Western Star Blazes New Territory

Western Star brings its hand-built truck-making ethos to a new niche, aiming its 110-in.-BBC 4700 vocational truck at the Class 7 and 8 end of the market. The first light-Class-8 Western Star offers so many powertrain options on a chassis with up to 55-degrees of wheel cut that, with the maker's durability reputation, it will be powerfully attractive among premium dump, mixer, crane, roll-off, sewer vac, plow and other demanding vocational users. 

Available in set-forward and set-back axle configurations, the 4700 offers an array of powertrain choices uncommon to the era of emissions-compliance costs and diminishing option lists. Customers who don't need 13 liters of power can exchange the Detroit Diesel DD13 – in ratings from 350 to 450 hp and 1,250 to 1,650 lbs.-ft. of torque – for the Cummins ISC or ISL. The ISC makes 260 to 350 hp and the ISL is rated at 345 to 380 hp, the offerings spanning a torque range from 1,000 to 1,300 lbs.-ft. of torque. A range of transmissions is also available, including the latest Eaton Ultrashift PLUS, and Allison 3000 and 4000-series transmissions.

Western Star parent, Daimler Trucks, clearly did not hurry to issue the 4700 to backfill a gap in its truck offering after shuttering Sterling. Western Star DNA is evident in the 4700's design for durability with an eye to controlling weight. Half-inch thick single-channel frame rails are rated at 3.2 million RBM. Western Star custom drills them for each customer's application, preserving strength. Because they aren't stacked, there are fewer footholds for corrosion.

And the Truck is up-fitter friendly. The 4700 features standard specs such as clean back of cab, in-cab batteries for clear frame rails, and front frame extensions.The body builder interface connector and transmission control unit is placed in the cab and out of the elements. There is a bolt-in pass-through plate in the cab floor to eliminate unnecessary drilling, and a unique dedicated Body Builder Wiring Raceway that provides plenty of room for body builders to route wiring more efficiently. The truck also features point-to-point wiring – ideal for field serviceability in remote locations. An add-on multiplex option is also available.

Rail space on vocational trucks is always a premium. That is why the in-cab batteries free 17 to 34 inches of rail space for body equipment installation, and the 4700’s DEF and air tanks can be placed under the cab to free up additional rail space.

The routing and clipping of air and electrical lines down the chassis are suspended away from the frame rails to reduce the chance that the lines will rub against the rail – creating issues that can result in downtime. By suspending these away from the rail, road debris can pass behind, rather than build up on the bundle, ultimately decreasing abrasion.

The 4700's galvannealed steel cab is built to withstand vocational rigors. It is precision welded, then dipped and protected with a proprietary 17-stage e-coat finish for long-lasting corrosion resistance and superior paint finish.

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