Stewart-Amos Mechanical Broom Sweeper
Starfire S-6t
Full-size dual-engine mechanical broom on a large CDL chassis with the industry's largest 6 yd³ hopper. 350-gallon water system, 12' 2" dump height. Built for the most demanding applications.
Overview
Built for the way Texas crews work
The Starfire S-6t is Stewart-Amos' full-size, two-engine mechanical broom sweeper mounted on a large CDL chassis for the most demanding municipal, construction, highway, and milling cleanup work.
Its 6.0 cubic yard top-loading hopper is the largest Starfire mechanical broom hopper, paired with a 350 gallon water system, 12-flight elevator, 54 inch gutter brooms, and a high dump range from 15 inches up to 146 inches depending on chassis.
For contractors who need more hopper capacity and duty cycle than the compact Starfire models, the S-6t is the high-production mechanical broom platform in the lineup.
6.0 cubic yard top-loading hopper, the largest Starfire mechanical broom hopper.
33,000 lb GVWR large CDL chassis for heavy-duty municipal and contractor work.
10 ft sweeping path with 54 in gutter brooms.
350 gallon water system for dust control across front, main broom, and gutter broom spray zones.
12-flight elevator and 54 in dump door reach for high-volume debris loading and unloading.
SCAQMD PM-10 Rule 1186 certified for environmentally conscious sweeping.
Key Specs
- Model
- S-6t
- Sweeping path
- 10 ft, 10 ft optional configuration noted by Stewart-Amos
- Chassis GVWR
- 33,000 lb
- CDL required
- Yes
- Hopper capacity
- 6.0 cu yd top-loading
- Hydraulic power train
- Auxiliary engine
- Dump height
- 15 in to 146 in
- Gutter broom size
- 54 in
- Water capacity
- 350 gal
- Elevator
- 12 flights
- Dump door reach
- 54 in
- Sweeper engine
- 59 HP Kubota turbo diesel
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.
Top-loading hopper
The 6.0 yd³ hopper is built for high-volume debris collection and top-load dumping into larger trucks.
Milling cleanup
The S-6t is positioned for demanding millings, chip seal, and open-road cleanup work.
High dump operation
High-lift scissors and hopper stabilizers support dumping into tall-sided debris trucks.
Maintenance Videos
Factory Starfire Training
These Stewart-Amos training videos cover the core broom and sensor adjustments that keep a Starfire sweeper performing correctly in the field.
Gutter broom maintenance, adjustments, and operation
Factory Starfire Series training video covering gutter broom setup and maintenance.
Main broom maintenance, adjustments, and operation
Factory Starfire Series training video for main broom operation and adjustment.
Proximity sensor adjustments
Factory Starfire Series training video covering proximity sensor adjustment.
Technical Specifications
Starfire S-6t Spec Details
Specifications below are pulled from manufacturer materials and Closner product research. Final build details can change by chassis, configuration, and option package.
General
- Sweeping path
- 10 ft
- Debris hopper
- 6.0 cu yd top-loading
- GVWR
- 33,000 lb
- CDL
- Required
- Dump height
- 15 in to 146 in, chassis dependent
- Dump door reach
- 54 in
- Water capacity
- 350 gal
Brooms And Elevator
- Gutter brooms
- 54 in spring-balanced gutter brooms
- Main broom
- Mechanical broom package with in-cab hydraulic controls
- Elevator
- 12-flight elevator
- Debris loading
- Top-loading hopper design
- Hopper stabilizing
- Stabilizer system for high-dump operation
Power And Controls
- Sweeper power
- Auxiliary engine hydraulic power train
- Engine
- 59 HP Kubota turbo-charged diesel
- Engine protection
- High-temperature and low-oil-pressure automatic shutdown
- Controls
- Electric-over-hydraulic sweeper controls
- Camera system
- Standard monitor and camera visibility package
S-6t vs S-6s
- S-6t power train
- Auxiliary engine
- S-6s power train
- PTO
- Shared hopper
- 6.0 cu yd top-loading
- Shared chassis
- 33,000 lb GVWR CDL chassis
- Shared water system
- 350 gal
Features
Starfire S-6t advantages
Largest Starfire hopper
A 6.0 cubic yard top-loading hopper keeps crews productive on high-volume sweeping routes and cleanup jobs.
Heavy-duty CDL chassis
The 33,000 lb GVWR chassis gives the S-6t the frame, payload, and durability needed for heavy continuous-duty sweeping.
High-dump stability
Large lift scissors and hopper stabilizers help control the raised hopper during high-dump unloading.
54 inch gutter brooms
Large spring-balanced gutter brooms help carry material from the curb line into the main broom path.
Water and dust control
A 350 gallon water system supports dusty milling, construction, and municipal sweeping conditions.
Service-friendly systems
Camera visibility, protected wiring, case drains, and electric-over-hydraulic controls support faster daily service and troubleshooting.
Gallery
Starfire S-6t Photos
Factory model photos and system views for a closer look at the machine.
FAQ
Common Starfire S-6t Questions
Does the Starfire S-6t require a CDL?
Yes. Stewart-Amos lists the S-6t on a 33,000 lb GVWR chassis and marks CDL required for this model.
What is the hopper capacity on the S-6t?
The Starfire S-6t uses a 6.0 cubic yard top-loading hopper, which Stewart-Amos describes as the largest available in the Starfire mechanical broom lineup.
How does the S-6t differ from the S-6s?
The S-6t uses an auxiliary engine hydraulic power train, while the S-6s uses PTO power. Both share the 6.0 cubic yard top-loading hopper, 33,000 lb GVWR chassis, 350 gallon water system, and 12-flight elevator.
More Stewart-Amos Models
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Starfire S-4XL
Extra heavy-duty dual-engine mechanical broom with 4.5 yd³ hopper on a large conventional chassis. 26,000 lb GVWR — no CDL required. Built for continuous-duty chip seal, millings, and highway sweeping.
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Starfire S-4XXL
Extra heavy-duty dual-engine mechanical broom with 4.5 yd³ hopper. 33,000 lb GVWR — CDL required. Purpose-built for the most demanding continuous-duty sweeping operations.
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