Bendix BA-921 Air Compressor

Quick Facts

Manufacturer: Bendix Commercial Vehicle Systems
Product Series: BA Series
Model: BA-921
Product Type: Engine-driven reciprocating air compressor
Brake-System Category: Air supply and air management
Compressor Design: Single-cylinder, single-stage reciprocating compressor
Rated Displacement: Approximately 15.8 cubic feet per minute at 1,250 rpm
Cooling: Water-cooled cylinder head with an air-cooled integral crankcase
Lubrication: Vehicle engine lubrication system
Typical Weight: Approximately 28 pounds, depending on configuration
Primary Function: Produces compressed air for commercial-vehicle air-brake and approved auxiliary-air systems
Primary Applications: Medium-duty and heavy-duty trucks, tractors, buses, vocational vehicles, and specialty equipment
Primary Benefit: High air output from a compact single-cylinder compressor design

Overview

The Bendix BA-921 is a single-cylinder, engine-driven reciprocating air compressor designed to produce and maintain compressed air for commercial-vehicle air-brake and approved auxiliary-air systems.

The compressor has a rated displacement of approximately 15.8 cubic feet per minute at 1,250 rpm. This output supports vehicles with substantial air demand while using a compact single-cylinder design.

The BA-921 uses a water-cooled cylinder head and an integral air-cooled crankcase and cylinder-block assembly. It normally receives pressurized lubrication from the engine and is mechanically driven through an application-specific gear arrangement.

Bendix produced Standard and Closed Room versions of the BA-921. These versions have different air-induction requirements and should not be treated as interchangeable without confirming the exact engine and vehicle application.

The Standard version was introduced for several Caterpillar ACERT and Detroit Diesel Series 60 EGR engine applications. The Closed Room version was introduced later for naturally aspirated compressor-air induction and eliminated the external inlet check valve used in certain Standard installations.

Key Characteristics

Single-cylinder reciprocating compressor
Single-stage air compression
Rated displacement of approximately 15.8 cubic feet per minute at 1,250 rpm
Compact high-output design
Engine-driven operation
Engine-supplied lubrication
Water-cooled cylinder head
Air-cooled integral crankcase
Integrated unloader mechanism
External governor control
Standard and Closed Room configurations
Application-specific crankcase and mounting designs
Designed for medium-duty and heavy-duty commercial vehicles
Supports air-brake and approved auxiliary-air equipment
New and genuine remanufactured service options may be available

Major Components

Cylinder head
Cooling plate
Valve plate assembly
Air-inlet port
Discharge ports
Inlet valve
Discharge valves
Unloader piston
Balance piston
Unloader spring
Unloader cover
Safety valve
Piston
Piston rings
Connecting rod
Crankshaft
Crankshaft bearings
Integral crankcase and cylinder block
Application-specific crankcase cover
Oil-supply port
Oil-drain passages
Coolant inlet and outlet ports
Drive gear
Mounting flange
Governor-control port
Gaskets
O-rings
Seals
Mounting fasteners

How the Brake Component or System Works

The vehicle’s engine mechanically rotates the compressor crankshaft. The crankshaft and connecting rod move the single compressor piston up and down within the cylinder.

During the piston’s downward stroke, low pressure develops above the piston. The inlet valve opens and allows filtered air to enter the cylinder.

During the upward stroke, the inlet valve closes. The rising piston compresses the trapped air.

When cylinder pressure exceeds the pressure in the discharge passage, the discharge valves open. Compressed air moves through the discharge port and into the compressor discharge line.

The discharge line carries the hot compressed air to the air dryer. The dryer removes moisture, oil aerosols, and contamination before the air enters the supply reservoir.

The BA-921 does not continuously deliver air at full output. A governor monitors air-system pressure and controls the compressor’s unloader mechanism.

When system pressure falls to the governor’s cut-in setting, the unloader allows the compressor to pump air.

When pressure reaches the governor’s cut-out setting, control air moves the unloader piston. The compressor stops delivering air even though its crankshaft and piston continue moving with the engine.

Position and Function Within the Brake System

The BA-921 is located in the air-supply and charging portion of the commercial air-brake system.

