Introduction

Section 1: One-Page Introduction
Air Supply The vehicles compressor takes in filtered air, either at atmospheric pressure from the outside (or already at an increased pressure, from the engine turbocharger in some cases), and compresses it. The compressed air is delivered to the air dryer where water and a small amount of oil is removed. The air then travels into the air reservoirs (air tanks) - typically delivered to a rear brake system reservoir and a front brake system reservoir as well as any attached trailer reservoirs. For each system, the air pressurizes the reservoir and the air hoses all the way to the next control valve, where the air pressure remains, ready to be used. A vehicle may use compressed air for many tasks. Some examples are: to provide force for braking, to deliver air to a particular component, to off-load bulk goods, etc. Normal Braking When the driver applies the foot brake, a plunger within the foot brake valve moves, opening channels within the valve that allow the air pressure waiting there to pass through and be delivered to the rear and front brake systems. The pressure quickly increases in the brake chambers and applies force to the push rod, transferring the force to the S-Cam or air disc brake. (See page 22 for more about foundation brakes.) Frictional forces slow the wheels and the vehicle comes to a stop. When the brakes are released, the air in the brake chambers is able to be quickly released and enable the driver to drive away. Vehicle Parking Vehicles are parked using powerful springs which are part of the spring brake assembly, to engage the brakes and hold the vehicle in position. When the driver prepares to move away and releases the parking brake, the spring force is countered by the introduction of air pressure. Anti-compounding valve features in the system design help prevent the application of both the spring and service brakes together. Antilock Braking Systems (ABS) Most commercial vehicles use electronic Antilock Braking System (ABS) to help improve braking when excessive wheel slip, or wheel lock-up, is detected. Bendix Electronic Control Units (ECUs) use patented technology to monitor wheel speeds (on all wheels equipped with speed sensors) and use ABS modulator valves to adjust or pulse the braking force being applied and released, many times per second, during an ABS event. ABS typically improves stability and steerability, and also reduces stopping distances on most surfaces.

In addition to the ABS features above, some recent model ECUs have a drag torque control feature which reduces driven-axle wheel slip (due to driveline inertia) by communicating with the engines controller and increasing the engine torque. Antilock Traction Control In addition to the ABS function, some Bendix ECU models provide an Automatic Traction Control (ATC) feature which can help improve vehicle stability and traction during vehicle acceleration (at low speeds), and lateral stability while driving through curves. Electronic Stability Program (ESP*) Recent Bendix ABS advances include ESP which has the ability to apply brakes to individual wheel ends, and the trailer, to counteract the trailer push during maneuvers that may lead to loss of control or jackknifes on low to high friction surfaces (snow, rain, asphalt, concrete, etc.) Roll Stability Program (RSP) The Bendix Roll Stability Program (RSP), is an all-axle ABS solution that helps reduce vehicle speed by applying all vehicle brakes as needed, reducing the tendency to roll over. RSP focuses on reducing the vehicles speed below the critical roll threshold during directionchanging maneuvers such as exit ramps and obstacle avoidance on dry, high friction surfaces. Emergency Braking In emergency situations where system air pressure is reduced or lost, government regulations require vehicles to meet specified stopping distances. As an example, some straight truck system designs use modulated parking-brake applications to bring the vehicle to a stop. Vision Systems Bendix offers video camera systems that help drivers back vehicles up safely, assist drivers with viewing what is in their blind spots around their vehicles, as well as infrared XVision night vision camera systems that provide drivers advanced warning of obstacles in their pathway at night by seeing 3 to 5 times further than their standard headlights. All of our camera systems can be purchased individually to meet drivers specific needs or can be purchased as a total system to provide a complete 360 degree 24/7 video camera system for drivers.
*ESP is a registered trademark of Daimler Chrysler.

