Bendix® BA-922® Compressor Installation and Application Review
Bendix® BA-922® Compressor
Complete one Compressor Installation and Application Review Form for each fleet installation
arrangement (vehicle type/engine combination) and send to:
Bendix Commercial Vehicle Systems LLC
Attn: Engineering Manager of Charging
901 Cleveland Street
Elyria, Ohio 44035
Note: Measurements should be made with commercial grade instruments with tolerances of 3% max.
Caution: When working on vehicles and/or carrying out testing procedures, always follow standard
industry safety guidelines, including the use of adequate eye protection, etc.
Compressor Part Number: ______________________________________________
Compressor Serial Number: _____________________________________________
Vehicle Make and Model: ______________________________________________
Engine Make and Model: ______________________________________________
Engine Serial/Unit Number: ____________________________________________
Submitted By: ______________________________________________
Employed By: ______________________________________________
Date submitted: _____________________________________________
The following items should accompany this form:
• Attach any available air system schematic
• Attach engine data sheets
• Attach available technical information for associated components
• Attach photos of the compressor installation
• Attach photos of the compressor air inlet hose arrangement
• Attach photos of the compressor governor arrangement
• Attach photos of any devices in the discharge line
• Attach photos of the air dryer
Page 1 of 14
BW2514 ©2006 Bendix Commercial Vehicle Systems LLC • All Rights Reserved • 3/22/06 • rev: 1.
Bendix® BA-922® Compressor Installation and Application Review
Section I Application Information
Check the boxes that best apply and use the comments space to further clarify:
On-Highway and Linehaul
Straight Truck
Single trailer
Double trailer
Triple trailer
Motor Coach
RV
Other :
Vocational
Delivery
Dumper/Mixer
Terminal Jockey
Bulk Unloader
Transit Bus
Crash/Fire/Rescue
Other :
Off-Highway and Military
Description:
Page 2 of 14
BW2514 ©2006 Bendix Commercial Vehicle Systems LLC • All Rights Reserved • 3/22/06 • rev: 1.
Bendix® BA-922® Compressor Installation and Application Review
Section II Vehicle Features Requiring Air
Check the boxes that best apply and use the comments space to further clarify:
Air brakes
Multiple axles
Number of axles: _________________________________
Air suspension
Description:
Bulk Unloading
Typical time to unload: _________________________
Frequency of unloading events: __________________
Central Tire Inflation
Description:
Kneeling capability (bus feature)
Doors or windshield wipers
Air park or door interlock
Other:
Description:
Page 3 of 14
BW2514 ©2006 Bendix Commercial Vehicle Systems LLC • All Rights Reserved • 3/22/06 • rev: 1.
Bendix® BA-922® Compressor Installation and Application Review
Section III Vehicle/Engine Requirements and Expectations
Life expectation (in hours or miles): _________________________________
Duty Cycle expectation (percent time compressor operates loaded):
Recommended Test Procedure:
Installation angles:
Engine installation angle: _____________________________________
Compressor rotated angle: _____________________________________
Gradability (vehicle operation on slope):
Side: _______________________________________________________
For/Aft: ____________________________________________________
Percent of time operated on inclines? _____________________________
Compressor delivery/system pressure: _________________________________
Engine rated speed: _______________________________
Air compressor drive ratio: _________________________
5% to 25%
25% to 35%
greater than 35%
Install a pressure switch (60 - 90 psi) in the governor signal line. Record the switch voltage
or continuity during vehicle operation. The duty cycle is the quotient of the compressor
loaded time (low pressure in the signal line) and the total time. The total time of the test
should reflect a typical operation cycle of the vehicle.
Was duty cycle measured? NO
YES
Measured value: _____________
Page 4 of 14
BW2514 ©2006 Bendix Commercial Vehicle Systems LLC • All Rights Reserved • 3/22/06 • rev: 1.
Bendix® BA-922® Compressor Installation and Application Review
Compressor Thru-drive:
Pump Drive (For new applications go to Appendix D of BW-121-A)
Thru-drive to be used for: ______________________________________
Installed pump: ________________________________________
Vendor/PN: ___________________________________________
Operating HP: _________________________________________
Operating torque: _______________________________________
Worst case torque (consider spikes and cold operation): _________
Worst case HP (consider spikes and cold operation): ___________
Describe pump/motor control system:
Comments:
Page 5 of 14
BW2514 ©2006 Bendix Commercial Vehicle Systems LLC • All Rights Reserved • 3/22/06 • rev: 1.
