2016 Mack Granite GU713 Tri Axle Dump Truck

The 2016 Mack Granite GU713 is a Class 8 construction truck that delivers 16–18 tons of legal payload capacity in a tri axle dump truck configuration. Built on Mack's Cornerstone chassis, designed for heavy-duty vocational applications, this unit handles aggregate, asphalt, fill dirt, and demolition debris across rough job sites and highway hauls alike. The GU713 typically features a Mack MP7 or MP8 engine, giving operators a choice between fuel-efficient mid-range power and peak torque for steep grades or maximum loads. With a gross vehicle weight rating of 75,500 lbs, the 2016 Mack Granite GU713 puts more material on every run while keeping axle loads within legal limits.

Why You'll Love It

• 16–18 tons of legal hauling capacity per load, with tri axle weight distribution that keeps each axle group within DOT limits across most states.

• Proven MP-series engine reliability. The MP7 and MP8 have been in Mack's lineup since 2007; spare parts (injectors, turbos, head gaskets) are available through the Mack dealer network. Maintenance costs for MP-series engines are predictable over time.

• Tri-axle stability on the job site. A steerable tag or pusher rear axle improves turning radius when backing into tight pours or navigating narrow access roads. The presence of a lift axle can enhance payload capacity and maneuverability.

• Durability under repetitive loads. Camelback suspension absorbs punishment on unpaved surfaces. The GU713 is known for its durability in vocational applications; units in Iowa have been serviced every 10,000 miles and remain in active fleets.

• Competitive operating costs. The MP7's "wave piston" design improved fuel burn by roughly 2–2.5% over prior MP7 versions. Oil and filter intervals run 45,000 miles in heavy-duty service, 60,000 in normal duty.

What Sets It Apart

The 2016 Mack GU713 competes with the Kenworth T800, Peterbilt 367, and Volvo VHD. Where those trucks offer similar horsepower ranges, the Mack separates itself in three areas.

First, the tri axle configuration vs. a tandem setup: three axles spread the load so operators can haul closer to state maximums (many states allow 60,000–70,000 lb for tri-axle vehicles with proper permits) without overloading any single axle group. A tandem axle dump truck typically tops out at lower legal payloads because the weight concentrates on two rear axle positions.

Second, the MP8 engine produces up to 505 horsepower and approximately 1,850 lb-ft of torque. The construction industry often requires trucks with high torque and low-end pulling ability; the MP8 delivers peak torque at low RPM, keeping the truck in gear on grades where competitors may require downshifts.

Third, the Granite's relatively short hood design offers good visibility for drivers working in congested job sites. The cab is built from galvanized steel for corrosion resistance, and a top-mounted axle carrier reduces driveline friction while increasing ground clearance for severe-duty driving.

Daily Operation

Before starting the engine, check oil, coolant, and transmission fluid levels. Walk the truck and inspect tires on all three axle positions, paying attention to tag axle alignment and steering clearance. Verify dump body hinges, air gate functionality, and tarp mechanism. A fresh federal DOT inspection sticker confirms brake, lighting, and safety compliance.

On the haul, load material evenly across the ft dump bed to prevent overloading one row of rear axles. The MP7 and MP8 both deliver maximum torque at lower RPM, so staying in the correct gear range matters more than revving high. The engine brake is commonly specified for high gross weights or hilly terrain; it reduces wear on service brakes during loaded descents. Transmission choice affects the workflow: a 13-speed Eaton Fuller speed manual transmission gives precise gear selection, while an Allison HD automatic transmission (such as the 4500RDS) simplifies stop-and-go site work.

At end of shift, dump remaining material, flush hydraulic lines if hauling wet or corrosive loads, and grease hinges and pivot joints. Check for coolant or oil leaks; the MP8 engine has documented cases of internal coolant loss due to cracked cylinder heads at high mileage. Chock wheels on any incline before leaving the unit.

Product Details

• Engine options: Mack MP7 (11-liter, 6-cylinder diesel; 345–425 HP; 1,200–1,560 lb-ft torque) or Mack MP8 (13-liter, 6-cylinder diesel; 415–505 HP; approximately 1,850 lb-ft torque)

• Transmission: Common manual transmission options include Eaton Fuller 10-speed and 13-speed. The truck is also available equipped with an Allison automatic transmission for simplified operation.