Overview

Section 2: The Charging System
The charging system consists of: An air compressor A governor, to control when the compressor needs to build, or stop building, air for the system and also to control the air dryer purge cycle An air dryer, to remove water and oil droplets from the air Reservoirs (or air tanks) to store air to be used for vehicle braking, etc. Safety valves to protect against excessive pressure in the system in the event that a charging system component malfunction occurs, e.g. a line blockage Single check valves to maintain a one-way flow of air into the reservoirs. This arrangement protects the contents from being drained in the event of an upstream loss of pressure Low pressure indicators to alert the driver whenever a reservoir has less than a pre-set amount of air available
Low Pressure Indicator Check Valve Safety Valve Air Dryer Check Valve Purge Valve

Secondary Reservoir

Governor Air Compressor

Safety Valve

Primary Reservoir
Note: Although a typical three-reservoir system is shown here, some system designs do not use a Supply reservoir.

Drain Valve

Supply Reservoir

Bendix Air Compressors

The air compressor is the source of energy for the air brake system. Usually driven by the vehicle engine, the air compressor builds the air pressure for the air brake system. The air compressor is typically cooled by the engine coolant system and lubricated by the engine oil supply. (Certain models have self-lubricated and/or air-cooled versions available.) Note: Air compressor shafts can rotate in either direction. The vehicles compressor draws in filtered air, either at atmospheric pressure from the outside (or already at an increased pressure, from the engine turbocharger where permitted), and compresses it. The brake system needs a supply of compressed air between a preset maximum and minimum. The governor (along with a synchro valve for the Bendix DuraFlo 596 air compressor) monitors the air pressure in the supply reservoir and controls when the compressor needs to pump air into the air system (also known as the air build cycle - the compressor is running loaded) and when the compressor should simply turn over without building pressure (running unloaded). When the air pressure becomes greater than that of the preset cut-out, the governor controls the unloader mechanism of the compressor to stop the compressor from building air and also causes the air dryer to purge. As the service reservoir air pressure

Compressors

drops to the cut-in setting of the governor, the governor returns the compressor back to building air and the air dryer to air drying mode. As the atmospheric air is compressed, all the water vapor originally in the air is carried along into the air system, as well as a small amount of the compressor lubricating oil as vapor. The duty cycle is the ratio of time the compressor spends building air to the total engine running time. Air compressors are designed to build air (run loaded) up to 25% of the time. Higher duty cycles cause conditions (such as higher compressor head temperatures) that affect air brake charging system performance. These conditions may require additional maintenance and lead to a higher amount of oil vapor droplets being passed along into the air brake system. Factors that add to the duty cycle are: air suspension, additional air accessories, use of an undersized compressor, frequent stops, excessive leakage from fittings, connections, lines, chambers or valves, etc. See page 9 for compressor maintenance and usage guidelines. Use the BASIC test (p/n 5013711) where the amount of oil present in the air brake system is suspected to be above normal. The discharge line allows the air, water-vapor and oilvapor mixture to cool between the compressor and air dryer. The typical size of a vehicle's discharge line, (see table on page 9) assumes a compressor with a normal (less than 25%) duty cycle, operating in a temperate climate. See Bendix and/or vehicle or air dryer manufacturer guidelines as needed. When the temperature of the compressed air that enters the air dryer is within the normal range, the air dryer can remove most of the charging system oil. If the temperature of the compressed air is above the normal range, oil as oil-vapor is able to pass through the air dryer and into the air system. Air dryer inlet temperatures play a key role in air system cleanliness and air dryer performance. Larger diameter discharge lines and/or longer discharge line lengths can help reduce the temperature. The discharge line must maintain a constant slope down from the compressor to the air dryer inlet fitting to avoid low points where ice may form and block the
Discharge Line Safety Valve

