STRUCTURE, FUNCTION, & MAINTENANCE STANDARD TRACK FRAME • RECOIL SPRING 12 TRACK FRAME • RECOIL SPRING 1 Idler 2 Track frame 3 Carrier roller 4 Final drive 5 Track roller 6 Track shoe 7 Center guard 8 Recoil spring The dimensions and the number of track rollers depend on the model, but the basic structure is not different. Number of track rollers Model Q’ty PC210-7K 7 PC210LC-7K 9 PC210NLC-7K 9 PC240LC-7K 10 PC240NLC-7K 9 10-14 PC210/240-7K