98-B-1
CATALOG
BW1949 © 2002 Bendix Commercial Vehicle Systems LLC 3/2002 Printed in U.S.A. All rights reserved.
SBI-1
In normal stopping situations, the driver activates the yellow
caution lights when approaching a stop (where required),
applies the service brake to bring the bus to a complete stop,
pulls the parking brake to park the bus, and finally, opens the
door to activate the flashing red lights and extend the stop
sign. This final step activates the AutoBrake system, eliminat-
ing the need for the driver to activate the parking brake.
The Bendix AutoBrake uses a pneumatic solenoid, powered
by the vehicle's stop arm solenoid circuit. When used prop-
erly in compliance with state regulations, AutoBrake's nomi-
nal 44 psi rear axle service brake application prevents the bus
from rolling, without having to use the parking brake. When
the driver closes the door to continue on the route, AutoBrake
is automatically released.
AutoBrake is a supplemental brake system, and is not in-
tended as a parking brake. That means the driver still needs
to keep their foot on the brake pedal. If the driver removes his
or her foot during the AutoBrake application, a warning buzzer
and amber dash lamp will activate. The buzzer and lamp will
deactivate when brake pressure is reapplied or the parking
brake is engaged.
AUTOBRAKE
TM
MODULE
See Page 98-B-2 for retrofit kit component list
The AutoBrake Module is included in retrofit kit piece
number 5008285 and 5011053 only and is not available
as a service replacement. For servicing refer to the
components shown below.
PACKARD
CONNECTOR
BREATHER
3/8" P.T.
19
1/4" P.T.C.
3/8" P.T.C.
22
20
21
23
MOUNTING
CLAMPS
(BACK SIDE)
THE FOLLOWING COMPONENTS ARE AVAILABLE FOR
SERVICING OF THE AUTOBRAKE MODULE:
ITEM DESCRIPTION QTY. SERVICE
PC. NO.
19 Double Check Valve 1 278614
20 Synchronizing Valve 1 5005365
21 Solenoid Air Valve 1 5008274
22 Pressure Reducing Valve 1 107154
23 Mounting Clamps 3 5008290
AutoBrake kits are available for both sequential and non-se-
quential systems. Follow the test procedure shown here to
identify the appropriate kit for your vehicle.
Device Code 9803
98-B-2
CATALOG
BW1949 © 2002 Bendix Commercial Vehicle Systems LLC 3/2002 Printed in U.S.A. All rights reserved.
SBI-1
AUTOBRAKE RETROFIT KIT
Test procedure to determine if your bus has a sequential or non-sequential lighting system
Verify there is power to the flasher unit indicating the system is on. Open the bus door without
turning on the amber lamps. If the stop arm extends and red lights flash, the bus has a non-
sequential lighting system and the correct Bendix AutoBrake kit to order is part number 5011053.
If the stop arm does not extend and the red lights do not flash, the bus has a sequential lighting
system and the correct Bendix AutoBrake kit to order is part number 5008285.
1
13
15
16
17
8
10
9
5
11
6
4
14
12
7
2
3
18
(INCLUDED IN NON-
SEQUENTIAL KIT 5011053
ONLY)
THE AUTOBRAKE RETROFIT KIT PC. NO. 5008285 & 5011053
CONSISTS OF THE FOLLOWING COMPONENTS:
ITEM DESCRIPTION QTY. SERVICE
PC. NO.
1 Module 1
2 Wiring Harness 1 5008055
3 3/8 Tube Sleeve 1
4 5/8 Tube Sleeve 1
5 Pipe Tee 1
6 3/8" Brass Insert 1
7 5/8" Brass Insert 1
8 Cable Tie 12
9 1/4" 90° Male Elbow 2
10 5/8" 90° Male Elbow 2
11 Male Connector 1
12 Pressure Switch (6-10 PSI) 1 5008275
13 Low Pressure Switch (15-25 PSI) PTC 1 5008276
14 Park Brake Pressure Switch 1 5008289
15 Warning Label 1
16 3/8 Nylon Tubing x 8 1
17 5/8 Nylon Tubing x 8 1
18* Wiring Harness 1
*for Kit 5011053 only
98-B-3
CATALOG
BW1949 © 2002 Bendix Commercial Vehicle Systems LLC 3/2002 Printed in U.S.A. All rights reserved.
AUTOBRAKE
MODULE
PRESSURE REDUCING
VALVE (22)
SYNCHRONIZING
VALVE (20)
SOLENOID AIR
VALVE (21)
DOUBLE CHECK VALVE
(19)
LOW PRESSURE
SWITCH (13)
AutoBrake sequential kit part number 5008285 installed on a vehicle with antilock.
SPRING
BRAKE
RELAY VALVE
ECU
MODULATOR
BRAKE
VALVE
12
14
SPRING
BRAKE VALVE
13
22
19
21
20
AUTOBRAKE SCHEMATIC
SEQUENTIAL WITH ABS
SBI-1
98-B-4
CATALOG
BW1949 © 2002 Bendix Commercial Vehicle Systems LLC 3/2002 Printed in U.S.A. All rights reserved.
SPRING
BRAKE
AUTOBRAKE
MODULE
RELAY VALVE
ECU
MODULATOR
BRAKE
VALVE
PRESSURE REDUCING VALVE
(22)
SYNCHRONIZING
VALVE (20)
SOLENOID AIR VALVE
(21)
DOUBLE CHECK VALVE (19)
12
14
LOW PRESSURE
SWITCH(13)
13
>
>
SPRING
BRAKE VALVE
AUTOBRAKE SCHEMATIC
NON-SEQUENTIAL WITH ABS
SBI-1
AutoBrake non-sequential kit part number 5011053 installed on a vehicle with antilock.
22
21
20
19
/