Optional Bendix PuraGuard QC Oil Coalescing Filter Air Dryer

Purge Valve

Supply Reservoir Drain Valve
flow. If, instead, ice blockages occur at the air dryer inlet, insulation may be added here, or if the inlet fitting is a typical 90 degree fitting, it may be changed to a straight or 45 degree fitting. For more information on how to help prevent discharge line freeze-ups, see Bendix Bulletins TCH-08-21 and TCH-08-22. Shorter discharge line lengths or insulation may be required in cold climates. The air dryer contains a filter that collects oil droplets, and a desiccant bed that removes almost all of the remaining water vapor. The compressed air is then passed to the air brake service (supply) reservoir. The oil droplets and the water collected are automatically purged at the dryer when the governor reaches its cutout setting. For vehicles with accessories that are sensitive to small amounts of oil, we recommend installation, downstream of the air dryer, of a Bendix PuraGuard QC oil coalescing filter to minimize the amount of oil present. See the Bendix Advanced Compressor Troubleshooting Guide (BW1971) or the compressors Service Data sheet, available online at www.bendix.com for more information.
Single-Cylinder Compressors Two-Cylinder Compressors
BX-2150 air compressor Tu-Flo 500 air compressor
Tu-Flo 400 air compressor
Tu-Flo 700 air compressor
Tu-Flo 501 air compressor
BA-921 air compressor Tu-Flo 550 air compressor or Tu-Flo 750 air compressor (exterior view is the same)
DuraFlo 596 air compressor or BA-922 air compressor (exterior view is very similar)
Compressor Comparison by Displacement
Tu-Flo 400 Compressor BX-2150 Compressor Tu-Flo 500 Compressor Tu-Flo 501 Compressor Tu-Flo 550 Compressor Tu-Flo 700 Compressor BA-921 Compressor Tu-Flo 750 Compressor Tu-Flo 1000 Compressor* DuraFlo 596 Compressor BA-922 Compressor Tu-Flo 1400 Compressor*
nd lu En ers br g i Tu icat ne/ rb ed se lf o in ava le il.? t co Wa opt ol te ion ed r/ ? av airail.?
D isp @ lace 12 m 50 en 0 t C RP CF yli M M
Four-Cylinder Compressors
7.25 9.12 13.2 15.5 15.8 16.27 31.6 32
Eng. Y** Water Eng. Both Eng. Eng. Y Water Y Both
*Special use. e.g. Tank trailer pump-off **Uses Inlet Check Valve ***Uses Inlet Regulating Valve
Tu-Flo 1000 air compressor

Y Water Y Water

Tu-Flo 1400 air compressor
Eng. Y** Water Eng. Both Eng. Eng. Eng. Y Water Y Both
N Water N Water Y*** Water
For compressor Service Data Sheet directory see pages 63-64.

Compressor Maintenance Guidelines
Maintenance Schedule and Usage Guidelines
Regularly scheduled maintenance is the single most important factor in maintaining the air brake charging system. The table below is an introduction to the maintenance intervals for air brake charging systems. See your compressor and/or air dryer Service Data sheet for more information. If you are concerned that a compressor may be passing oil, use the BASIC Test Kit: Order Bendix P/N 5013711.
2 Discharge Line Length 4 Air Dryer

Maintenance Schedule

1 Air Compressor Specd

Reservoir Draining

High Air Use
e.g. Double/triple trailer, open highway coach/RV, (most) pick-up & delivery, yard or terminal jockey, off-highway, construction, loggers, concrete mixer, dump truck, fire truck.
Compressor with up to 25% duty cycle
e.g. City transit bus, refuse, bulk unloaders, low boys, urban region coach, central tire inflation.

Low Air Use Low Air Use

e.g. Line haul single trailer without air suspension, air over hydraulic brakes. e.g. Line haul single trailer with air suspension, schoolbus.
Compressor with up to 25% duty cycle Compressor with up to 25% duty cycle (builds air pressure up to 25% of the engine running time.)
Compressor with less than 15% duty cycle (builds air pressure 15% or less of the engine running time.)

