Used Dynapac CA251D Roller

Reading: 2154

Here is a detailed introduction to the Dynapac CA251D single-drum vibratory roller in English.

Dynapac CA251D Single-Drum Vibratory Roller

The Dynapac CA251D is a robust, single-drum vibratory roller specifically engineered for medium to large-scale soil compaction projects. As a member of Dynapac's highly regarded CA-series, this machine is built to deliver high productivity, reliability, and excellent compaction results on a wide range of cohesive and non-cohesive materials, including clay, silt, sand, and gravel. The "D" in the model designation typically indicates a standard configuration that includes a fully enclosed ROPS/FOPS cab, providing operator comfort and all-weather protection.

The CA251D is ideally suited for applications such as road base construction, highway sub-bases, large parking lots, industrial sites, airport runways, dam construction, and other heavy civil engineering works.

Key Features and Benefits

1. High-Performance Compaction SystemThe heart of the CA251D is its heavy-duty vibratory drum and high-amplitude vibratory system. It features a dual-amplitude, dual-frequency vibratory mechanism that can be easily adjusted from the operator’s station to match different lift thicknesses and material types. The high centrifugal force, combined with the optimal static linear load, ensures deep penetration and fast compaction of thick layers, reducing the number of passes required.

2. Powerful and Efficient EngineThe CA251D is powered by a modern, water-cooled, turbocharged diesel engine (commonly a Cummins QSB4.5 or a Deutz model, depending on the production year and emission standards). The engine delivers ample power (typically in the range of 97-110 kW / 130-150 hp) while meeting stringent exhaust emission regulations (Stage IIIA / Tier 3 or later). The engine is renowned for its high torque at low RPM, resulting in excellent fuel efficiency, climbing ability, and a long service life.

3. Advanced Traction Drive SystemEquipped with a hydrostatic drive system for both the drum and the rear axle, the CA251D provides smooth, stepless speed control and outstanding traction, even on steep grades. The rear axle typically features a no-spin differential lock, automatically activated in slippery conditions to maximize tractive effort and prevent wheel spin. This ensures continuous operation in challenging terrain and soft underfoot conditions.

4. Operator Comfort and Safety

Ergonomic Cab: The certified ROPS/FOPS cab is isolated from vibration, significantly reducing whole-body vibration and noise levels for the operator. It features a fully adjustable seat, tiltable steering column, excellent visibility to the drum edges and rear, and a powerful climate control system (heating and air conditioning).
Intuitive Controls: All essential functions, including vibration on/off, amplitude selection, speed control, and emergency stop, are ergonomically placed for effortless operation. A clear, easy-to-read instrument panel provides all critical machine data at a glance.
Excellent Visibility: The sloping engine hood and cab design provide excellent forward and rearward visibility, enhancing safety and precision when working near obstacles or curbs.

5. Durability and Serviceability

Robust Structure: The heavy-duty frame and drum are designed to withstand the high stress of demanding compaction work. The drum features a thick shell and smooth finish for a quality mat surface.
Proven Components: The use of industry-leading components (pumps, motors, axles) from renowned manufacturers ensures long-term reliability and global parts availability.
Easy Maintenance: The engine hood opens wide for quick daily checks. Centralized service points, swing-out coolers, and long service intervals minimize downtime. The scraper system (either steel or optional polyurethane) is adjustable and easily replaceable to prevent material build-up on the drum.

Typical Technical Specifications

Please note: Specifications can vary based on machine generation, optional equipment, and regional configurations. The following are representative values for a standard Dynapac CA251D.

Specification	Typical Value
Operating Weight (with cab)	10,500 – 11,200 kg (23,150 – 24,690 lbs)
Max. Operating Weight (with ballast)	~12,500 kg (27,560 lbs)
Drum Diameter	1,500 mm (59 in)
Drum Width	2,130 mm (84 in)
Static Linear Load	approx. 25 – 29 kg/cm
Vibration Frequency	High: 33 Hz (1,980 vpm) / Low: 30 Hz (1,800 vpm)
Nominal Amplitude	High: 1.8 mm (0.07 in) / Low: 0.9 mm (0.035 in)
Centrifugal Force	High: 250 kN / Low: 180 kN
Engine Model (Example)	Cummins QSB4.5 or Deutz TCD4.1 L04
Engine Power (at rated RPM)	97 – 110 kW (130 – 148 hp)
Travel Speed (forward/reverse)	0 – 8 km/h (0 – 5 mph)
Gradeability (theoretical)	approx. 45 – 50%
Fuel Tank Capacity	~230 liters (60 US gal)
Sound Power Level (LwA)	105 dB(A) (typical)

Optional Equipment

To tailor the machine to specific project needs, the Dynapac CA251D can be equipped with various options:

Drum Upgrades: A padfoot drum (shell kit) is available for cohesive soil and high-speed compaction of silty materials, transforming the roller into a powerful compactor for challenging soils.
Compaction Meter: The Dynapac Compaction Meter (DCM) system provides the operator with real-time feedback on the relative stiffness of the soil, helping to avoid over-compaction and detect weak spots.
Bulldozer Blade: A front-mounted dozer blade can be fitted to spread and level material, making the roller a versatile earthmoving tool.
Chip Spreader: An integrated chip spreader system is available for surface treatment work.

The Dynapac CA251D remains a popular choice worldwide for contractors who require a dependable, high-production soil compactor that combines strong performance with low operating costs and excellent operator comfort.

Non flooded

No accident

Original product

Used Dynapac CA251D Roller

RELATED PRODUCTS

Dynapac CA251D

XCMG XS143J

Dynapac CA251D

Hamm HD138