Specifications

CONFIDENTIAL
Bendix Commercial Vehicle Systems LLC
Elyria, OH 44036
PRODUCT SPECIFICATION - BW-283-PR
SPEC. BW-283-PR
73 SHEETS
SHEET NO. 69
8.2 Special Considerations
8.2.1 Spring Brake Control Valve (SR-5)
For trailers or dollies using spring brakes for the emergency brake function, a
spring brake control valve is required. The TABS6 Trailer ABS will generally
function with spring brake valves from other manufacturers, however the Bendix
SR-5 trailer spring brake control valve is recommended. See BW-196-PR for
details regarding the SR-5 trailer spring brake valve.
The SR-5 is designed to be tank mounted. Rotate the entire assembly into the
service tank port until secure and upright. A wrench may be used on the nipple
fitting to drive it into the tank port. Over-torquing of the nipple fitting could cause
damage to the valve body.
8.2.2 Non-Spring Brake Emergency Function
The DC-4 and TR-3 combination can be used to provide emergency brake
function when installed according to the figure below. Mount these valves
directly to the trailer frame rail or crossmember using the appropriate hardware.
Mounting holes may need to be drilled at the mounting location.
8.2.3 Choosing The Axle To Place Wheel Speed Sensors
If any axle is to be controlled by the TABS6 but not sensed, the wheel speed
sensors are typically located on the axle that tends to unload or lighten during
braking. The standard convention for sensor placement in this case is shown in
the following chart. However, due to variations in trailer suspension designs, this
convention is not correct for all applications. For more information on locating
the wheel speed sensors, contact Bendix or refer to the vehicle or suspension
manufacturer.
Choosing The Axle To Place Wheel Speed Sensors
Trailer
Suspension
Wheel Speed Sensor
Placement
2 Axle Spring Forward Axle
2 Axle Air Rear Axle
3 Axle Spring Forward and Rear Axles
3 Axle Air Center and Rear Axles
Figure 31: Wheel Speed Sensor Placement
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