Bendix-commercial-vehicle-systems BENDIX 720CC COMPRESSOR User Manual

PRODUCTThis Bendix® 720cc twin cylinder compressor is a “discharge line unloader” DLU-style compressor. The compressor pumps continuously, unlike som

10These items are also referenced in the following procedures and are denoted by the numbers in parenthesis. CYLINDER HEAD, COOLING PLATE & VALVE

11Repeat this process on the engine mounting face as well. Follow the instructions contained in the vehicle maintenance manual in lieu of the instruct

12CRANKCASE FRONT COVER1. Position the new cover (9) over the hole in the front of the crankcase. Using a rubber mallet, drive the cover into the hol

133. Install any supporting brackets on the compressor in the same position(s) noted and marked during removal. 4. Inspect all air and coolant

14Notes

A-1Appendix AAdvanced Troubleshooting Guide for Air Brake CompressorsAir brake charging system: Slow build (9.0) ...

A-2Introduction to the Air Brake Charging SystemPowered by the vehicle engine, the air compressor builds the air pressure for the air brake system. T

A-3Compressor with up to 25% duty cycleFootnotes: 1. With increased air demand the air dryer cartridge needs to be replaced more often.2. Use the d

A-4Air Brake Charging System Troubleshooting1.0 Oil Test Card ResultsNot a valid test.Discontinue using this test. Do not use this card test to diag

A-5Symptom: What it may indicate: What you should do:2.2 Oil leaking from compressor:(a) Excessive leak at head gasket. (b)Leak at bottom cover pl

2GENERAL SAFETY GUIDELINESWARNING! PLEASE READ AND FOLLOW THESE INSTRUCTIONSTO AVOID PERSONAL INJURY OR DEATH:When working on or around a vehicle, the

A-6Symptom: What it may indicate: What you should do: 4.0 Oil in Supply or Service Reservoir(air dryer installed)(If a maintained Bendix® PuraGuar

A-7Symptom: What it may indicate: What you should do: (e) Air compressor discharge and/or air dryer inlet temperature too high.(f) Insufcient coo

A-8Symptom: What it may indicate: What you should do: (i) Poorly filtered inlet air (poor air quality to compressor).(j) Governor malfunction or

A-9Symptom: What it may indicate: What you should do:8.0 Oil in ping tank or compressor discharge aftercooler.Air brake charging system is function

A-10Symptom: What it may indicate: What you should do: (g) Restricted air inlet (not enough air to compressor).Check compressor air inlet line fo

A-11Symptom: What it may indicate: What you should do: 10.0 Air charging system doesn’t build air. (a) Governor malfunction*. (b) Restricted disc

A-12Symptom: What it may indicate: What you should do: 15.0 Compressor constantly cycles (compressor remains unloaded for a very short time.)(a) A

A-13Symptom: What it may indicate: What you should do: This guide attempts to cover most com-pressor system problems. Here are some rare sources of

A-14TestsExterior leaks at the head gasket are not a sign that oil is being passed into the air charging system. Oil weepage at the head gasket does

A-151. Ensure that the governor control line from the reservoir is located at or near the top of the res-ervoir. (This line, if located near the bot

3are part of the valve plate assembly. The inlet reed valve/gasket is installed between the valve plate assembly and the top of the crankcase. The cas

A-16Drain contents of ALL air tanks into Bendix® Basic™ cupBendix® Air System Inspection Cup (BASIC™) Test InformationAppendix B: Information about t

A-17Footnote 1: Note: Typical air dryer cartridge replacement schedule is every 3 yrs/ 300K miles for low air use vehicles and every year/100K miles f

A-18Park the vehicle on level ground and chock wheels. Build system pressure to governor cut-out and allow the pressure to stabilize for one minute.

A-19Appendix CTechnical BulletinBulletin No: Effective Date: Cancels: Page: 1 of Subject:© 2010 Bendix Commercial Vehicle Systems LLC All rights r

A-20Appendix C: ContinuedBulletin No.: TCH-008-021 Effective Date: 3/5/2010 Page: 2 of 2System Leakage Check the air brake system for excess

A-21Technical Bulletin Bulletin No.: TCH-008-022 Effective Date: 1/1/1994 Page: 1 of 1Subject: Additional Cold Weather Operation Tips for

36Appendix EApplication Matrix for Bendix® 360cc Single Cylinder and 720cc Twin Cylinder Compressors for International Maxxforce® Big Bore EnginesThis

37Appendix ECompressorSelectionsPoint TotalsBendix® 360cc compressor Bendix® 720cc compressorPoints 2.5 3 4 5 6 6.5 7 8 9 9.5 10 11 12 13 14 15 16

38Appendix EExample #1: Typical Line Haul ApplicationA typical single axle, line haul vehicle:• Air suspension• Three (3) axles totalVehicle Congurat

39

4OPERATIONThe compressor is driven by the vehicle's engine, and functions continuously while the engine is in operation. Actual compression of ai

40BW2830 © 2014 Bendix Commercial Vehicle Systems LLC, a member of Knorr-Bremse Group • 9/2014 • All rights reserved.Printed on recycled paperLog-on a

5NON-COMPRESSION OF AIR (UNLOADED)COMPRESSOR AND AIR DRYER SYSTEM (REFER TO FIGURE 6)Air delivery to the vehicle’s air system is controlled either by

6LUBRICATION INSPECTIONThe compressor utilizes an internal oil feed design. Check the exterior of the compressor (e.g. around the mounting face) for t

73. Note that the charging system cycles to the loaded and unloaded conditions promptly. If prompt action is not noted, repair or replace the govern

8INLET & DISCHARGE VALVESIn order to test the inlet and discharge valves, it is necessary to have shop air pressure and an assortment of ttings

95End CoverCooling PlateCrankcase Alignment Pins (x2) - one at each endValve PlateAssemblyCylinder HeadCrankcaseCap Screws (x2)Crankcase Side CoverCra