Stewart-Amos Mechanical Broom Sweeper
Starfire S-4c
4 yd³ dual-engine mechanical broom sweeper on a compact cab-over chassis. No CDL required. SCAQMD PM-10 certified. Ideal for city streets, cul-de-sacs, and milling jobs.
Overview
Built for the way Texas crews work
The Stewart-Amos Starfire S-4c is a heavy-duty 4.0 cubic yard dual-engine mechanical broom street sweeper built on a highly maneuverable 19,500 lb GVWR cab-over chassis. It gives contractors and municipalities productive mechanical broom sweeping without requiring a CDL under the published chassis rating.
The S-4c is designed for day-in, day-out sweeping on confined city streets, cul-de-sacs, construction cleanup, milling work, chip seal cleanup, and open-road applications. Its short wheelbase, 16 ft 9 in turning radius, 10 ft maximum sweeping path, and highway-speed travel make it a practical choice when one sweeper needs to move quickly between scattered jobs.
Stewart-Amos keeps the machine intentionally serviceable: spring-balanced brooms, a three-shaft elevator, electric-over-hydraulic controls, protected wiring, standard camera visibility, and wide-open access points all support the company's Effectively Simple design philosophy.
4.0 cu yd volumetric debris hopper on a compact cab-over chassis.
19,500 lb GVWR published chassis rating; no CDL required.
10 ft maximum sweeping path with dual 42 in gutter brooms.
Variable dump height from 16 in to 132 in, with 44 in hopper door reach.
200 gal polyethylene water system with front, main broom, and gutter broom spray coverage.
SCAQMD PM-10 Rule 1186 certified for dust-conscious sweeping work.
Key Specs
- Model
- Starfire S-4c
- Sweeping path
- 10 ft maximum
- Chassis GVWR
- 19,500 lb
- CDL required
- No
- Hopper capacity
- 4.0 cu yd volumetric
- Hydraulic power train
- Auxiliary engine
- Dump height
- 16 in to 132 in
- Turning radius
- 16 ft 9 in
- Water capacity
- 200 gal
- Sweeper engine
- 59 HP Kubota turbo diesel
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-4c 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 maximum
- Debris hopper
- 4.0 cu yd volumetric
- Dump height
- 16 in to 132 in
- Turning radius
- 16 ft 9 in
- Overall length
- 19 ft 5 in
- Overall height
- 102.5 in including strobe lights
- GVWR
- 19,500 lb
Main Broom
- Length / diameter
- 58 in length, 36 in diameter
- Type
- Chevron poly-wire combo
- Drive
- Hydraulic motor, direct drive, reversible
- Mounting
- Full-floating trailing arm with shocks
- Lift control
- Hydraulic, in-cab
- Speed
- Variable with auxiliary engine rpm
- Dirt shoes
- 2 in carbide
Dual Gutter Brooms
- Diameter
- 42 in
- Type
- Spring-balanced, automatic wear compensating
- Drive
- Hydraulic and reversible
- Mounting
- Free-floating trailing arm
- Lift control
- Hydraulic, in-cab
- Tilt control
- Electric, in-cab
- Float protection
- Dual float protected
Elevator And Hopper
- Elevator type
- 7-flight squeegee with replaceable rubber edging
- Elevator liner
- Bolt-in, two-piece AR steel plates
- Chain
- Heavy-duty constant radius roller chain
- Sprockets
- Urethane
- Shafts
- Three-shaft elevator design
- Stall warning
- In-cab buzzer and light
- Flushing
- Built-in elevator flushing system
- Hopper door reach
- 44 in from side
- Lift system
- Four-corner hopper lift with quad double X-style scissors
- Dump side
- Right curb-side standard; left street-side available by configuration
Hydraulic And Water Systems
- Hydraulic pump
- Dual tandem gear
- Hydraulic capacity
- 22 gpm at 2000 rpm
- Hydraulic reservoir
- 40 gal
- Hydraulic filtration
- 10 micron oil filter
- Oil cooler
- Electric remote-mounted cooler
- Water tank
- 200 gal polyethylene
- Water pump
- 3.6 gpm electric diaphragm
- Spray nozzles
- 4 front spray bar, 2 per gutter broom, 4 main broom
- Fill hose
- 20 ft with NST coupler and anti-siphon air gap
Power, Controls, And Safety
- Sweeper engine
- Kubota V2403-M-T-E3 T4 Interim
- Horsepower
- 59 HP at 2700 rpm
- Engine type
- In-line four-cylinder turbo diesel
- Electrical
- 120 amp alternator, 12 volt system
- Camera system
- 7 in color monitor with right gutter broom and rear backup cameras
- Controls
- Sweeper rocker switches, electric throttle, hour meter, tachometer, console night light
- Standard safety
- Backup alarm, auto pickup in reverse, high-temp/low-pressure auto shutdown
- Fuel tank
- 36 gal common fuel tank
Features
Starfire S-4c advantages
Exclusive three-shaft elevator
The third shaft supports return-chain geometry, reduces chain slap, extends chain wear life, and helps maintain unrestricted debris movement through the elevator.
Spring-balanced broom pressure
The full-floating main broom and gutter brooms automatically compensate for wear, reducing operator judgment and helping maximize broom life.
Stable high-dump hopper
A four-corner hopper lift and quad double X-style scissors provide stability when dumping wet, sticky, or unbalanced debris at heights up to 11 ft.
Compact non-CDL maneuverability
The 109 in wheelbase cab-over chassis creates a tight 16 ft 9 in turning radius for neighborhoods, downtown streets, parking lots, and confined jobs.
Dust-control water package
A 200 gallon tank, 3.6 gpm pump, spray bar, gutter broom nozzles, main broom nozzles, and elevator wash-down support dusty municipal and construction work.
Service-friendly systems
Electric-over-hydraulic controls, pressure gauges, protected wiring, case drains, lockable canopies, and open service access keep troubleshooting straightforward.
Gallery
Starfire S-4c Photos
Factory model photos and system views for a closer look at the machine.
FAQ
Common Starfire S-4c Questions
Does the Starfire S-4c require a CDL?
The published S-4c chassis GVWR is 19,500 lb, and Stewart-Amos positions the machine as no-CDL-required. Always confirm final licensing requirements for your jurisdiction and configuration.
What is the hopper capacity on the S-4c?
The Starfire S-4c uses a 4.0 cubic yard volumetric debris hopper with variable dumping from 16 inches up to 132 inches.
What type of sweeping work is the S-4c built for?
The S-4c is built for municipal streets, cul-de-sacs, construction cleanup, milling jobs, chip seal cleanup, parking lots, industrial yards, and open-road sweeping.
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