Rosco Asphalt Distributor
Maximizer 4B
High-output Rosco distributor with 24 ft fully circulating folding/extending spray bar, 560 gpm Viking pump, automatic application-rate control, and 2,050 to 5,313 gal tank range.
Overview
Built for the way Texas crews work
The Rosco Maximizer 4B is the high-output Maximizer distributor for crews that need a bigger application system. It steps up to a 24 ft fully circulating folding and extending spray bar and a larger 560 gpm Viking asphalt pump.
For county, contractor, and chip-seal crews chasing higher daily production, the 4B is the Rosco distributor to compare against the popular Max 3B.
24 ft fully circulating folding and extending spray bar.
560 gpm Viking positive displacement asphalt pump.
Automatic application-rate control.
Plus+1 CAN Bus controls with color display.
Enviro-flush cleanout.
Tank capacity range listed from 2,050 to 5,313 gal depending on build.
Key Specs
- Tank capacity
- 2,050 to 5,313 gal
- Spray bar
- 24 ft fully circulating folding and extending spray bar
- Pump
- 560 gpm Viking positive displacement pump
- Controls
- Plus+1 CAN Bus with automatic application-rate control
- Display
- Color display
- Cleanout
- Enviro-flush system
Field Details
See the machine at work
Close-up photos and jobsite views show how the machine is built, configured, serviced, and used beyond the spec sheet.
Working spray system
The Max 4B imagery includes the machine spraying material in the field.
Large distributor platform
The larger tank and distributor package is meant for high-production road programs.
Service and access points
Additional photos show the tank, platform, hatch, and working areas around the distributor.
Videos
Maximizer 4B Video Library
Manufacturer videos and training content for understanding the machine, its setup, and the systems crews rely on in the field.
Rosco Maximizer 4B Distributor
Manufacturer video overview of the Rosco Maximizer 4B distributor.
Technical Specifications
Maximizer 4B Spec Details
Specifications below are pulled from manufacturer materials and Closner product research. Final build details can change by chassis, configuration, and option package.
High-Output Application
- Spray bar
- 24 ft fully circulating folding and extending spray bar
- Pump
- 560 gpm Viking positive displacement asphalt pump
- Rate control
- Automatic application-rate control
- Control system
- Plus+1 CAN Bus
Capacity And Service
- Tank capacity
- 2,050 to 5,313 gal
- Cleanout
- Enviro-flush system
- Platform
- Truck-mounted asphalt distributor
- Best fit
- Larger chip-seal, seal-coat, and road-maintenance programs
Features
Maximizer 4B advantages
Largest Maximizer spray-bar package
The 24 ft fully circulating folding and extending bar is the key reason crews compare the Max 4B when they need more production.
560 gpm Viking pump
The 4B steps up to a 560 gpm Viking positive displacement pump for larger distributor work.
Field production
Official field photos show the Max 4B spraying and working in road-maintenance conditions.
Operator-focused control
Automatic application-rate control and Plus+1 CAN Bus systems help the operator manage a bigger distributor package.
Gallery
Maximizer 4B Photos
Factory model photos and system views for a closer look at the machine.
FAQ
Common Maximizer 4B Questions
Who supports the Maximizer 4B in Texas?
Closner Equipment supports Rosco and LeeBoy distributor customers across Texas with sales guidance, rental and purchase planning, OEM parts, service, and application support from our San Antonio, Austin, DFW, and Houston-area teams.
What work is the Maximizer 4B best for?
The Max 4B is the high-production choice for larger chip-seal, seal-coat, fog-seal, and road-maintenance programs that benefit from a 24 ft spray-bar package and larger pump capacity.
Can Closner help spec the truck, tank, spray bar, and controls?
Yes. Distributor builds depend on route type, material, spray width, chassis, operator preference, and local maintenance workflow. Closner can help compare tank capacity, spray-bar setup, hand-spray needs, cleanout options, and service access before ordering.
More Rosco Models
Asphalt Distributor
Maximizer 3B
Closner's most popular Rosco distributor conversation: a truck-mounted asphalt distributor with fully circulating extending spray bar, automatic application-rate control, 400 gpm Viking pump, and 990 to 5,313 gal tank range.
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Maximizer 2B
Folding-bar Rosco asphalt distributor with triple-overlap fan spray pattern, automatic application-rate control, 400 gpm Viking pump, and Plus+1 CAN Bus controls.
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Dual-tank Rosco maintenance distributor with independent 600 gal front and 300 gal rear tanks, front and rear spray bars, Plus+1 controls, and route-support options.
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