EW-4000 AR Rock Rake

Présentation du produit

The EW-4000 AR is a professional-grade, tractor-mounted rock rake specifically engineered for efficient removal of surface and partially buried stones, roots, and debris from agricultural fields, construction sites, and land-development projects. Designed and manufactured in Brazil by Watanabe since the early 2000s, this heavy-duty implement attaches to the three-point hitch and is powered by a standard 540 rpm PTO and a modest 60 L/min hydraulic flow, making it compatible with mid-size tractors starting at 120 CV (approximately 100–140 hp), the most common power range on Brazilian farms and construction fleets.

Unlike lighter landscaping tools or a typical rock rake for lawn mower used on small properties, the EW-4000 AR is built for large-scale, continuous operation in demanding conditions: lateritic soils in Goiás and Minas Gerais, volcanic ash fields in the South, or stony reclaimed pastures in Mato Grosso. Its 3.6-meter working width and aggressive spring-tine drum effectively extract rocks from 5 cm to 30 cm in diameter while windrowing them neatly to the side for easy collection, leaving a clean, level surface ready for planting, seeding, or subsequent soil stabilization.

Contractors and farmers particularly appreciate the machine’s ability to serve as the best rake for weeds in rocks: the rotating drum uproots tough perennial weeds and volunteer plants along with the stones in a single pass, significantly reducing follow-up herbicide applications and preparing cleaner seedbeds. The adjustable drum angle (10°–30°) and hydraulic side-shift allow precise control whether performing aggressive rock picking or lighter surface renovation.

With a robust 1900 kg frame, replaceable hardened tines, and a proven chain-drive system, the EW-4000 AR delivers reliable performance season after season across Brazil and export markets in South America, North America, Africa, and Oceania, making it a practical, cost-effective choice for professionals who need dependable rock removal without the higher purchase and operating costs of imported European or North American alternatives.

Spécifications techniques

The EW-4000 AR is engineered for precision and power, compatible with standard Brazilian tractors. Below is a comprehensive overview of its specifications:

These parameters position the EW-4000 AR as a versatile tool for "estabilização de solo com rake" projects, emphasizing its role in preventing erosion and preparing bases for paving.

Key Features and Benefits

• Robust Spiral Drum Design: Chain-driven drum with adjustable angle (10-30 degrees) for aggressive raking or gentle soil engagement, ideal for Brazil's variable terrains from the Amazon basin to the Pampas.
• Three-Spring Suspension: Isolates shocks from buried rocks, extending equipment life in high-impact environments like quarry-adjacent farms.
• Hydraulic Lateral Displacement: Allows precise maneuvering around obstacles, such as tree lines in coffee plantations.
• Eco-Friendly Operation: Minimizes soil disturbance, supporting sustainable practices aligned with Brazil's agricultural policies (e.g., ABC Plan for low-carbon emission).
• Easy Maintenance: Bolt-on tines and accessible bearings reduce downtime, with parts readily available from our Castro facility.
• Warranty and Support: 2-year warranty, plus on-site service across Brazil via our network in Paraná, São Paulo, and Minas Gerais.

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Comparison Table: EW-4000 AR vs. Competitors

To highlight the EW-4000 AR's superiority, we compare it against leading competitors available in Brazil, such as FAE STABI/FRS (tractor-mounted stabilizer) and BOMAG BPR series (soil stabilizer). Data sourced from manufacturer specifications and Brazilian market analyses.

Avis clients

Here are real experiences shared by owners and operators who have used the EW-4000 AR in different countries and applications:

João Carlos M. – Sugarcane Producer, Ribeirão Preto, São Paulo, Brazil ★★★★☆ "We bought this rock rake for tractor two seasons ago to clean rocky patches in our cane fields. It handles 15–25 cm stones well at 3–4 km/h without overloading our 130 hp Massey Ferguson. The hydraulic side-shift is very useful when working around irrigation pivots. Maintenance has been straightforward and parts are available locally in Paraná. Good value for Brazilian conditions."

Michael Thompson – Row Crop Farmer, Iowa, United States ★★★★★ "I was looking for reliable rock rakes for tractors after trying several imported brands. The EW-4000 AR with 3.6 m working width picks rocks cleanly in our glacial till soils and leaves a level seedbed. The spring suspension really reduces wear when hitting larger buried stones. We now run it ahead of our no-till planter and have noticeably fewer planter issues."

Diego Ramírez – Contractor, Mendoza Province, Argentina ★★★★☆ "We use the machine mainly for vineyard renovation and new orchard establishment. The rock rakes for sale from Watanabe were competitively priced compared to European options. It removes stones up to 30 cm and winds them nicely for later collection. The only small complaint is that in very dry, hard soil the depth wheels can slip slightly, but adjusting tire pressure solved it."

Liam O’Connor – Dairy Farmer, Waikato, New Zealand ★★★★☆ "Needed a heavy-duty rock rake after re-contouring paddocks. The 1900 kg build weight gives good penetration even in our volcanic soils. Works well behind a 125 hp John Deere at 540 rpm. The drum angle adjustment is simple and effective for either aggressive raking or light pasture renovation. Delivery from Brazil took about 9 weeks, which was acceptable."

