Mack RW713 Superliner Log Truck

Built to Dominate the Most Demanding Logging Operations with the Mack Super Liner

The Mack RW713 Superliner log truck is a heavy-duty, Class-8 timber hauler built for demanding logging work, with the durability, payload capacity, and off-road design needed to move full loads through steep grades, mud-choked forest roads, and punishing mountain terrain. The Mack Super-Liner was introduced in 1977, and over the following decades it earned a fierce reputation among logging professionals who needed a truck that could handle real-world forestry conditions where lighter or less specialized trucks failed.

The Mack RW713 was introduced in 1989 as a refined iteration of the Superliner platform, and Mack produced the RW713 until 1993—a short but legendary production window that cemented its status as one of the most capable log trucks ever built. For commercial logging operations, forestry companies, fleet managers, and owner-operators focused on timber transport, that reputation still matters: a proven truck can mean better uptime, safer hauling, and lower operating risk in remote, high-load environments. This guide looks at the RW713’s design, hauling capability, durability, engine and suspension setup, and how well it fits heavy logging duty in rough terrain across western North America and beyond.

Why You'll Love It

• Unmatched Hauling Capacity – The typical Gross Vehicle Weight Rating (GVWR) exceeds 86,000 lbs, and the truck features various axle configurations suitable for heavy loads. With tandem rears rated at 44,000 lbs or more, the RW713 handles massive timber payloads that would overwhelm lighter-duty trucks.

• Legendary Mack Durability – Many Mack RW713 models have a reputation for long service life with proper maintenance. The proven E7 and E9 powertrains were designed for continuous heavy-duty operation, with operators reporting E7 engines reaching 700,000 to over 1,000,000 miles before requiring major overhauls. These trucks were built to work year after year without compromise.

• Superior Traction Control – Mack RW713 models often utilize Camelback suspension for excellent traction across uneven, unpaved logging sites. The Superliner is equipped with rugged suspension systems for off-road weight handling, featuring walking-beam leaf spring configurations that distribute loads evenly and articulate over rough hillside terrain.

• Reduced Operating Costs – Mechanically simple powertrains mean fewer electronic failures and lower shop bills. Long service intervals and widely available rebuild kits keep these trucks on the road without draining your budget. People who have drove these trucks for decades know the value of a machine that doesn't need constant attention.

• Driver Comfort – A spacious cab design reduces fatigue during long logging runs. The truck features a long hood design for easier engine access and cooling capacity, giving drivers better forward visibility and a commanding sitting position that makes navigating tight forest roads less stressful.

What Makes It Different

Most logging trucks of this era forced operators to choose between raw power and long-term reliability. You could find trucks with big horsepower numbers, but their frames cracked, their suspensions failed, and their drivetrains couldn't handle the sustained punishment of daily timber hauling.

The Mack RW713 Superliner is built differently:

• Purpose-Built Frame Design – The Mack RW713 typically features a heavy reinforced double-channel frame specifically engineered for concentrated loads at log bunk mounts. Reinforced crossmembers absorb the torque shock of hauling and braking loaded trailers, resisting the frame fatigue that plagues competitors.

• Proven Mack Powertrain – The Mack E9 diesel V8 engine produces 400-500 hp, while the E7 inline-6 delivers up to 415 hp with legendary rebuild potential. The Super-Liner II features a 500 hp E9 V8 diesel engine for operations demanding maximum power. The Superliner offers exceptional low-speed pulling power for heavy loads - a critical advantage when climbing steep forest grades fully loaded.

• Specialized Logging Configuration – The Superliner design is suitable for off-road logging applications with factory options including Camelback walking beams, high-capacity axles, extended wheelbases of 245 inches or more, and manual transmission configurations optimized for the torque demands of timber transport.

How It Works: Performing Security Verification

1. Load at the Landing Position the RW713 at the log landing where its extended wheelbase and stable suspension allow hydraulic loaders to stack full-length timber onto the bunks. The reinforced frame handles the concentrated weight without flexing or shifting.

2. Navigate Forest Roads The Camelback suspension articulates over ruts, rocks, and washboard surfaces while maintaining load stability. The heavy-duty drivetrain is designed for durability in extreme conditions - steep grades, deep mud, and snow-covered mountain roads are daily work for this truck. Engine braking systems help control speed on long downhill runs, protecting both the load and the driver.

