ISBe/ISB Series Engines – Air Compressor Noise is Excessive Air Compressor Noise is Excessive

Carbon buildup is excessive in the air discharge line, downstream air valves, or cylinder head

Check for carbon buildup. Replace the air compressor discharge line and cylinder head assembly if necessary. Refer to Section 6
.

Air compressor is sending air pulses into the air tanks

Install a ping tank between the air dryer and the wet tank. Refer to the manufacturer’s instructions.

Ice buildup in the air system components

For all models, check for ice in low spots of the air discharge line, dryer inlet, and elbow fittings. On Holset® models, also check the Econ valve (if equipped). Refer to the OEM service manual.