Pedro Almeida – Road Construction Foreman, Minas Gerais, Brazil ★★★★★ "We use it for site preparation before soil stabilization on rural road projects. The EW-4000 AR clears surface rocks quickly and creates a smooth base for the stabilizer to follow. Fuel consumption is reasonable and the machine has required only routine greasing after 800+ hours. Definitely recommend for contractors working in rocky regions of Brazil."

Sarah Botha – Game Farm Manager, Limpopo Province, South Africa ★★★★☆ "Purchased this unit to clean firebreaks and new grazing camps. It handles quartzite stones common here without problems. The hydraulic requirements (60 L/min) match most of our tractors perfectly. Build quality is solid and the paint has held up well in our harsh sun. Good service support even from South America."

Frequently Asked Questions – EW-4000 AR Rock Rake

1. What exactly does the EW-4000 AR do? The EW-4000 AR is a heavy-duty, PTO-driven rock rake that removes surface and partially buried stones (5–30 cm), roots, and debris while leveling the ground in a single pass. It is primarily used before planting, seeding, pasture renovation, or soil stabilization on farms and construction sites.

2. What is the minimum tractor size required? It requires a tractor of at least 120 CV (approximately 100–110 hp at the PTO) with 540 rpm PTO and a hydraulic flow of 60 L/min. Most common Brazilian tractors from 120 to 180 CV (Massey Ferguson 4700/5700 series, John Deere 5E/6J, New Holland T5/T6, Valtra A/BH, etc.) work perfectly.

3. Can it be used with compact or sub-compact tractors? No. The EW-4000 AR is a professional 1900 kg implement designed for mid-size and larger agricultural tractors. For smaller properties or lawn tractors, lighter landscaping rock rakes are more appropriate.

4. How deep does it work? Standard working depth is 0–20 cm, adjustable via depth wheels and top-link position. It is optimized for surface and near-surface rock removal rather than deep tillage.

5. What size rocks can it handle? It reliably extracts and windrows rocks from 5 cm up to 30 cm in diameter under normal soil conditions. Occasional larger stones can be moved if not fully buried.

6. How much area can it cover in one hour? At the recommended speed of 3–4 km/h with a 3.6 m working width, it covers approximately 1.1–1.4 hectares per hour, depending on rock density and field conditions.

7. Does it require a creeper gear or can it run in normal gears? Normal field gears are sufficient. Most operators use 2nd or 3rd gear in the low range (B2–B4 on synchronized transmissions) to maintain 3.5 km/h.

8. Is the side-shift hydraulic? Yes, it includes hydraulic lateral displacement (approximately 50 cm left/right) using one double-acting remote, very useful for working around obstacles or following contours.

9. How are the rocks collected after windrowing? Rocks are deposited in clean windrows at the side. They can then be picked up with a front-end loader, bucket, or optional rock bucket/windrow picker.

10. What maintenance is required? Daily: grease four fittings (two on the PTO shaft, two on the drum bearings). Every 50 hours: check chain tension and tine wear. Annually: inspect and replace worn tines (bolt-on, reversible hardened steel). Spare parts are stocked year-round at our factory in Castro, Paraná.

11. How long is the warranty? 2 years on manufacturing defects for the original purchaser when used under normal conditions. The PTO driveline and wearable items (tines, bearings) carry a 12-month warranty.

12. Is financing available in Brazil? Yes. We work with Banco John Deere, Banco CNH, Banco do Brasil (Pronaf/Moderfrota lines), and Sicredi to offer competitive financing and Finame/BNDES options for Brazilian customers.

13. How long does delivery take inside Brazil? From our factory in Castro, PR: – South and Southeast regions: 7–15 business days – Midwest and Northeast: 15–25 business days – North region: 25–40 business days

14. Do you ship internationally? Yes. We regularly export to Argentina, Paraguay, Bolivia, Uruguay, United States, South Africa, Australia, and New Zealand. Lead time is typically 60–90 days by container to the destination port.

15. Can it be used for pasture renovation or removing weeds in rocky fields? Absolutely. Many customers use it successfully for aerating old pastures and uprooting tough weeds together with the rocks in one operation.

16. Is there a lighter or narrower model for smaller tractors? Yes. We offer the EW-2500 AR (2.5 m width, 80–100 CV) and EW-3000 AR (3.0 m width, 100–120 CV) for operations that do not require the full 3.6 m capacity.

À propos de Brazil Watanabe Soil Stabilizer Machine Co., Ltd.

Founded in 1970 in Castro, Paraná, Brazil Watanabe Soil Stabilizer Machine Co., Ltd. is a family-owned Brazilian manufacturer with more than 55 years of continuous operation. From the beginning, the company has focused exclusively on tractor-mounted equipment designed for the demanding soil and rock conditions found throughout Brazil and similar regions worldwide.

Our complete product range includes heavy-duty soil stabilizers (WM series), rock rakes (EW-AR series), and stone crushers (TR series). Every machine is engineered, fabricated, and assembled in-house at our 18,000 m² factory on Rodovia PR-151, ensuring consistent quality and immediate availability of spare parts for models dating back to the 1970s.

Today, Watanabe equipment is trusted across all Brazilian states and exported to over 20 countries. We remain committed to manufacturing entirely in Brazil, supporting local jobs, and delivering durable, cost-effective solutions backed by factory-direct service and long-term parts support that professionals have depended on for generations.