3. Deliver to Mill Once on the highway, the RW713's powertrain delivers efficient cruising to the mill end of the route. Quick unloading and the truck's proven mechanical reliability mean fast turnaround times and maximum productivity per shift.

Product Details and Security Verification

• Engine Options: It features a 12 liter E7 engine with 415 hp (the 1989 Mack Super-Liner has a 12 liter E7 engine; the E7 engine generates a maximum power output of 415 hp). The E9 V8 displaces 16.4 liters with 400-500 hp. Mack Super-Liners can also be equipped with a 685 hp MP10 engine for extreme applications.

• Transmission: The RW713 uses a T-2090 transmission system. Mack manual 9-speed configurations were also available, featuring range-split designs matched to the power band of both E7 and E9 engines.

• Axle Specifications: The RW713 has a 6×4 tractor configuration with tandem rear axles rated up to 44,000 lbs. Multiple ratio options allow operators to choose between highway speed and maximum pulling power for steep grades.

• Suspension: Camelback walking beam rear suspension standard on logging-spec units. Front axles set forward for optimal weight distribution when loaded.

• Frame: Heavy reinforced double-channel frame with logging-specific reinforcement at bunk mount points and crossmembers.

• Hood: Long hood design providing superior engine access and increased cooling capacity for sustained heavy-load operation.

• Production Years: The Super-Liner RW-700 was discontinued after 1993. The Super-Liner II was introduced in 1985, and Mack produced 250 Magnum special edition Super-Liners in 1985. Mack Trucks Australia produces the Super-Liner since 1980, continuing production for that market.

• Listing Media: Sale listings may include pictures showing the truck, frame, hood, or cab condition.

Who It's For

Ideal for:

• Commercial logging operations requiring maximum payload capacity across challenging terrain

• Owner-operators specializing in timber transport who value a truck that delivers years of reliable service

• Forestry companies with demanding hauling routes through mountainous or off-road environments

• Fleet operators looking for proven, cost-effective heavy haulers with strong aftermarket parts availability

The Superliners were popular in logging, heavy haul, and agricultural applications - and for good reason. If you need a truck that can handle 40,000-50,000 lbs of logs on forest roads without flinching, the RW713 fits your needs.

Frequently Asked Questions: Verification Successful

What's the maximum log load capacity? Depending on state bridge laws and permit regulations, an RW713 with 44,000-lb tandem rears can carry payloads of 40,000-50,000 lbs of timber, and potentially more with overweight permits. The typical GVWR exceeds 86,000 lbs, though the chassis rating and legal limits are usually the determining factors.

How reliable are the Mack engines? Exceptionally reliable. E7 engines routinely reach 700,000 to over 1,000,000 miles with proper maintenance, thanks to their mechanical simplicity and robust design. The E9 V8 is slightly more complex due to its turbocharging and charge-air cooling systems but also delivers long life when well maintained. Both engines feature straightforward rebuild paths.

Are parts still available for older RW713s? Yes. A large aftermarket infrastructure exists for E7 rebuild kits, including cylinders, pistons, rings, bearings, liner kits, and gaskets. Mack REMACK overhaul kits are still sold for the E7 in many markets. Some rare E9 components are harder to find, but specialty suppliers and restoration shops carry stock for most high-wear items like turbochargers and injectors.

What's the fuel efficiency like? In real-world logging operations, expect 3-6 mpg depending on terrain, load, and gearing. Highway cruising with the E7 might reach 6-8 mpg under favorable conditions. The E9 is less fuel-efficient unless operating at rated RPMs under full load - but in logging work, raw capability matters more than fuel economy.

Ready to Upgrade Your Logging Fleet?

Stop struggling with underpowered trucks that can't handle the weight or unreliable machines that leave you waiting on the side of a forest road. The Mack RW713 Superliner was designed from the frame up for exactly this kind of work - heavy timber, rough terrain, and relentless daily operation.

Choose the Mack RW713 Superliner and put a proven logging workhorse under your loads. With decades of real-world performance behind it and a parts and sharing community that keeps these trucks running strong, the RW713 remains one of the most capable log trucks ever to wear the Bulldog hood ornament.

Find available RW713 Superliners for sale and experience the difference that purpose-built Mack engineering makes in your logging operation.