• Front axle: Rated 18,000–20,000 lbs

• Rear axle (tandem): Rated 44,000–46,000 lbs total

• Pusher/tag axle: Rated 10,000–20,000 lbs depending on specs

• Wheelbase: Typically ranges from 226 inches to 251 inches

• Dump body: 14–20 ft steel bodies; common body configurations range from 15 to 20 cubic yards. Ox Bodies and Hardox steel construction appear frequently. Air gate and electric tarp systems available.

• Suspension types: Mack camelback suspension (leaf-spring, severe duty) or Mack mRIDE (air ride for smoother highway operation)

• Emissions system: The 2016 MP8 includes EGR, DPF, and SCR components

• Cab features: Power windows, power mirrors, air ride driver seat, heater/AC, differential lock, engine brake

• GVWR: 75,500 lbs

Who It's For

• Construction contractors hauling aggregate, sand, asphalt base, and fill dirt between sites. The 16 ft steel dump bed handles most common load volumes.

• Small to medium fleet owners who need a dump truck that runs reliably on 45,000-mile service intervals without specialized tooling.

• Owner-operators looking for proven vocational performance and strong resale values. Units with low mileage sell for higher prices; condition and service history affect pricing by thousands of dollars.

• Companies that need more capacity than a tandem but want to avoid the added cost and complexity of a quad-axle configuration. The tri axle setup provides the middle ground: more payload, better weight distribution, and a tighter turning radius with a steerable tag axle.

Frequently Asked Questions

What's the difference between MP7 and MP8 engines for dump work? The MP7 offers 345–425 Mack horsepower in a lighter 11-liter package, which reduces tare weight and improves fuel economy on lighter loads. The MP8 provides 415–505 horsepower and approximately 1,850 lb-ft of torque from its 13-liter block, needed for steep grades or consistently maxed-out payloads. Fuel and maintenance costs are higher for the MP8 due to the larger displacement and additional cooling demands.

How much payload can this truck legally carry? The 2016 Mack Granite GU713 has a payload capacity of 16–18 tons. The exact number depends on local weight laws and the truck's tare weight (cab, body, and installed equipment). With a 75,500 lb GVWR and an empty weight of roughly 25,000–30,000 lbs, legal payload falls between 35,000 and 40,000 lbs in most states.

What should I inspect before purchasing a used 2016 model? Inspecting the engine, transmission, and suspension before purchasing is important. Request fault code history before purchasing a used GU713. On MP8 units with 250,000+ miles, check for exhaust valve damage and cracked cylinder heads; symptoms include misfires on cylinders 5 or 6 and coolant loss without visible external leaks. Verify overhead valve adjustments were performed at 150,000 miles and every 300,000 miles after. The primary reliability risk is the emissions system components (EGR, DPF, SCR).

What's the current market value? 2016 Mack Granite GU713 prices range from $60,000 to $110,000. Market value varies based on specifications and mileage. Price and mileage correlate directly: a unit listed at $97,500 with 467,526 miles reflects typical depreciation, while lower-hour MP8 455 HP units command $110,000+. The scrap value of used trucks like the Mack Granite GU713 can be affected by market conditions. Financing available through many dealers makes acquisition accessible for owner-operators.

Are there common issues with the 2016 emissions system? The EGR valve, DPF filter, and SCR catalyst all require periodic service. DPF regeneration cycles add idle time and fuel consumption. Some operators report derating events tied to faulty NOx sensors or DEF quality issues. These are serviceable items, not structural flaws, but budget for sensor replacements at 200,000+ miles.

Next Steps for Buyers

The 2016 Mack GU713 tri axle dump truck offers 16–18 tons of payload capacity, a choice between MP7 and MP8 power, and a Cornerstone chassis built to absorb years of heavy vocational use. Used units are available for sale across multiple regions, and the truck holds value well when serviced on schedule.

Before committing, request the full maintenance history and fault code records. Verify that overhead adjustments, injector service, and emissions system maintenance are documented. A pre-purchase inspection by a Mack-certified technician covers the engine, transmission, suspension, and dump body hydraulics; this step alone can prevent a $10,000+ repair surprise on an MP8 head replacement. Prioritize units that have been consistently serviced and carry current DOT inspection status.