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A-4

Air Brake Charging System Troubleshooting

1.0  Oil Test Card 
Results

Not a valid test.

Discontinue using this test.

  

Do not use this card test to diagnose compressor 
"oil passing" issues.  They are subjective 
and error prone.  Use only the Bendix

®

 Air 

System Inspection Cup (BASIC

) test and the 

methods described in this guide for advanced 
troubleshooting.

The Bendix

®

 BASIC

 test should be the 

defi nitive method for judging excessive 
oil fouling/oil passing.  

(See Appendix A, 

on page A-16 for a fl owchart and expanded 
explanation of the checklist used when 
conducting the BASIC

 test.)

Symptom: 

What it may indicate: 

What you should do:  

How to use this guide:
Find the 

symptom(s)

 that you see, then move to the right 

to  fi nd the possible causes (“

What it may indicate

”) and 

remedies (“

What you should do

”).

Review the warranty policy before performing any intrusive 
compressor maintenance.  Unloader or cylinder head gasket 
replacement and resealing of the bottom cover plate are 
usually permitted under warranty.  Follow all standard safety 
procedures when performing any maintenance.

Look for:

Normal - Charging system is working within 
normal range.

Check - Charging system needs further 
investigation.

Bendix

®

 

BASIC

™ 

Test

WARNING! 

Please READ and follow these instructions to 

avoid personal injury or death:

When working on or around a vehicle, the following general 
precautions should be observed at all times.
1.  Park the vehicle on a level surface, apply the parking 

brakes, and always block the wheels.  Always wear safety 
glasses.  

2.  Stop the engine and remove ignition key when working 

under or around the vehicle.  When working in the engine 
compartment, the engine should be shut off and the ignition 
key should be removed.  Where circumstances require that 
the engine be in operation, EXTREME CAUTION should be 
used to prevent personal injury resulting from contact with 
moving, rotating, leaking, heated or electrically charged 
components.

3.  Do not attempt to install, remove, disassemble or 

assemble a component until you have read and thoroughly 
understand the recommended procedures.  Use only the 
proper tools and observe all precautions pertaining to use 
of those tools.

4.  If the work is being performed on the vehicle’s air brake 

system, or any auxiliary pressurized air systems, make 
certain to drain the air pressure from all reservoirs before 
beginning ANY work on the vehicle.  If the vehicle is 
equipped with a Bendix

®

 AD-IS

®

 air dryer system or a dryer 

reservoir module, be sure to drain the purge reservoir.

5.  Following the vehicle manufacturer’s recommended 

procedures, deactivate the electrical system in a manner 
that safely removes all electrical power from the vehicle.

6.  Never exceed manufacturer’s recommended pressures.  
7.  Never connect or disconnect a hose or line containing 

pressure; it may whip.  Never remove a component or 
plug unless you are certain all system pressure has been 
depleted.

8.  Use only genuine Bendix

®

 brand replacement parts, 

components and kits.  Replacement hardware, tubing, 
hose, fi ttings, etc.  must be of equivalent size, type and 
strength as original equipment and be designed specifi cally 
for such applications and systems.

9.  Components with stripped threads or damaged parts 

should be replaced rather than repaired.  Do not attempt 
repairs requiring machining or welding unless specifi cally 
stated and approved by the vehicle and component 
manufacturer.

10. Prior to returning the vehicle to service, make certain all 

components and systems are restored to their proper 
operating condition.

11. For vehicles with Automatic Traction Control (ATC), the ATC 

function must be disabled (ATC indicator lamp should be 
ON) prior to performing any vehicle maintenance where 
one or more wheels on a drive axle are lifted off the ground 
and moving.

Summary of Contents for 360CC

Page 1: ...ressor is cooled by air flow as well as by engine coolant The engine coolant first enters the crankcase water jacket to cool the cylinder bore then passes through passages in the valve plate assembly...

Page 2: ...ead center or TDC the vacuum created in the cylinder bore above the piston causes the inlet reed valve to flex open Atmospheric air flows through the open inlet valve and fills the cylinder bore above...

Page 3: ...a an oil passage in the crankshaft routes pressurized oil to the connecting rod bearings and the rear journal associated with the end cover Spray lubrication of the cylinder bore and connecting rod wr...

Page 4: ...for physical damage COMPRESSOR COOLING Inspect the compressor discharge port inlet cavity and discharge line for evidence of restrictions and carbon buildup If more than 1 16 of carbon is found thorou...

Page 5: ...Note When comparing build up times be sure to make an allowance for any air system modifications which would cause longer times such as adding air components or reservoirs Always check for air system...

Page 6: ...up and recovery times Compare current compressor build up times with the last several recorded times Make certain to test for air system leakage as described under In Service Operating Tests before ma...

Page 7: ...position on the compressor to aid in reassembly 5 Remove any supporting bracketing attached to the compressor and note their positions on the compressor to aid in reassembly 6 Remove the 6 mounting b...

Page 8: ...ve Kit K026809 Kit 2 Compressor Seal Kit Major K026807 Kit 3 Compressor Seal Kit Minor K051352 End Cover O ring Inlet Reed Valve Gasket Crankcase O ring Cover Item Qty Description 1 4 Head Cap Screws...