Bendix® BA-922® Compressor Installation and Application Review
Section IV Air System Components
Inlet Line
Filter source
Clean _____________________
Recommended Test Procedure:
Measured compressor air inlet restriction:
Engine Air Filter
Allowable engine air inlet restriction (see the engine manufacturer’s engine data
sheet):
Dirty _____________________
Install a water manometer (gauge) to read the pressure at the air inlet fitting
on the compressor. If the compressor shares the engine air intake system
then restrict the engine air filter such that at rated engine power and speed
the engine is at its maximum allowable inlet restriction for a dirty filter (see
the engine data sheet). Under this condition operate the engine at rated
speed and power and read the pressure at the compessor air inlet fitting
while the compressor is loaded/pumping.
(measured at compressor at rated engine speed and power with a dirty filter )
_______________________________________
Dedicated air compressor filter
Description:
Page 6 of 14
BW2514 ©2006 Bendix Commercial Vehicle Systems LLC • All Rights Reserved • 3/22/06 • rev: 1.
Bendix® BA-922® Compressor Installation and Application Review
Measured compressor air inlet restriction:
(measured at compressor at rated engine speed with a dirty filter)
_______________________________________
Line size _____________________________________
Line length ___________________________________
Expected/Measured Worst Case Inlet Air Temperature: _______________
Was measured restriction less than 30 in H
O? YES NO
2
Is inlet air temperature greater than 170°F? YES
NO
Recommended Test Procedure:
Install a temperature probe in the air compressor inlet hose or fitting as close to the
compressor as possible. Operate the vehicle such that the engine is at operating
temperature and the compressor is loaded/pumping. Record the compressor air inlet
temperature and note the ambient temperature. To obtain the maximum air inlet
temperature, add the difference between the recorded inlet temperature and the noted
ambient temperature to the maximum expected ambient temperature.
Was the restriction measured per the recommended procedure? YES
NO
If no, describe procedure:
Page 7 of 14
BW2514 ©2006 Bendix Commercial Vehicle Systems LLC • All Rights Reserved • 3/22/06 • rev: 1.
Bendix® BA-922® Compressor Installation and Application Review
Discharge line
First component after compressor (filters, separators, traps, dryers)
What: _________________________________________
Distance to: ____________________________________
Second component after compressor (filters, separators, traps, dryers)
What: _________________________________________
Distance to: ____________________________________
Third component after compressor (filters, separators, traps, dryers)
What: _________________________________________
Distance to: ____________________________________
Is the discharge piping routed in a downhill manner to the air dryer?
Measured compressor discharge pressure
Recommended Test Procedure:
Was measured discharge pressure greater than 150 psi? YES
Line ID size to: ____________________________________
Line ID size to: ____________________________________
Line ID size to: ____________________________________
YES
(measured at the compressor) ______________________
Install a pressure gauge at the discharge fitting of the compressor and record the
discharge pressure at the time of governor cut-out.
Note, any devices in the discharge line between the compressor and air dryer should
represent their maximum possible restriction when the discharge pressure of the
compressor is being measured.
NO
NO
Page 8 of 14
BW2514 ©2006 Bendix Commercial Vehicle Systems LLC • All Rights Reserved • 3/22/06 • rev: 1.
Bendix® BA-922® Compressor Installation and Application Review
Total air reservoir capacity? _________________________
Charge time required to raise the reservoir
pressure from governor cut in to cut out
at rated engine speed? _________________________________
Recommended Test Procedure:
Drain down the entire air system (supply, service and accessory tanks) to below 75 psi. As
the compressor begins to charge the system, start a timer when the tank pressure reaches
the governor cut in pressure. Stop the timer when the compressor cuts out (dryer purge can
usually be heard)
Was measured charge time less than 90 seconds? YES
Coolant Supply
Source: _________________________________________
Line size to: ____________________________________
Distance to: ____________________________________
Maximum allowable engine coolant temperature: ______________
Maximum expected compressor coolant temperature: ___________
Recommended Test Procedure:
Is the maximum expected compressor coolant supply temperature less than 220°F?
YES
NO
Install a temperature probe in the coolant supply fitting on the compressor and
either monitor or measure the engine coolant temperature (at thermostat housing).
Operate the vehicle such that the engine reaches operating temperature. Record the
engine coolant temperature and the compressor coolant supply temperature. The
maximum expected compressor coolant temperature is the sum of the recorded
compressor coolant temperature and the difference between the recorded engine
coolant temperature and the maximum allowable engine coolant temperature.
NO
Page 9 of 14
BW2514 ©2006 Bendix Commercial Vehicle Systems LLC • All Rights Reserved • 3/22/06 • rev: 1.
