The Western Star 4700 represents a significant addition to the Class 8 vocational truck market, targeting construction and municipal operators who require robust performance, exceptional durability, and practical design. Introduced at the 2011 Work Truck Show, this model complements the existing Western Star 4900 and 6900 series to offer a complete range of premium truck options. Available in both set-forward and set-back axle configurations with a 110-inch BBC (bumper-to-back-of-cab) measurement, the 4700 delivers what is currently the shortest BBC in its class. This compact front-end design makes the truck particularly well suited for demanding applications such as dump trucks, concrete mixers, cranes, roll-off containers, sewer vac units, and snow plows. For vocational truck builders evaluating modern fleet options, the Western Star 5700xe How an Aerodynamic Class 8 offers a useful comparison of how different cab configurations serve varying operational needs.
Powertrain Options and Performance Capabilities
The Western Star 4700 offers one of the broadest ranges of powertrain options available in a single vocational truck model. Operators can choose between Detroit Diesel and Cummins powerplants, each paired with appropriate transmission systems to match specific job requirements.
Detroit Diesel DD13 Engine
The DD13 is a six-cylinder in-line diesel engine producing 350 to 450 horsepower with torque ratings from 1,250 to 1,650 lb-ft. This powerplant incorporates Daimler’s BlueTec Selective Catalytic Reduction (SCR) emissions technology alongside the Amplified Common Rail System (ACRS). The combination delivers fuel economy improvements of up to five percent compared to previous-generation engines, a meaningful advantage for fleets logging significant annual mileage in vocational service.
Key specifications of the DD13 include:
- Displacement: 12.8 liters
- Configuration: inline six-cylinder
- Horsepower range: 350 to 450 hp
- Torque range: 1,250 to 1,650 lb-ft
- Emissions system: BlueTec SCR with ACRS
- Fuel economy improvement: up to 5 percent
Cummins ISC and ISL Engine Options
For vocational applications that do not require the full 13-liter displacement, the Cummins ISC and ISL engines provide capable alternatives. These powerplants are well matched to light plow and mixer operations where lower weight and adequate power density are priorities over maximum torque output.
| Specification | Cummins ISC | Cummins ISL |
|---|---|---|
| Horsepower range | 260 to 350 hp | 345 to 380 hp |
| Torque output | 1,000 lb-ft | 1,100 to 1,300 lb-ft |
| Emissions technology | SCR | SCR |
| Typical applications | Light plow, municipal | Mixer, medium-duty vocational |
| Displacement class | 8.3 liters | 8.9 liters |
Transmission Choices
The 4700 accommodates a wide selection of transmission options to match engine output with operational demands. The Eaton Ultrashift PLUS automated manual transmission delivers smooth shifting and reduced driver fatigue in stop-and-go vocational environments. For applications requiring torque converter benefits, the Allison 3000 and 4000 series fully automatic transmissions are available, providing seamless power delivery during mixer and heavy-haul operations.
When selecting a transmission for vocational service, operators should consider these factors:
- Application duty cycle: frequent stopping and starting favors automatic transmissions
- Operator skill availability: automated manuals reduce training requirements
- Fuel economy targets: automated and automatic options optimize shift timing
- PTO requirements: transmission-mounted PTO compatibility varies by model
- Weight considerations: transmission weight impacts payload capacity
Cab Design and Operator Safety Features
Western Star engineers placed significant emphasis on cab construction, visibility, and occupant protection when developing the 4700. The result is a workspace designed to withstand the rigors of vocational applications while keeping the driver comfortable and safe throughout long workdays.
Galvannealed Steel Cab Construction
The cab is constructed from galvannealed steel, a material that combines the strength of steel with enhanced corrosion resistance through a zinc-iron alloy coating. Precision welding ensures structural integrity, and the entire cab assembly undergoes a proprietary 17-stage e-coat immersion process. This electrodeposition coating delivers long-lasting corrosion resistance and a superior paint finish that withstands the abrasive environments typical of construction and municipal sites. The structural robustness of the 4700 cab aligns with principles discussed in Key Aspects of Athens Acropolis Geotechnical Features of, where foundational integrity determines long-term performance under demanding conditions.
Visibility and Maneuverability
The newly designed sloped hood of the 4700 provides outstanding sight lines, giving the driver a clear view of the road surface immediately ahead. This is particularly valuable when operating on congested construction sites or navigating tight urban streets. The short 110-inch BBC measurement, combined with a 55-degree wheel cut, produces exceptional maneuverability. Drivers can negotiate narrow job site corridors, confined loading areas, and sharp urban intersections with greater confidence than competing trucks with longer front-end dimensions.