The normal air-flow sequence is:

Engine-driven BA-921 compressor
Compressor discharge line
Air dryer
Supply or wet reservoir
Primary and secondary reservoirs
Brake-system control valves
Brake chambers and actuators
Foundation brakes
The compressor produces compressed air but does not directly apply the brakes.
Air produced by the BA-921 may support:
Service-brake applications
Spring-brake release
Parking-brake control
Emergency-brake operation
Trailer air supply
Air suspension
Automated transmission controls
Central tire-inflation equipment
Bulk unloading equipment
Air-operated accessories
Other approved pneumatic systems

The compressor and complete charging system must be sized for the vehicle’s total air demand.

Common Specifications

Compressor Type: Single-cylinder reciprocating air compressor
Compression Stages: Single stage
Rated Displacement: Approximately 15.8 cubic feet per minute at 1,250 rpm
Typical Weight: Approximately 28 pounds, depending on configuration
Cylinder Head Cooling: Engine coolant
Crankcase Cooling: Air cooled
Lubrication: Pressure lubrication from the vehicle engine
Drive Type: Engine-driven gear arrangement
Pressure Control: External governor controlling the unloader mechanism
Air Induction: Naturally aspirated or application-specific Standard configuration
Cylinder-Head Construction: Application-specific aluminum or cast-iron components
Safety Equipment: Cylinder-head safety valve
Mounting: Engine- and application-specific crankcase and flange
Replacement Availability: New or genuine remanufactured, depending on part number and application

Exact specifications, mounting dimensions, port locations, gearing, and service requirements must be confirmed using the complete Bendix part number and engine application.

Operating Specifications and Performance

The BA-921’s rated displacement provides substantial air delivery from a single-cylinder compressor. Actual installed performance depends on compressor speed, drive ratio, inlet restriction, discharge pressure, system leakage, temperature, and compressor condition.

Performance can be affected by:

Engine idle speed
Compressor rotational speed
Drive ratio
Governor settings
Air-inlet configuration
Air-filter condition
Inlet check valve condition where equipped
Discharge-line length
Discharge-line diameter
Discharge-line restriction
Air-dryer condition
Reservoir capacity
Air-system leakage
Accessory air demand
Piston and ring condition
Valve-plate condition
Unloader operation
Engine oil pressure
Engine coolant flow

The compressor should be evaluated as part of the complete charging system. Slow pressure buildup does not automatically mean the compressor has failed.

Braking Performance and System Integration

The BA-921 does not create braking friction at the wheels, but it supplies the compressed air required by the braking system.

Insufficient compressor performance may result in:

Slow air-pressure buildup
Extended recovery after repeated brake applications
Frequent low-air warnings
Delayed spring-brake release
Reduced stored-air reserve
Frequent compressor loading
Difficulty maintaining trailer air supply
Reduced availability of approved pneumatic accessories

The BA-921 may support vehicles equipped with:

S-cam drum brakes
Air disc brakes
Antilock braking systems
Electronic stability control
Automatic traction control
Electronic parking-brake controls
Single or tandem drive axles
Multiple trailer axles
Auxiliary and lift axles

Brake performance still depends on the air dryer, reservoirs, valves, chambers, foundation brakes, ABS, tires, loading, and driver operation.

Air Supply, Controls, and Electronic Integration

The BA-921 works with an air-compressor governor that monitors reservoir pressure.

The governor provides two primary commands:

Cut in when system pressure falls
Cut out when system pressure reaches the upper operating range

During cut-in operation, the compressor is loaded and supplies compressed air.

During cut-out operation, governor control pressure activates the unloader mechanism and stops normal delivery.

The BA-921 may be integrated with:

Bendix air dryers
Compressor governors
Supply reservoirs
Primary and secondary reservoirs
Pressure-protection valves
Safety valves
Low-air warning devices
Mechanical pressure gauges
Electronic pressure sensors
Engine control modules
Vehicle diagnostic systems
Air-system monitoring equipment

The compressor is primarily mechanical and pneumatic. However, the completed vehicle may use electronic sensors, warning systems, and networked controllers to monitor air-system operation.

Installation, Adjustment, and Brake Balance

Correct installation is required for reliable operation and appropriate compressor life.

Important installation considerations include:

Correct BA-921 version
Complete Bendix part number
Approved engine application
Correct crankcase and mounting flange
Drive-gear compatibility
Gear backlash
Correct compressor rotation
Mounting-fastener torque
Oil-supply connection
Oil-drain alignment
Coolant-line routing
Air-induction configuration
Inlet check valve where required
Discharge-line size
Discharge-line length
Governor-control plumbing
Clearance from exhaust components
Clearance from moving engine components
Correct gaskets and seals
Freedom from oil, coolant, and air leaks

The compressor does not directly control left-to-right or axle-to-axle brake balance. However, inadequate air pressure can affect all brake circuits.

