540G - SKIDDER, LOG 3840 Frames Parts group 3840 Frames 3840 Frames . Single Function Arch (548G Grapple Skidder) Single Function Arch (648G and 748G Grapple Skidder) Dual Function Arch (648G and 748G Grapple Skidder) (With Winch Option) Dual Function Arch (648G and 748G Grapple Skidder) (w/o Winch Option) Dual Function Grapple Boom (648G and 748G) Boom And Rotate Service Kit Grate (Single and Dual Function Arch) Cable Rollers (Single Function) Cable Rollers (Dual Function) Grapple Cross Head Dampers and Pins (548G) Grapple Cross Head Dampers and Pins (648G and 748G) GRAPPLE ROTATE PARTS