Featured Item View 5 Photos View 0 Videos 2016 Caterpillar 559 Knuckleboom Loader - Rotobec 5052 Grapple Bucket Newly Listed $135,000 USD 2016 559 Tier 3 CAT Knuckleboom Loader with Rotobec 5052 Grapple. Mounted on 1988 R-Model Mack. 2017 ProPac Slasher 600-500 s/n #3687. Both loader and truck have engine preheaters. All in... ConditionUsedUsage11,777 HoursAttachment TypeGrapple BucketAttachment MakeRotobecAttachment Model5052Emission RatingTier 3Enclosed CabYes MLS Number14411877CategoryKnuckleboom Loaders Last Updated6/8/2026 LocationStewartsown, NH, US Sold ByPrivate Party (603) 443-___ SHOWNUMBERCall Seller Email Seller Save More Info