After installation, the charging system should be tested for pressure buildup, governor operation, air-dryer purging, leakage, low-air warnings, and normal brake-system performance.

Foundation Brake, Axle, and Wheel-End Compatibility

The BA-921 can support commercial vehicles using different foundation-brake and axle configurations when the complete air system is properly engineered.

Possible brake and axle applications include:

Air disc brakes
S-cam drum brakes
Steer axles
Single drive axles
Tandem drive axles
Multiple rear axles
Pusher axles
Tag axles
Lift axles
Trailer axles
Bus brake systems
Specialty-vehicle braking systems

Compressor selection depends on more than the foundation-brake design.

Compatibility also depends on:

Number of axles
Number and size of brake chambers
Trailer operation
Reservoir capacity
Air-suspension demand
Vehicle accessories
Engine mounting
Compressor speed
Air-system recovery requirements
Vehicle duty cycle
Applicable braking requirements

Common Applications

Class 6 commercial trucks
Class 7 commercial trucks
Class 8 highway tractors
Regional-haul tractors
Vocational trucks
Dump trucks
Refuse trucks
Concrete mixers
Construction trucks
Logging trucks
Utility trucks
Municipal vehicles
School buses
Transit buses
Motor coaches
Fire apparatus
Emergency vehicles
Terminal tractors
Bulk-hauling equipment
Specialty commercial vehicles
High-air-use applications where properly specified

The BA-921 has been produced for specific engines and vehicle installations. Its use within a vehicle family does not confirm compatibility with every model or production year.

Vehicle and Brake-System Compatibility

The correct BA-921 compressor must match the vehicle’s engine, mounting arrangement, air-induction system, and total pneumatic demand.

Compatibility depends on:

Vehicle manufacturer
Vehicle model
Model year
Vehicle identification number
Engine manufacturer
Engine model
Engine serial number
Standard or Closed Room compressor design
Compressor part number
Crankcase configuration
Mounting flange
Drive gear
Compressor rotation
Cylinder-head design
Air-inlet arrangement
Inlet check valve requirements
Discharge-port position
Governor-control connection
Oil-supply arrangement
Oil-drain arrangement
Coolant-port configuration
Air-dryer capacity
Reservoir capacity
Accessory air demand

A replacement should not be ordered only by the BA-921 model name. Similar-looking BA-921 compressors can have different crankcases, heads, ports, gears, and engine applications.

Advantages

High rated air output from a single-cylinder design
Approximately 15.8 cubic feet per minute at 1,250 rpm
Compact compressor arrangement
Engine-driven reliability
Engine-supplied lubrication
Water-cooled cylinder head
Integrated air-cooled crankcase
Established commercial-vehicle service history
Supports high-air-use applications when correctly specified
Compatible with modern commercial air-brake systems
Works with air dryers and governor controls
New and remanufactured availability for certain applications
Service kits may be available
Broad technical-support resources
Supports trucks, tractors, buses, and vocational equipment

Limitations or Considerations

Single-cylinder design creates distinct operating characteristics
Multiple application-specific configurations exist
Standard and Closed Room versions have different induction requirements
Part numbers may not be interchangeable
Requires proper engine-oil pressure
Requires proper coolant flow
Discharge air becomes extremely hot
Incorrect inlet plumbing can affect performance
Standard versions may require an external inlet check valve
Closed Room versions are restricted to approved naturally aspirated operation
Air leaks can create excessive compressor duty cycle
High duty cycle can increase heat and oil carryover
Carbon can accumulate in the discharge line
Mounting and drive components are engine specific
Some applications may be older or superseded
Replacing the compressor does not correct leaks or restrictions elsewhere in the system

Driver and Operator Experience

A properly operating BA-921 should build pressure within the vehicle manufacturer’s required time and maintain sufficient pressure during normal operation.