(5 or less axles)

(8 or less axles)

(12 or less axles)

1 Examples of Typical Compressors Specd
Bendix Tu-Flo 750 air compressor
Bendix BA-921 air compressor Bendix Tu-Flo 550 air compressor Bendix BA-922 air compressor DuraFlo 596 air compressor

Discharge line: 6 ft. @

2 in. I.D. (oil carry-over
control suggested upgradeb: 9ft. @ 5/8 in.)
Discharge line: 9 ft. @ in. I.D. (oil carry-over control suggested upgradeb: 12ft. @ 5/8 in.)
Discharge line: 12 ft. @ in. I.D. (oil carryover control suggested upgradeb: 15ft. @ 5/8 in.)
Discharge line: 15 ft. @ 5/8 in. I.D. (oil carryover control suggested upgradeb: 15ft. @ in.)
Drain Reservoirs Every Month - 90 Days Replace Air Dryer Cartridge Every 3 Yearsc Use the BASIC Test Kit: Order Bendix P/N 5013711 BASIC test acceptable range: 3 oil units per month.

Drain Reservoirs Every Month Replace Every 2 Yearsc Replace Every Yearc

Oil Passing Concerns?

Use the BASIC Test Kit: Order Bendix P/N 5013711 BASIC test acceptable range: 5 oil units per month.
sufficient cooling occurs, the oil-vapor condenses and can be removed by the air dryer. Discharge line upgrades are not covered under warranty. Note: To help prevent discharge line freeze-ups, shorter discharge line lengths or insulation may be required in cold climates. See Bendix Bulletins TCH-08-21 and TCH-08-22, for more information. c. With increased air demand the air dr yer cartridge needs to be replaced more often.
a. Note: Compressor and/or air dryer upgrades are recommended in cases where duty cycle is greater than the normal range (for the examples above). For certain vehicles/applications, where turbo-charged inlet air is used, a smaller size compressor may be permissible. b. To counter above normal temperatures at the air dryer inlet, (and resultant oil-vapor passing upstream in the air system) replace the discharge line with one of a larger diameter and/or longer length. This helps reduce the air's temperature. If

Governors and Components

The Governor monitors the air pressure in the supply reservoir and operates the compressor unloading mechanism to control whether the compressor builds air pressure or not. The Bendix D-2 governor is an adjustable pistontype valve available preset to a choice of pressure settings. The pressure range between the cut-in and cut-out pressure is designed into the governor and is not adjustable. The D-2 governor may be direct-mounted to the compressor or remote-mounted as desired. Specialized governors are available for vehicles needing a governor adapted to abnormally high or low temperatures, as well as a weatherproof model. The D-2A governor is a non-adjustable version of the D-2 governor. The D-2/SV-1 governor module is a special combination device used with the Bendix DuraFlo 596 air compressor to provide the fast-rising unloader signal needed by this compressor. Safety Valves are used in an air brake system to protect against excessive air pressure buildup and to sound an audible alert. Safety valves are available in both adjustable (e.g. the Bendix ST-1 valve) and nonadjustable (e.g. ST-3, ST-4 valve) styles, in various pressure settings, and for various port sizes. Maximum service system air pressure allowed by government regulation is typically 150 psi. Various safety valve settings are used at different points in the charging and treatment system. Specifically designed for use in compressors, ST-4 safety valves are installed in an extra compressor head discharge port, if available, or in the discharge line near the compressor, to prevent compressor damage in the event of discharge line blockage. An Inlet Regulating Valve (or IRV) is typically used on multi-cylinder compressors which receive their input air supply from the pressurized side of the engine turbocharger. The IRV, which is generally mounted to the compressor inlet, is designed to regulate compressor inlet pressure to 10 PSI or less. The outlet flange of the IRV can be mounted to all Bendix Tu-Flo compressors except the Bendix Tu-Flo 300 compressor. The IRV may not be used in conjunction with single cylinder compressors.