Interior Comfort and Functionality
The 72-inch wide cab provides generous interior space for the driver. Western Star updated the interior materials for easier cleaning, a practical consideration for vocational trucks that accumulate dust, mud, and debris. Lighter headliner colors brighten the cabin and reduce the closed-in feeling during extended operating hours. Customizable marine-grade switches resist moisture and corrosion, while the hinged dash design with exposed fasteners simplifies service access. The redesigned door maximizes storage capacity and improves entry and egress through optimized door opening dimensions and step placement.
Body Builder Integration and Chassis Engineering
Vocational trucks spend much of their working life with specialized bodies and equipment mounted to the chassis. The Western Star 4700 incorporates multiple features specifically designed to simplify body installation, reduce upfitting time, and improve long-term reliability of the electrical and pneumatic systems that interface with attached equipment. These engineering decisions reflect construction best practices comparable to the Code Check Western Building Guidelines that govern structural integration in building construction.
Dedicated Body Builder Wiring Raceway
An industry-first innovation on the 4700 is the dedicated Body Builder Wiring Raceway, an easily accessible routing path through the cab floor that provides ample space for body builders to route wiring efficiently. This eliminates the need for body installers to drill holes or improvise routing paths that could compromise the cab floor integrity or create pinch points for wiring harnesses. The body builder interface connectors and transmission control unit are positioned inside the cab, offering greater protection against the harsh and corrosive environments typical of construction and municipal operations. This placement prevents wiring shorts and associated downtime by keeping sensitive connections away from road spray, salt, and debris.
- Bolt-in pass-through plate in the cab floor eliminates unnecessary drilling
- Dedicated Wiring Raceway provides organized routing paths
- In-cab transmission control unit protects against corrosion
- Point-to-point wiring simplifies field serviceability in remote locations
- Add-on multiplex option available for advanced electrical management
Frame Design and Packaging Solutions
The 4700 features a half-inch, 3.2 million RBM (resistance bending moment) single channel frame rail option that reduces weight while maximizing payload capacity. This frame is particularly beneficial for operators working in corrosive environments where frame durability is critical. The single channel rail is custom punched to eliminate unnecessary holes that could concentrate stress and reduce frame strength. In-cab battery placement frees 17 to 34 inches of rail space for body equipment installation. Diesel exhaust fluid (DEF) tanks and air tanks can be positioned under the cab to free additional rail space for body mounting. Air and electrical lines running down the chassis are suspended away from the frame rails to prevent abrasion and allow road debris to pass behind the bundle rather than accumulating and causing wear.
Serviceability and Maintenance Access
The 4700 was engineered to maximize uptime and profitability through thoughtful service access design. The standard stationary grille combined with optional hood engine access allows technicians to reach engine components without removing body equipment. Rear engine PTO access panels provide additional service points. Key serviceability features include:
- Stationary grille design for engine bay access without body removal
- Optional hood engine access panels for daily inspection points
- Rear engine PTO access panels for transmission and PTO maintenance
- Hinged dash with exposed fasteners for instrument panel service
- Daimler one-box aftertreatment system for simplified emissions maintenance
Vocational Applications and Market Positioning
The Western Star 4700 fills a specific niche in the vocational truck market, serving operators who need a premium truck with the right balance of capability, cost, and customization options. Its positioning between the heavy-duty 6900 and the highway-focused 4900 gives fleet managers a versatile tool for diverse construction and municipal work.
| Application | Recommended Configuration | Key Advantage |
|---|---|---|
| Dump truck | Set-back axle, DD13 engine | Weight distribution, maneuverability |
| Concrete mixer | Set-forward axle, Cummins ISL | Front axle capacity, drum clearance |
| Crane service | Set-back axle, heavy-duty frame | Stability, PTO access |
| Roll-off container | Set-back axle, DD13 or ISL | Short BBC for container clearance |
| Sewer vacuum | Set-back axle, in-cab batteries | Clean frame rails for body mount |
| Snow plow | Set-forward axle, Cummins ISC | Front weight capacity, visibility |
The 4700’s clean back-of-cab design, enabled by Daimler Trucks EPA 2010 one-box aftertreatment system, gives the 4700 a competitive advantage over trucks using two-box systems that intrude on body mounting space. This single-box layout, combined with under-cab component packaging, provides vocational body builders with maximum flexibility when installing specialized equipment.
The material selection and finishing standards applied throughout the 4700 construction process share principles with Western Red Cedar for Residential Exteriors Material Properties, where the choice of materials and protective coatings directly determines long-term performance and resistance to environmental degradation. Both cases demonstrate that attention to material science at the specification stage yields measurable durability benefits over the service life of the installation.
The Western Star 4700 became available to order in the third quarter of 2011 with targeted deliveries beginning in early 2012. For vocational fleet operators and municipal buyers seeking a Class 8 truck that combines short-hood maneuverability with robust powertrain options and body-builder-friendly engineering, the 4700 represents a thoughtfully engineered solution tailored to the realities of construction site and municipal operations.