Changing our air compressor

[clmajak]

Anyone ever changed out the air compressor on the Cummins to a larger twin cylinder? This is on my M916. The application we intend to use this for could use more CFM.

 

[Suprman]

Can you run an auxilliary electric one I have seen some really nice 24v mobile compressors.

 

[simp5782]

I will bump this with some information.

Twin cylinders are a pain and require some modifications.

Stock compressor puts out 13.2cfm on the SS296. Cost is around $300 - $400 for a new unit. (Part # 3018543X)

A Wabco Unit for the Cummins L/K/N engines is rated for 18.2cfm and is around $600-$800 for a new unit. So it is some more air for you. ( part #s 9111535200X and 9111535207X

I have only seen 1 or 2 of the Bendix Tru Flo 500 twin compressors for the 855s.

Haldex info : https://www.haldex.com/globalassets/north-america/documents/compressors/l00118.pdf

 

[WillWagner]

Cummins actually offers a 30 cfm unit, ST676 Holset compressor. When installed, the engine will need different fuel lines from the pump to the heads and return lines as well as the coolant plumbing and discharge plumbing, that goes from 1/2 inch to a #16 hose, any smaller and it restricts the flow and causes compressor premature failures. You will NEED to install the big azz support bracket or the accessory drive and gear cover will fail. I have rebuilt many of these, the work well as long as the are used for their intended purpose and not for just running brake systems. If not used heavily, they turn into giant oil pumps.

https://www.haldex.com/en/na/compre...factured/cumminsholset-model-st676-/3048680x/

 

[simp5782]

Cummins actually offers a 30 cfm unit, ST676 Holset compressor. When installed, the engine will need different fuel lines from the pump to the heads and return lines as well as the coolant plumbing and discharge plumbing, that goes from 1/2 inch to a #16 hose, any smaller and it restricts the flow and causes compressor premature failures. You will NEED to install the big azz support bracket or the accessory drive and gear cover will fail. I have rebuilt many of these, the work well as long as the are used for their intended purpose and not for just running brake systems. If not used heavily, they turn into giant oil pumps.

https://www.haldex.com/en/na/compre...factured/cumminsholset-model-st676-/3048680x/

And for the price might as well opt for a whole motor!