Governors

Exhaust Port
Shown with breather valve installed D-2 Governor

D-2A Governor

D-2/SV-1 Governor Module
ST-1, ST- 3 and ST-4 Safety Valves

Inlet Regulating Valve

Inlet Check Valves
Inlet Check Valves (or ICV) are used on naturally aspirated compressors to prevent oil mist from entering the inlet line during the unloaded cycle. The inlet check valve either mounts to the intake side of the compressor (and must be used in conjunction with an inlet valve stop or inlet adapter), or may be mounted remotely.
Reservoirs and Components
Reservoirs (or air tanks) serve the air brake system as a storage tank for compressed air. The reservoir size is selected by the vehicle manufacturer to provide an adequate amount of air for use by the braking system and other control devices. Bendix reservoirs are built in accordance with SAE specifications and are available in various sizes in both single and double compartment design configurations, and are certified to comply with government regulations (such as FMVSS 121). Reservoir draining devices are installed in air brake reservoirs, and allow liquid contaminants collected to be drained off. Vehicles without air dryers are normally drained each day. Vehicles which have Bendix desiccant air dryers should be drained every 30-90 days. [Tip: The presence of water may indicate that the air dryer cartridge may need to be replaced. Other potential sources of water in the reservoirs are: when shop air has been used to fill the system, an excessive duty cycle, or excessive air leakage.] Manual draining devices consist of drain cocks which require manual operation at the point at which they are installed. Drain cocks are available in various styles and pipe thread sizes. [Tip: Always drain contents slowly for best results.] The Bendix DV-2 automatic reservoir drain valve is a completely automatic draining device. It is installed directly into the end or bottom drain port of the reservoir and does not require any additional control lines. It is available in either an end-port or bottomport version, and with or without a (12v or 24v) heater. These are most suitable for systems without a desiccant air dryer. Single Check Valves The in-line single check valve allows air flow in one direction only. Several sizes and configurations are available to accommodate various piping arrangements. Single check valves are used in air brake systems to prevent loss of remaining system pressure if another reservoir, or hose etc. upstream in the system fails. For double check valves and pressure protection valves, see page 14.

Reservoirs are available in many configurations.

Drain Cock

DV-2Automatic Drain Valve

SC-3 Single Check Valves

LP-2 Low Pressure Indicator
LP-3 Low Pressure Indicator
Low Pressure Indicators Low pressure indicators are pressure-operated electropneumatic switches that are designed to complete an electrical circuit and actuate a warning light and buzzer for the driver in the event air pressure in the service brake system is below a minimum level for normal operation. The low pressure indicator is available in various pressure settings, is not adjustable, and is generally used in conjunction with a dash mounted warning lamp or warning buzzer or both.

Air Dryers

The air dryer is an in-line filtration system that removes both water vapor and oil droplets from the compressor discharge air after it leaves the compressor. This results in cleaner, drier air being supplied to the air brake system, and aids in the prevention of air line and component freeze-ups in winter weather. Air dryers typically use a replaceable cartridge containing a desiccant material and an oil separator. Most of the oil droplets are removed by the oil separator as the air passes into the air dryer. The air then moves through the desiccant material which removes most of the water vapor. When the air pressure in the supply air tank reaches the required level, the governor makes the compressor stop building air and allows the air dryers purge cycle to begin. During the purge cycle the desiccant material is regenerated (its ability to remove water is renewed) by a reversal of the saturation process. A small amount of dry air passes back through the desiccant material and the water that has been collected, as well as any oil droplets collected by the oil separator, are purged out through the base of the dryer. It is normal to see a small amount of oil around the purge valve. The air dryer end cover is typically equipped with an (12 or 24 volt) integral heating element. The AD-2, AD-4, AD-9 and AD-IP air dryers are designed with an internal storage (purge volume) of dry air for the purge cycle. The AD-IS air dryer is an integral purge air dryer module, which includes a spin-on desiccant cartridge, governor, reservoir and charging valve components in a module. These have been designed as an integrated air supply system. The DRM module includes an AD-IS integrated solution air dryer, a reservoir (including a separate purge reservoir section), a governor, and four pressure protection valves as an integrated air supply system. Extended Purge air dryers are designed with an extra amount of air storage internally that is used to assist in the purge cycle. An example is the AD-IP EP air dryer. Several Bendix air dryers are available in specialized Drop-in versions designed especially for air systems that use either the Holset (Cummins) Type E or QE air compressor. These Holset compressors utilize an unusual unloading system that requires that air pressure remain in the discharge line during the entire unloaded cycle of the compressor. For example, the AD-IP Drop-in version is shown here.

AD-IP Air Dryer AD-4 Air Dryer (only available

reman.)