Drivers should monitor:

Primary air-pressure gauge
Secondary air-pressure gauge
Low-air warning light
Low-air warning buzzer
Air-pressure buildup time
Governor cut-in
Governor cut-out
Air-dryer purge operation
Frequency of compressor cycling
Parking-brake release
Trailer air-supply operation
Visible or audible air leaks
Air-system warning messages

Frequent compressor loading may indicate leakage or high pneumatic demand rather than an internal compressor problem.

Drivers should report slow pressure buildup, repeated low-air warnings, excessive air-dryer purging, coolant loss, oil leakage, burning odors, or unusual compressor and engine-gear noises.

Maintenance and Ownership Notes

Inspect the compressor for air, oil, and coolant leakage.
Check compressor mounting fasteners.
Inspect the compressor drive for abnormal noise.
Maintain the engine lubrication system.
Verify appropriate engine-oil pressure.
Maintain the engine cooling system.
Inspect coolant hoses and fittings.
Check the air-inlet system.
Maintain the engine air filter.
Inspect the external inlet check valve where equipped.
Check the compressor discharge line.
Inspect for carbon buildup and restriction.
Maintain the air dryer.
Replace the air-dryer cartridge as required.
Drain and inspect the air reservoirs.
Monitor oil and moisture contamination.
Check governor operation.
Measure pressure-buildup time.
Perform air-system leakage tests.
Inspect air lines and fittings.
Monitor compressor duty cycle.
Investigate excessive oil carryover.
Use the correct Bendix maintenance kits.
Follow Bendix and engine-manufacturer service procedures.
Maintenance intervals depend on the vehicle, compressor configuration, air consumption, duty cycle, climate, and operating environment.

Common Brake-System Problems

Slow pressure buildup: Air leaks, a restricted inlet, damaged inlet check valve, restricted discharge line, worn compressor components, low engine speed, governor problems, or air-dryer restrictions may be responsible.
Compressor fails to load: A faulty governor, restricted control line, sticking unloader piston, incorrect plumbing, or internal compressor damage may prevent normal delivery.
Compressor fails to unload: Governor failure, control-line leakage, a blocked control passage, or sticking unloader components may cause continuous pumping.
Excessive compressor cycling: System leakage, high accessory demand, governor problems, unloader leakage, or incorrect pressure settings may cause repeated loading and unloading.
Excessive oil carryover: High duty cycle, inlet restriction, compressor wear, engine crankcase pressure, excessive oil temperature, low oil pressure, or improper oil drainage may contribute.
Compressor overheating: Restricted coolant flow, discharge-line restriction, high duty cycle, improper installation, or inadequate airflow may increase temperature.
Carbon buildup in the discharge line: Excessive discharge temperature, oil carryover, incorrect line size, improper routing, or continuous compressor operation may create deposits.
Coolant leakage: Damaged gaskets, cracked castings, loose fittings, corrosion, or overtightened fittings may allow coolant to escape.
External oil leakage: Damaged seals, loose lines, worn gaskets, excessive crankcase pressure, or mounting problems may cause leakage.
Unusual compressor noise: Drive-gear wear, bearing damage, loose mounting, piston damage, or engine gear-train problems may create knocking or grinding.
Cylinder-head safety valve releases: A restricted or blocked discharge line may create excessive pressure at the compressor head.
Air dryer purges frequently: Air-system leakage, governor malfunction, high accessory demand, or compressor-control problems may cause repeated purging.

Safety and Service Precautions

The commercial air-brake system stores compressed air that can cause injury if released unexpectedly.
Before servicing the compressor:
Park the vehicle on a level surface.
Apply approved parking procedures.
Chock the wheels.
Drain all air reservoirs.
Confirm stored air pressure has been released.
Shut down the engine.
Follow applicable lockout procedures.
Allow the compressor and discharge line to cool.
Drain engine coolant when required.
Disconnect air, oil, and coolant lines safely.
Wear appropriate personal protective equipment.
Do not loosen pressurized fittings.
Do not work near exposed moving gears.
Do not operate the engine with the compressor drive exposed.
Do not overtighten fittings in the cylinder head.
Do not substitute unapproved hoses, tubing, fittings, or fasteners.
The discharge line and cylinder head may become hot enough to cause severe burns.
After service, test air-pressure buildup, leakage, governor operation, air-dryer purging, safety-valve operation, warning devices, and the completed brake system.

Identification Information

BA-921 identification information is commonly stamped on the compressor crankcase cover or shown on an attached identification area.

