatile choice for different vehicle types.

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In conclusion, the BENDIX BW1450 air brake system represents a combination of innovative design, cutting-edge technology, and reliable performance. Its lightweight construction, advanced modulation control, air disc braking capabilities, and integrated safety features make it an exemplary choice for the demanding requirements of heavy-duty vehicles.
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