AD-2 Air Dryer

AD-IS Air Dryer Module

AD-9 Air Dryer

Dryer Reservoir Module

AD-IP Air Dryer (Drop-in version)

Feedback Line

Special Discharge Port Fitting w/Feedback Line Connection

Air Dryers and Filters

AD-SP Air Dryer
(installation uses SC-PR valve)

SC-PR Valve

System-Guard Trailer Air Dryer
The AD-SP air dryer uses a small amount of air from the supply and front axle (secondary) reservoirs to perform the purge function. Because of this difference, the AD-SP air dryer is smaller and lighter than air dryers that have their purge volume within the dryer canister. An SC-PR Single Check Protection Valve is used in conjunction with the AD-SP air dryer. The SC-PR single check protection valve is a combination of two separate devices, a single check valve and a pressure protection valve that allows limited flow in the opposite direction. It serves as a means of protecting the air pressure in the front axle service reservoir, since it will only allow its air supply to be used to help purge the AD-SP air dryer if the pressure is above a certain preset level.

Trailer Products

Cyclone DuraDrain Trailer Water Separator
System-Guard Trailer Air Dryer AF-3 In-line Air Filter
place of a dryer normally located on the power unit, but acts as a buffer to remove moisture during wet times and gives up moisture during dry times.

EverFlow Module

PuraGuard system filter

(obsolete)

PuraGuard QC oil coalescing filter
PuraGuard Filters EverFlow Module The EverFlow air dryer module is used for air dryer systems where a vehicle needs a continuous flow of air, such as for bulk unloaders and central tire inflation. As stated earlier, air dryers need to go through a purge cycle periodically to refresh the moisture-removing desiccant material. EverFlow air dryer modules have two air dryers plumbed in parallel that take turns supplying air, resulting in a continuous, uninterrupted supply. System-Guard Trailer Air Dryer The System-Guard trailer air dryer removes moisture and contaminates from the trailer air system. It is designed to protect the trailer air brake system when, for short periods of time, the trailer is pulled by vehicles without an air dryer or during times when the trailer is disconnected from the tractor. It does not take the
The PuraGuard QC oil coalescing filter (and its predecessor PuraGuard system filter) are for high air use vehicles such as transit buses and refuse trucks. Installed downstream of the air dryer, these filters use a replaceable filter element mounted within a sump housing to remove oil aerosols before they can enter the air system. A drain valve allows periodic maintenance. Cyclone DuraDrain Trailer Water Separator The Cyclone DuraDrain trailer water separator is installed in the trailer control and/or supply lines near the gladhands. It self-purges liquid contaminates, contains solid contaminants and improves the life of the trailer system components. AF-3 In-line Air Filter The AF-3 in-line air filter screens out foreign material from trailer air lines.

Miscellaneous Charging System Related Components
A double check valve is used in the air system when a single function or component must receive air from, or be controlled by, the higher of two sources of pressure. An internal disc or shuttle moves in response to the higher air pressure and allows that air source to flow out of the delivery port. It is recommended that double check valves be mounted so that the shuttle (or disc) operates horizontally. While not strictly part of the charging system, the DS-2 double check valve and stop light switch (shown on this page) performs the function of both a stop lamp switch and a double check valve. In some vehicle brake systems, it is used to detect air pressure from either brake circuit source, and will operate the stop lamp switch, lighting the stop lamps. Auxiliary Systems Vehicle auxiliary components and systems (air actuated wipers, suspension, etc.) requiring compressed air must wait until the reservoirs in the charging system have reached a predefined minimum pressure, sufficient for braking purposes. Once the system has reached the preset minimum, pressure protection valves open to supply auxiliary systems. Pressure Protection Valves The pressure protection valve is a normally-closed pressure sensitive control valve. These valves can be used in many different applications but are typically used to protect or isolate one reservoir from another, by closing automatically at a preset pressure. The valve is also commonly used to delay the filling of auxiliary reservoirs until a preset pressure is achieved in the primary or braking reservoirs. Pressure protection valves allow air to be "shared" between two reservoirs above the closing setting of the valve. The sharing ceases when pressure drops below the closing pressure of the valve and the reservoirs are then isolated from each other. The PR-2 pressure protection valve is externally adjustable, while the PR-4 pressure protection valve (shown) has a fixed setting. Both valves are available in various factory preset pressure settings. The PR-3 pressure protection valve differs from the two previously mentioned since its design includes a check valve preventing air return. Pressure Reducing Valves The pressure reducing valve is used in various applications where a constant set air pressure lower than supply pressure is required. A typical application is an air operated accessory that requires less than system pressure for operation. The RV-1 pressure

