Air Brake Compressor R23522122 R23522123 For Detroit Diesel Series60 12.7 TF-750. Part Name: Air Brake Compressor. 109425, 109426, 109430, 109429. 23522123, R23522122, 23522122, R23522123. For Freightliner 2004 and older 12.7 engine. Most common air compressor on Detroit Series 60 12.7 (PRE EGR) 2004 and older models. This listing is for TF-750 Series 60 Detroit Compressor. It is same as TU-FLO-550 just 750 is producing more air more CFM. Please check the pictures & descriptions in the link for more details. More quantity, please contact our customer service. Please double check that it is suitable for your machine before purchasing; if you are not 100% sure, please contact our customer service and we will try our best to assist! All these transport timeliness Don’t apply to remote districts. Please make sure it is correct. We will do our best to offer you satisfied resolutions.