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© 2018 WABCO North America – All rights reserved – MM31 / 08.2018

connects trucks, trailers, cargo, 
drivers, business partners and 
fl eet operators through advanced 
fl eet management systems and 
mobile solutions. WABCO re-
ported sales of $2.8 billion in 
2016. Headquartered in Brussels, 
Belgium, WABCO has 13,000 em-
ployees in 40 countries. For more 
information, visit:

www.wabco-na.com

 (NYSE: WBC) is a 

leading global supplier of technol-
ogies and services that improve 
the safety, effi ciency and con-
nectivity of commercial vehicles. 
Founded nearly 150 years ago, 
WABCO continues to pioneer 
breakthrough innovations for ad-
vanced driver assistance, brak-
ing, stability control, suspension, 
transmission automation and 
aerodynamics. Partnering with 
the transportation industry as it 
maps a route toward autonomous 
driving, WABCO also uniquely 

Summary of Contents for System Saver 318

Page 1: ...NON THROUGH DRIVE THROUGH DRIVE SYSTEM SAVER 318 AIR COMPRESSOR FOR MACK E TECH AND ASET ENGINES MAINTENANCE MANUAL...

Page 2: ...Follow your company s maintenance and service installation and diagnostics guidelines 4 Use special tools when required to help avoid serious personal injury and damage to components Hazard Alert Mes...

Page 3: ...2 Operation Maintenance Intervals Cylinder Head 3 Visual Inspection 4 Section 2 Troubleshooting 7 Section 3 Compressor Replacement Compressor Replacement Information Removal 8 Installation Cylinder He...

Page 4: ...Notes...

Page 5: ...ing above 250 psi in the event of a blocked discharge line or other malfunction Figure 1 1 Description The WABCO System Saver 318 air compressor provides and maintains air under pressure to operate de...

Page 6: ...valve to open 3 Unloading Air passes from the cylinder to the inlet chamber of the cylinder head via a port controlled by a sliding leaf valve When system cut in pressure is reached air is exhausted f...

Page 7: ...maintenance program Figure 1 5 Figure 1 5 Figure 1 5 1003376b Check air inlet and discharge ports between compressor and governor Check under plate or at power steering pump for leakage Check water p...

Page 8: ...urer s oil and filter maintenance schedules are followed Restricted air inlet or excessive vacuum present at compressor inlet Verify engine or compressor air cleaner is functioning correctly Replace i...

Page 9: ...Refer to air dryer manufacturer s service instructions Chafed or worn discharge line Replace faulty sections of discharge line Loose or leaking air line connections Verify all connections are secure T...

Page 10: ...orn or damaged unloader piston O ring porosity in unloader piston bore loose or leaking seal at unloader piston bore Replace compressor cylinder head assembly Compressor head gasket failure Discharge...

Page 11: ...The front of the WABCO System Saver 318 air compressor is mounted to the engine Before you remove the compressor make sure you have a replacement gasket to install with the new compressor Mack part nu...

Page 12: ...al to verify that the installation is to the correct specifications 8 Add engine coolant to the cooling system Use the coolant recommended by the engine manufacturer Visually inspect the engine and co...

Page 13: ...leaf The two holes in the sliding leaf must be installed over the two pins on the base of the cylinder head Figure 3 6 Figure 3 6 3 Position the inlet valve on the bottom of the cylinder head Align t...

Page 14: ...sor does not reach governor cutout pressure check for air leaks in the system If reservoir volume and engine RPM are per original vehicle manufacturer s specifications system plumbing leakage must be...

Page 15: ...in 40 countries For more information visit www wabco na com NYSE WBC is a leading global supplier of technol ogies and services that improve the safety efficiency and con nectivity of commercial vehi...

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