Record the following:

Bendix BA-921 model designation
Standard or Closed Room version
Bendix part number
Customer piece number
Serial number
Remanufactured part number when applicable
Vehicle manufacturer
Vehicle identification number
Vehicle model and model year
Engine manufacturer
Engine model
Engine serial number
Compressor crankcase configuration
Mounting-flange design
Drive-gear information
Cylinder-head design
Air-inlet arrangement
Inlet check valve equipment
Discharge-port location
Coolant-port arrangement
Oil-supply connection
Governor-control arrangement

Photographs of the identification markings, mounting flange, drive gear, cylinder head, ports, and connected lines can help verify the correct replacement.

Buying Considerations

Confirm that the compressor is a Bendix BA-921.
Determine whether it is the Standard or Closed Room version.
Record the complete Bendix part number.
Record the customer piece number.
Check for superseded part numbers.
Verify the vehicle identification number.
Record the engine model and serial number.
Confirm the crankcase and mounting flange.
Verify drive-gear compatibility.
Confirm compressor rotation.
Match the cylinder-head design.
Verify air-induction requirements.
Determine whether an external inlet check valve is required.
Confirm discharge-port location.
Match oil-supply and oil-drain connections.
Verify coolant-port locations.
Confirm governor compatibility.
Determine whether a new or remanufactured unit is appropriate.
Check whether the drive gear is included.
Check whether fittings, gaskets, and hardware are included.
Inspect the discharge line and air dryer before installation.
Correct air-system leakage before replacing the compressor.

Variants and Configurations

The BA-921 family includes multiple engine- and vehicle-specific configurations.

Important versions include:

Standard BA-921 compressor
Closed Room BA-921 compressor
New compressor assemblies
Genuine remanufactured compressor assemblies

Additional differences may include:

Bendix part number
Customer part number
Crankcase design
Mounting flange
Drive gear
Compressor rotation
Cylinder-head material
Cylinder-head configuration
Air-inlet port
External inlet check valve
Discharge-port position
Coolant-port arrangement
Oil-supply connection
Oil-drain arrangement
Governor connection
Rear-cover design
Engine application
Vehicle manufacturer application

The complete part number and application information must be used when comparing compressors or ordering replacements.

Comparison to Similar Equipment

Compared with the Bendix Tu-Flo 550 Air Compressor, the BA-921 uses a single-cylinder design while providing higher nominal displacement. The Tu-Flo 550 uses a two-cylinder compressor architecture and serves a different group of applications.

Compared with the Bendix BA-922, the BA-921 generally provides lower air delivery. The BA-922 may be used in applications with even greater compressed-air demand.

Compared with smaller commercial air compressors, the BA-921 provides higher output that can support vehicles with more axles, frequent brake applications, or air-operated accessories.

Compared with an electric compressor, the BA-921 is mechanically driven by the engine and normally shares the engine’s lubrication and cooling systems.

Different Bendix compressor families should not be considered interchangeable without verifying mounting, drive, output, air induction, cooling, lubrication, and vehicle requirements.

Best Fit For

Vehicles originally equipped with a Bendix BA-921
Medium-duty and heavy-duty commercial vehicles
Vehicles requiring high air delivery from a compact compressor
Highway tractors
Vocational trucks
Commercial buses
School buses
Transit buses
Refuse vehicles
Construction trucks
Dump trucks
Concrete mixers
Fire apparatus
Specialty commercial chassis
Fleets seeking genuine remanufactured replacement availability
Applications with compatible engine mounting and air-induction requirements
The BA-921 is best treated as an application-specific replacement rather than a universal compressor conversion.

Related Vehicle and Trailer Types

Complete Guide to Semi Truck Types
Class 6 vs Class 7 vs Class 8 Trucks
Highway tractors
Regional tractors
Day cab trucks
Sleeper trucks
Straight trucks
Dump trucks
Concrete mixers
Refuse trucks
Construction trucks
Logging trucks
Municipal trucks
Commercial buses
School buses
Transit buses
Fire apparatus
Emergency vehicles
Terminal tractors
Specialty commercial vehicles

Related Truck and Trailer Models

Related Brake System Types

Related Brake Products

Related Equipment Systems

Brake Systems
Engines
Transmissions
Axles & Differentials
Suspension Systems
Electrical Systems
Equipment Systems
Air dryers
Air reservoirs
Compressor governors
Pressure-protection valves
Vehicle air-management systems
Engine lubrication systems
Engine cooling systems

Related Guides

Regulatory and Compliance Notes

The air compressor is part of a safety-critical commercial-vehicle braking system.

