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6.7L Cummins Engine Assembly – Air Compressor Discharge Lines

General Information
The air discharge line is supplied and connected directly to the engine’s air compressor by the vehicles OEM.
For some applications, a noise reduction tank or “ping” tank has been installed on the engine to reduce air
compressor pumping noise. If the engine is equipped with a “ping” tank, the OEM would connect the air discharge
line to the “ping” tank and not directly to the air compressor.
The procedure covers the removal and installation of the noise reduction tank or “ping” tank and related components only.

Install
Install the “ping” tank.
Install the three “ping” tank to fuel filter bracket mounting capscrews.
Tighten and mounting capscrews.
Torque Value: 24 N•m [ 212 in-lb]

NOTE: Apply a counter-torque to the air compressor discharge fitting when tightening the discharge line.
Install the air compressor to “ping” tank discharge line.
Connect the air compressor discharge line between the air compressor and the “ping” tank.
Tighten the air compressor discharge line fittings.