E-Type System With Air Dryer
Vehicles equipped with air dryers vented to the atmo-
sphere during unloaded compressor operation, using the
Holset E-Type air compressor, require the installation of
an econ valve to prevent excessive oil consumption.
E-Type System Without Air Dryer
Air systems without air dryers, or with air dryers not
vented to the atmosphere during unloaded compressor
operation, can use the Holset E-Type unloader valve
without modifying the air system.
Section 4 - Compressed Air System Compressed Air System General Information
N14 Page 4-3
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