Bendix® BA-922® Compressor Installation and Application Review
Coolant Return
Return Port Location: _____________________________
Line size to: ____________________________________
Distance to: ____________________________________
Measured coolant flow rate
At engine idle: ______________________
At engine rated speed: _________________
Recommended Test Procedure:
Was measured flow rate greater than .6 gpm at idle and 1.9 gpm at rated speed?
Measured Coolant Pressure Drop - alternative measurement
(pressure drop between inlet fitting and return fitting)
At engine idle: ______________________
At engine rated speed: _________________
Recommended Test Procedure:
Was measured pressure drop greater than 1.0 psi at idle and greater than 4.4 psi at rated speed?
Install a flow meter in series with the coolant supply or return line of the air
compressor. Note the flow rate through the compressor when the engine
thermostats are open at engine idle and rated speed.
YES
Install pressure gauges at the inlet and outlet fittings of the air compressor. Record
the pressures (or pressure difference) at idle and rated speed.
YES
NO
NO
Page 10 of 14
BW2514 ©2006 Bendix Commercial Vehicle Systems LLC • All Rights Reserved • 3/22/06 • rev: 1.
Bendix® BA-922® Compressor Installation and Application Review
Compressor Oil Supply
Source: _________________________________________
Line size to: ____________________________________
Distance to: ____________________________________
Compressor Oil Return
Measured Oil Supply Pressure (record at compressor fitting at engine idle):
_______________________________________________________
Recommended Test Procedure:
Install a pressure gauge at the oil fitting on the air compressor. Record the oil pressure at
engine idle with the engine at normal operating temperature.
Was measured oil supply pressure greater than 14.0 psi ? YES
Describe any auxiliary fittings at the oil supply of the compressor:
Return through front flange
Return through bottom drain only
Return through both bottom drain and front flange
NO
Page 11 of 14
BW2514 ©2006 Bendix Commercial Vehicle Systems LLC • All Rights Reserved • 3/22/06 • rev: 1.
Bendix® BA-922® Compressor Installation and Application Review
Governor location
Compressor control
Governor for Compressor Unloader
Governor part number and/or vendor: _______________________
Cut out pressure: _______________________________________
Range or band: _________________________________________
Governor with discharge line unloading
Governor part number and/or vendor: _______________________
Cut out pressure: _______________________________________
Range or band: _________________________________________
Governor air signal line size/length: ____________________________________
Governor air control line size/length: ___________________________________
Compressor mounted
Remote
Page 12 of 14
BW2514 ©2006 Bendix Commercial Vehicle Systems LLC • All Rights Reserved • 3/22/06 • rev: 1.
Bendix® BA-922® Compressor Installation and Application Review
Air Dryer
Air Dryer part number and/or vendor: ____________________________
Maximum allowable temperature to the dryer: _____________________
Minimum allowable temperature to the dryer: _____________________
Recommended Test Procedure:
Measured inlet temperature to the dryer: __________________________
Ambient temperature at time of measurement: _____________________
What is the maximum expected ambient temperature? ______________
What is the minimum expected ambient temperature? _______________
What is the maximum expected dryer inlet temperature? ______________
What is the minimum expected dryer inlet temperature? ______________
Install a temperature probe at the air dryer inlet fitting. Operate the vehicle such
that the engine is at operating temperature. Drain an air tank such that the
compressor runs continuously but the pressure remains about 10 psi below the
governor cutout pressure. Note the dryer air inlet temperature after the compressor
has run for 90 seconds. Also note the ambient temperature. To obtain the
maximum air inlet temperature, add the difference between the recorded inlet
temperature and the noted ambient temperature to the maximum expected ambient
temperature. Likewise, to obtain the minimum expected inlet temperature, add the
temperature difference to the minimum expected ambient temperature.
Page 13 of 14
BW2514 ©2006 Bendix Commercial Vehicle Systems LLC • All Rights Reserved • 3/22/06 • rev: 1.
Bendix® BA-922® Compressor Installation and Application Review
COMMENTS
Does the compressor installation meet all Bendix Commercial Vehicle Systems requirements?
(See BW-121-A, BW-110-A and BW-109-A for complete application and installation req uirements.)
ACCEPTED? YES No
APPROVED BY: ________________________________ (Engineer) DATE: _______________
APPROVED BY: ________________________________ (Manager) DATE: _______________
COMMENTS / EXCEPTIONS:
BENDIX ENGINEERING USE ONLY
YES No
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
_____________________________________________________________________________________
Page 14 of 14
BW2514 ©2006 Bendix Commercial Vehicle Systems LLC • All Rights Reserved • 3/22/06 • rev: 1.
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