The completed air system must meet applicable requirements for:

Pressure buildup
Air-system recovery
Governor cut-in and cut-out
Low-air warnings
Reservoir capacity
Air leakage
Service-brake operation
Parking-brake operation
Emergency-brake operation
Trailer air supply

Replacement components should preserve the vehicle’s approved air-system configuration.

Installing a compressor with greater rated displacement does not automatically increase the vehicle’s braking capability or certified weight ratings.

Commercial air-brake repairs may be subject to technician qualifications, inspection requirements, and service regulations depending on the jurisdiction.

Real World Operating Notes

The BA-921 is frequently used in vehicles with substantial compressed-air demand. However, uncontrolled air leakage can still make a correctly operating compressor run excessively.

Air-system leakage is a common reason compressors experience high duty cycles, excessive heat, and increased oil carryover.

Before replacing the compressor, technicians should inspect the air system, governor, air dryer, discharge line, reservoirs, and pneumatic accessories.

The discharge line should be inspected whenever a compressor is replaced. A carbon-restricted line can cause high cylinder-head temperature, activate the compressor safety valve, or damage a replacement compressor.

Standard and Closed Room compressors must be identified correctly. Connecting a Closed Room version to an unapproved turbocharged air source can create improper compressor operation.

Frequently Asked Questions

What is the Bendix BA-921?

The Bendix BA-921 is a single-cylinder, engine-driven reciprocating compressor that supplies compressed air for commercial-vehicle air brakes and approved pneumatic accessories.

What is the BA-921’s rated displacement?

Bendix service information lists approximately 15.8 cubic feet per minute at 1,250 rpm.

How many cylinders does the BA-921 have?

It uses one compressor cylinder.

Is the BA-921 water cooled?

Its cylinder head is cooled by engine coolant. Its integral crankcase and cylinder block are air cooled.

Is the BA-921 lubricated by the engine?

Yes. It normally receives pressurized lubricating oil from the engine.

What is the difference between Standard and Closed Room versions?

The versions use different cylinder-head and air-induction arrangements. Certain Standard installations require an external inlet check valve. The Closed Room version is intended for approved naturally aspirated operation.

Can the Closed Room BA-921 use turbocharged intake air?

Bendix service information specifies that the Closed Room version should only use its approved naturally aspirated air-induction arrangement.

What controls the BA-921’s pressure?

An external governor monitors system pressure and controls the compressor’s unloader mechanism.

Why does the compressor run frequently?

Air leaks, high accessory demand, governor problems, unloader leakage, or an demanding duty cycle may cause frequent operation.

What causes slow pressure buildup?

Possible causes include air-system leakage, inlet restriction, discharge-line restriction, worn compressor components, low engine speed, governor problems, or air-dryer restrictions.

What causes the compressor safety valve to open?

A restricted or blocked discharge line can create excessive pressure in the compressor cylinder head.

Are all BA-921 compressors interchangeable?

No. Standard and Closed Room versions, crankcases, gears, mounting arrangements, ports, and engine applications can differ.

Is a remanufactured BA-921 available?

Bendix has expanded genuine remanufactured BA-921 availability through authorized dealers and distributors for supported applications. Availability still depends on the exact part number. Bendix BA-921 remanufactured-compressor information.

How can the correct replacement be identified?

Use the Bendix part number, customer piece number, serial number, compressor version, vehicle VIN, engine model, engine serial number, crankcase, drive gear, and port configuration.

Availability and Where to Find

Bendix BA-921 compressors may be available as new service units, genuine Bendix remanufactured units, aftermarket replacements, used assemblies, or rebuildable cores, depending on the application.

Replacement compressors and service parts may be available through:

Authorized Bendix distributors
Commercial-truck dealerships
Engine dealerships
Heavy-duty parts suppliers
Fleet maintenance facilities
Commercial air-brake specialists
Authorized remanufacturers
Online heavy-duty parts suppliers

Before ordering, confirm the complete part number, Standard or Closed Room configuration, engine application, crankcase, mounting flange, drive gear, air induction, discharge ports, coolant connections, and oil connections.

Current product support, technical documentation, parts identification, and distributor information are available through the Bendix Services and Support website.

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