Description:Swing drives such as 11R-1781 provide gear reduction between swing motor and swing gear, and a method of holding upper portion of machine stationary in respect to lower portion (chassis) of the machine.Attributes:• Cat Reman NWC offerings contain 100% new Cat parts at a reduced price in exchange for an acceptable core.• Cat Reman NWC swing drives offer the productivity and efficiency of new ECMs for less than the cost of new with an acceptable core return.• Cat Reman NWC swing drives come with a same-as-new Caterpillar Limited Warranty. 1• Cat Reman offers off-the-shelf availability. 21 Warranty can vary by model and application; limitations may apply. For complete details about the applicable Caterpillar Limited Warranty, contact an authorized Cat dealer.2 Part may not be available off-the-shelf at all times and in all locations.