Bendix Bw2763 Users Manual Air Dryer Troubleshooting

: Bendix Bendix-Bw2763-Users-Manual-651199 bendix-bw2763-users-manual-651199 bendix pdf

Open the PDF directly: View PDF .
Page Count: 1

Download
Open PDF In Browser	View PDF

Bendix® AD-SP® Air Dryer System
Field Inspection
1. Chock the vehicle wheels. Start the engine and charge the air brake system to
governor cut-out, around 130 psi.
2. The primary and secondary air gauges will start to rise. As the system pressure
reaches the cut-out pressure, the gauges will stop moving and the air dryer will
purge. When the air dryer purges, the secondary gauge will drop 8 to 14 psi.
3. Shut off the engine and push in the yellow button to release the parking brakes.
Note that the gauges will drop a small amount. Check the air gauges and
if either gauge indicates a continued loss of pressure, check the system for
leaks.
4. Apply and hold the service brakes by fully depressing the brake pedal. The
gauges will drop a small amount. Again, check for a loss of pressure by watching
both gauges. If either gauge indicates a continued loss of air pressure, check
the system for leaks.
5. Release the service brakes. Continue to apply and release the service brakes
until the pressure drops below governor cut-in (approximately 100 psi). Both
gauges will show a drop in pressure with each brake application. If the system
air pressure goes below 60 psi, the low pressure indicators will activate.

6. Start the engine and charge the air brake system again. Turn the engine off.
7. Locate and drain the primary reservoir. Both dash air gauges will indicate
a pressure drop. The secondary reservoir, which is not being drained, will
stop showing a drop in pressure above 90 psi. If both continue to drain, this
indicates that the secondary reservoir has a defective, or missing, pressure
protection valve such as the SC-PR™ single check protection valve.
8. Install or service the SC-PR™ single check protection valve in the air brake
system as shown in the schematic below.
9. Start the engine and charge the air brake system again. Turn the engine off.
10. Locate and drain the secondary reservoir. As this reservoir is drained, only the
secondary gauge should indicate a pressure drop. If both continue to drain, this
indicates that the primary reservoir has a defective, or missing, single or one
way check valve.
11. Replace the existing, or install a new, single check valve in the primary reservoir
supply port.

AD-SP® Air Dryer
Purge Cycle

WARNING: Be sure to follow all the General Safety
Guidelines outlined in the AD-SP® Service Data Sheet,
SD-08-2415, before performing any service on the air
brake system.

Primary
Reservoir

Control Port

Delivery
Port
Supply
Reservoir

Turbo Cutoff
Governor

Engine Turbo
Compressor

Exhaust
Port

SC-PR™
Single Check Protection Valve

Secondary
Reservoir

BW2763 © 2009 Bendix Commercial Vehicle Systems LLC, a member of the Knorr-Bremse Group • All Rights Reserved • 5/09 • Printed in U.S.A.



---

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.5
Linearized                      : Yes
Author                          : e006183
Create Date                     : 2009:05:13 13:15:10-04:00
Modify Date                     : 2009:05:13 13:15:10-04:00
XMP Toolkit                     : Adobe XMP Core 4.2.1-c041 52.342996, 2008/05/07-20:48:00
Creator Tool                    : PScript5.dll Version 5.2.2
Producer                        : Acrobat Distiller 9.0.0 (Windows)
Format                          : application/pdf
Title                           : BW2763 - Air Dryer Troubleshooting .indd
Creator                         : e006183
Document ID                     : uuid:59c31e9b-eb62-45a8-ad92-9135359dd687
Instance ID                     : uuid:79c4766c-b2d1-4c99-9c50-6de3f8a7fd0f
Page Count                      : 1

EXIF Metadata provided by EXIF.tools