Page 9: ...any carbon deposits from the deck of the crankcase Make certain not to scratch or mar the gasket surfaces CYLINDER HEAD COOLING PLATE VALVE PLATE ASSEMBLY 1 Carefully remove all gasket material adheri...

Page 10: ...n the rear end cover 2 Orient the rear end cover 8 to the crankcase 11 using the reference marks made during disassembly Carefully install the rear end cover in the crankcase 11 making certain not to...

Page 11: ...essary 5 Install the discharge and coolant fittings if applicable in the same position on the compressor noted and marked during disassembly See the Torque Specifications for various fitting sizes and...

Page 12: ...12 Notes...

Page 13: ...surrounding area 3 0 A 5 In the supply reservoir 4 0 A 6 8 At the valves 5 0 A 8 At air dryer cartridge 7 0 A 9 In the ping tank or compressor discharge aftercooler 8 0 A 9 Symptom Page Number 1 Oil...

Page 14: ...ompressor frequent stops excessive leakage from fittings connections lines chambers or valves etc The discharge line allows the air water vapor and oil vapor mixture to cool between the compressor and...

Page 15: ...draulic brakes e g Line haul single trailer with air suspension RV school bus 5 or less 5 or less 8 or less 12 or less Table A Maintenance Schedule and Usage Guidelines Recom mended Every Month Max of...

Page 16: ...ON should be used to prevent personal injury resulting from contact with moving rotating leaking heated or electrically charged components 3 Do not attempt to install remove disassemble or assemble a...

Page 17: ...for the Bendix AD IS or AD IP air dryers or 5003838 for the Bendix AD 9 air dryer is available to redirect the air dryer exhaust 3 0 Oil at air dryer purge exhaust or surrounding area 2 0 Oil on the...

Page 18: ...within the acceptable level If within the normal range return the vehicle to service For vehicles with accessories that are sensitive to small amounts of oil consider a Bendix PuraGuard QC oil coales...

Page 19: ...let 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...

Page 20: ...nes tests all air brake system pneumatic components need to be able to pass including minimum levels of tolerance to contamination 5 0 Oil present at valves e g at exhaust or seen during servicing Air...

Page 21: ...ader mechanism malfunction e Damaged compressor head gasket Using dash gauges verify that the compressor builds air system pressure from 85 100 psi in 40 seconds or less with engine at full governed r...

Page 22: ...ine see Table A column 2 on page A 3 for recommended size and go to Test 3 on page A 14 By other restrictions e g kinks Replace the discharge line See Table A column 2 on page A 3 for recommended size...

Page 23: ...m and block the 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 deg...

Page 24: ...on page A 15 12 0 Air dryer safety valve releases air a Restriction between air dryer and reservoir b Air dryer safety valve malfunction c Air dryer maintenance not performed d Air dryer malfunction...

Page 25: ...ction such as a freeze up or carbon blockage and or could indicate a defective or missing safety valve Find blockage go to 9 0 f for details and then replace the compressor Do not re use the safety va...

Page 26: ...Test 2 Air Brake System and Accessory Leakage Caution The temperatures used in this test are not normal vehicle conditions Above normal temperatures can cause oil as vapor to pass through the air dry...

Page 27: ...or kinked Repair as necessary 2 Using a calibrated external gauge in the supply reservoir service reservoir or reservoir port of the D 2 governor verify cut in and cut out pressures are within vehicl...

Page 28: ...cian inspects items drained and f days Use Test 2 Air Leakage Use Test 2 Air Leakage NO Re test with the BASIC Test after 30 days NO did not know when last drained Was the number of days since last dr...

Page 29: ...gine oil loss amount described ______________ Is the engine leaking oil no yes Is the compressor leaking oil no yes Other complaint _____________________________________ No customer complaint Checklis...

Page 30: ...igh air use or 30 90 days low air use if oil level is at or below acceptance line for number of days if oil level is above acceptance line for number of days System OK Return to service Otherwise if t...

Page 31: ...required should occur as close as possible to the compressor Dryer Inlet Temperature The dryer inlet air temperature should typically be within the range of no more than 160 F and no less than 45 F a...

Page 32: ...udies indicate that using alcohol and alcohol based products sold for this purpose removes the lubrication from the components of the air braking system In addition the materials used for the internal...

Page 33: ...tallic parts of valves and melting or burning non metallic air lines WARNING THIS PRACTICE IS UNSAFE AND CAN RESULT IN VEHICLE FIRE 2 Do not introduce pour fluids into air brake lines or hose coupling...

Page 34: ...xle 5 Tractor and or trailer is equipped with air suspension Add 0 5 points Vocation Options Select the description that best fits 6 Vehicle is used as a city transit bus See Note 1 7 Vehicle is used...

Page 35: ...formation when sizing a Bendix compressor for the applicable vehicle vocation Testing should still be performed on the specific application to verify that the compressor remains within the 25 maximum...

Page 36: ...s Total 5 0 5 5 5 points Selection Bendix 360cc Air Compressors Example 3 Bulk Gravel Hauler A bulk gravel hauling vehicle Two 2 non steerable lift axles Truck equipped with air suspension Seven 7 axl...

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