Device. SD number. (BW #) EC-14 Antilock Controller Assy. SD-13-4784. (BW1670) EC-15 Antilock Controller Assy. SD-13-4785. (BW1663) EC-16 Antilock Traction ECU. SD-13-4787. (BW1726) EC-17 Antilock Traction ECU. SD-13-4788. (BW1910) EC-30 Antilock Traction ECU. SD-13-4815. (BW2160) EC-60 ABS/ATC Controllers. SD-13-4863. (BW2428) ET-2 Electronic Throttle. SD-15-4106. (BW1650) ET-S & ET-S2 Suspended Electronic Treadles. SD-15-4111. (BW1837) FD-1 Fan Clutch. SD-09-8501. (BW1451) FD-2 Fan Clutch. SD-09-8503. (BW1598) FD-3 TorqueMaster Fan Clutch. SD-09-8504. (BW1452) FD-L Fan Clutch. SD-09-8505. (BW1603) Gen 4 and Gen 5 ABS for Trucks, Tractors, and Buses. SD-13-4746. (BW2261) Hydro-Max Power Brake System. SD-20-6602. (BW1485) IRV Inlet Regulating Valve. SD-01-3408. (BW1552) LP-2 & LP-3 Low Pressure Indicators. SD-06-1600. (BW1447) LQ-2 Valve & TW-1 Control Valve. SD-03-950. (BW1439) LQ-3 & LQ-4 Front Axle Ratio Valves. SD-03-951. (BW1573) LQ-5 Bobtail Ratio Valve. SD-03-953. (BW1625) M-12 Antilock Modulator. SD-13-4772. (BW1669) M-21 Antilock Modulator. SD-13-4793. (BW1664) M-30 Antilock Modulator Assy. SD-13-4830. (BW2085) M-32 and M-32QR Antilock Modulator Assemblies. SD-13-4870. (BW2335) Manual Slack Adjuster. SD-05-1200. (BW1453) MC-11 Trailer Antilock. SD-13-4761. (BW1671) MC-12 Trailer Antilock. SD-13-4762. (BW1667) MC-30 Trailer ABS Controller Assy. SD-13-4834. (BW2189) MV-2 Module Control Module. SD-03-3412. (BW1584) MV-3 Module Dash Control Module. SD-03-3415. (BW1613) Piggyback Spring Brake. SD-02-4500. (BW2106) PP-1 , PP-2 , PP-5 , PP-8, & RD-3 Push-Pull Type Control Valves. SD-03-3611. (BW1578) PP-3 Trailer Supply Valve. SD-03-3613. (BW1437) PP-7 Trailer Supply Valve. SD-03-3617. (BW1579) PP-DC Park Control Valve. SD-03-3619. (BW1739) PR-2 , PR-3 & PR-4 Pressure Protection Valves. SD-03-2010. (BW1440) PuraGuard QC Oil Coalescing Filter. SD-08-187B. (BW2396) PuraGuard System Filter. SD-08-187. (BW2084) QR-1C Quick Release Valve w/Double Check. SD-03-904. (BW1585)
Service Data Sheet Index, continued
For the complete Service Data Sheet Catalog, order BW9600
Device. SD number. (BW #) QR-L Quick Release Valve Inline. SD-03-906. (BW1808) QRN-2 Quick Release Valve. SD-03-907. (BW1786) QR-N Quick Release Valve. SD-03-905. (BW1586) QRV & QR-1 Quick Release Valve. SD-03-901. (BW1442) R-12DC Relay Valve with Biased Double Check. SD-03-1068. (BW1933) R-12P Pilot Relay Valve. SD-03-1063. (BW1711) R-12 & R-14 Relay Valve. SD-03-1064. (BW1431) R-6 