1994, MACK DM690S ROLL-OFF TRUCK, 215666 Km, 23900 Canadian Dollars.MACK DM690S TRUCK: 1994 Mack DM690S Roll Off Truck for Sale! Mack EM7-300 Engine, 300 HP. Maxitorque T-2070 Transmission. Inside Controls. Tandem Axle. Budd Rims. Front Tires: 315/80R22.5 / 90%. Rear Tires: 315/80R22.5 / 80%. Camelback Suspension. Mountain Tarp System. G & H 60,000 lb Hoist. Outside Rails.