MOTTROL USA EXCAVATOR PARTS DEPOT. YOUR BEST SOURCE FOR OEM QUALITY EXCAVATOR PARTS.For the parts described with both part number and application machine model or engine model, please make sure to order according to the part number, the application machine model or engine model is just for reference. The item "124-1670, REPLACE COUPLING FITS CATERPILLAR 311D, 312D, 315D, 320, 320B, 320C" is in sale since Monday, July 17, 2017. This item is in the category "Business & Industrial\Heavy Equipment, Parts & Attachments\Heavy Equipment Parts & Accessories\Valves". The seller is "mottrolusa" and is located in Rancho Cucamonga, California. This item can be shipped to United States.