Newman Tractor LLC. 2600 W State Road 60 , Bartow , Florida 33830 USA About Solutions products Companies Newman Tractor LLC. Products MACK - Model CH613 - Tractor MACK - Model CH613 - Tractor 0 Share Hours: 5,390. Engine: e7-400 v-mac. Transmission: rtx14708ll, 10 speed fuller. Tandem rear axle: 44000lb-mack. Rear suspension: mack multy leaf. Tires: 11r24.5. Rear axle ratio: 4.35. Hours pictures taken: 5390. Customer reviews No reviews were found for MACK - Model CH613 - Tractor. Be the first to review! Add your review Publish your review Great! review successfully added!