Relay Valve. SD-03-1060. (BW1432) R-7 Modulating Valve. SD-03-4504. (BW1445) R-8P Pilot Relay Valve. SD-03-1061A. (BW1660) R-8 Relay Valve. SD-03-1061. (BW1569) RE-6 & RE-6NC Relay Emergency Valves. SD-03-1151. (BW1570) Reservoirs. SD-04-400. (BW1590) RV-1 Pressure Reducing Valve. SD-03-3510. (BW1577) RV-3 Pressure Reducing Valve. SD-03-3515. (BW1587) RV-4 Pressure Reducing Valve. SD-03-3520. (BW1588) SC-1 Single Check Valves. SD-03-2201. (BW1441) SC-3 In-Line Single Check Valve. SD-03-2205. (BW1892) Single Anchor Pin Cam Brake. SD-22-3250. (BW1458) SL-3 & SL-4 Stop Light Switches. SD-06-1800. (BW1593) SL-5 Switch & DS-2 Stop Light Switch & Combined Stop Light Switch & Double Check Valves. SD-06-1804. (BW1594) SR-1 Spring Brake Valve. SD-03-4508. (BW1589) SR-2 Trailer Spring Brake Valve. SD-03-4510. (BW1435) SR-4 Spring Brake Control Valve. SD-03-4514. (BW1571) SR-5 Trailer Spring Brake Valve. SD-03-4516. (BW1680) SR-7 Spring Brake Modulating Valve. SD-03-9043. (BW2271) ST-1 & ST-3 Safety Valves. SD-03-1901. (BW1583) SV-1, SV-3 & SV-4 Synchro Valve & Trailer Release Valves. SD-03-4020. (BW1574) Device. SD number. (BW #) TC-2 Trailer Control Brake Valve. SD-03-813. (BW1430) TC-4 Modulating Control Valve. SD-03-4503. (BW1566) TC-6 Trailer Control Brake Valve. SD-03-821. (BW1567) TC-7 Trailer Control Brake Valve. SD-03-824. (BW1568) TE-1 Trailer Emergency Stop Light Switch. SD-06-1801. (BW1595) TP-2 Tractor Protection Valve. SD-03-3651. (BW1436) TP-3DC Tractor Protection Valve w/Double Check. SD-03-3656. (BW1760) TP-3 Tractor Protection Valve. SD-03-3652. (BW1572) TP-4 Tractor Protection Valve. SD-03-3653. (BW1438) TP-5 Tractor Protection Valve. SD-03-3655. (BW1575) TR-2 , TR-3 & TR-4 Inversion Valves. SD-03-4650. (BW1581) Trailer System-Guard Air Dryer. SD-08-2416. (BW2083) Tu-Flo 400, 500 & 1000 Compressors. SD-01-326. (BW1420) Tu-Flo 501 Compressor. SD-01-337. (BW1421) Tu-Flo 550 Compressor. SD-01-333. (BW1639) Tu-Flo 600 Compressor. SD-01-336. (BW1560) Tu-Flo 700 Compressor. SD-01-335. (BW1422) Tu-Flo 750 Compressor. SD-01-344. (BW1637) TW-1 , TW-3 , TW-4 , TW-5 & TW-6 Two Way Control Valves. SD-03-3602. (BW1580) TW-N Two Way Control Valve. SD-03-3672. (BW1444) Type 9, 12, 16, 20, 24 & 36 Brake Chambers. SD-02-1302. (BW1426) Type 9, 12, 16, 20, 24, 36 & 50 Rotochambers. SD-02-1336. (BW1561) WS-20 Antilock Wheel Speed Sensor. SD-13-4754. (BW1662) WS-24 Antilock Wheel Speed Sensor. SD-13-4860. (BW2364) XVision Vision System. SD-19-5160. (BW2212)