EP-9YFS-2.2 Double-Compartment Square Baler — High-Capacity Two-Chamber Trailed Hay Baler
その EP-9YFS-2.2 Double-Compartment Square Baler (also known as a two-chamber square straw baler, dual-chamber large square baler, or twin-chamber rectangular baler) is a heavy-duty, trailed field baler engineered for continuous high-output baling of wheat straw, rice straw, corn stover, alfalfa, ryegrass, and other long-stem forage crops. As a premium OEM-specification alternative fully compatible with industry benchmarks such as the Hesston 4690 / 4690S square baler series, the EP-9YFS-2.2 delivers equivalent or superior performance at a significantly lower total cost of ownership — making it the preferred choice for large farms, custom-harvesting contractors, and forage dealers worldwide.
🐄 Livestock Feed
🔥 Biomass Energy
🌿 Alfalfa / Forage
🌿 Straw Recycling
🏭 Agricultural Contractors
Why Choose the EP-9YFS-2.2 Double-Chamber Square Baler?
- 2,200 mm wide pickup for maximum field coverage per pass
- Dual-chamber (2×2 knotters) design doubles throughput without increasing passes
- Automatic rope baling — zero manual tying intervention required
- Spring-tooth pickup + fork feeding for low-loss gentle crop handling
- Compact bale cross-section (460×360 mm) ideal for mechanised handling and export
- Wide tractor compatibility: requires only 51.5 kW (70 hp) PTO-equipped tractor
Technical Parameters — Model 9YFS-2.2 Double-Chamber Square Baler
| いいえ。 | パラメータ | ユニット | 仕様 |
|---|---|---|---|
| 1 | モデル名 | — | 9YFS-2.2 Double-Chamber Square Baler |
| 2 | Hitching Method | — | 引きずられた |
| 3 | Picking Width | んん | 2,200 |
| 4 | Feeding Inlet Width | んん | 2,200 |
| 5 | Picker Structure | — | スプリング歯型 |
| 6 | Feeder Structure | — | Fork Feeding Mechanism |
| 7 | Knotter Type | — | DHB Type |
| 8 | Number of Knotters | pc | 2×2 (4 total) |
| 9 | Compression Chamber Section (W x H) | んん | 460 x 360 x 2 |
| 10 | 梱包方法 | — | Automatic Rope Baling |
| 11 | マッチングパワーレンジ | キロワット | 51.5 or above (70 hp or above) |
| 12 | Overall Dimension (L x W x H) | んん | 5,600 x 2,780 x 1,790 |
| 13 | Machine Weight | kg | 3,115 |
How the EP-9YFS-2.2 Double-Compartment Square Baler Works
The EP-9YFS-2.2 operates as a fully integrated, tractor-trailed, PTO-driven baling system. Once the tractor engages the driveline, mechanical energy is transmitted through a gearbox and flywheel to power all functional components simultaneously — pickup, feeding, compression, knotting, and ejection.
Step-by-Step Operating Sequence
- Crop Pickup: The 2,200 mm wide spring-tooth pickup reel lifts windrowed straw or forage from the ground. Spring-tooth fingers provide aggressive yet gentle lifting, minimising leaf shatter and field losses even at high operating speeds.
- Fork Feeding: A reciprocating fork-feeding mechanism meters crop material into the two parallel compression chambers, ensuring consistent charge mass per stroke and uniform bale density throughout the day.
- Dual-Chamber Compression: Twin plungers inside the 460×360 mm chambers simultaneously compress each crop charge. The dual-channel design effectively doubles net baling throughput without increasing machine working width beyond manageable road-transport dimensions.
- DHB Knotter Tying: At the preset bale-length threshold, the 2×2 DHB (Double Hook Bill) knotters engage automatically, tying two parallel twine wraps per bale in each chamber. No manual tying intervention is ever required.
- Bale Ejection: Completed bales are ejected from the rear chute, ready for collection, stacking, or direct loading onto trailers.
⚙ All mechanical motions — pickup, feeding, plunger stroke, knotter cycle — are driven by a single PTO input, keeping the driveline simple, low-maintenance, and field-proven over thousands of operating hours.
🔩 PTO Shaft — The Critical Power Link Between Tractor and Baler
The EP-9YFS-2.2 requires a robust, correctly-rated PTOシャフト (also called a power take-off driveline, cardan shaft, or implement shaft) to transmit engine torque from the tractor to the baler input gearbox. Selecting the right shaft directly affects baling efficiency, operator safety, and machine longevity. Key selection criteria include:
- Torque rating: Must handle peak torque demands of the dual-plunger mechanism. A torque-limiter clutch (friction or shear-bolt type) is strongly recommended.
- Operating angle: Keep universal-joint operating angles below 15 degrees to minimise vibration and extend cross-kit service life.
- Shaft length: Must telescope correctly throughout the full hitch articulation range — neither bottoming out nor pulling apart during sharp turns.
- Spline profile: Match the tractor PTO stub standard — 540 rpm (6-spline) or 1,000 rpm (21-spline) as applicable to your model.
- Safety guard: A full CE-rated shielding system is mandatory for operator protection under EU and many export-market regulations.
For square-baler specific driveline solutions, including models compatible with the Hesston 4690 / 4690S specification, we recommend consulting dedicated PTO shaft specialists. Our preferred supply partner offers a range of purpose-built, torque-rated, CE-certified options — view the
PTOシャフト
designed for Hesston 4690 / 4690S square balers, which is also dimensionally compatible with the EP-9YFS-2.2. Correct shaft selection protects your investment and maximises seasonal uptime.
8 Core Advantages of the EP-9YFS-2.2 Dual-Chamber Square Baler
Ultra-Wide 2,200 mm Pickup
Covers the widest windrows in a single pass, slashing field time and fuel consumption per tonne of baled material compared with standard 1,800 mm machines.
Dual-Chamber Doubles Throughput
Two parallel compression chambers operating simultaneously deliver twice the bale output per hour compared with single-channel balers of equivalent working width.
Fully Automatic Rope Baling
DHB-type knotters automatically tie every bale. No manual tying stops means the operator never needs to leave the cab — critical for large-acreage time-sensitive harvests.
Low-Loss Spring-Tooth Pickup
Spring-tooth reel tines gently lift fragile crops from the swath with minimal leaf and grain losses, preserving feed value and maximising recovered tonnage per acre.
Compact Bale Size for Easy Handling
The 460×360 mm cross-section produces medium-density square bales that stack mechanically or by hand, transport efficiently, and command premium prices in domestic and export feed markets.
Single PTO Input — Simple Driveline
All working groups are powered from a single PTO input, minimising rotating part count and reducing maintenance complexity. Less downtime, more field hours per season.
Wide Multi-Crop Adaptability
Handles wheat straw, rice straw, corn stover, alfalfa, ryegrass, oat straw, cotton stalks, and most fibrous biomass crops with equal consistency across seasons.
Outstanding Total Cost of Ownership
Factory-direct pricing, internationally sourced components, and a comprehensive spare-parts programme deliver a lower lifetime cost per bale than equivalent Western-brand machines.
Structure Design and Material Engineering
Main Frame
The mainframe is fabricated from high-tensile structural steel (Q355B or equivalent) using robotic MIG welding for consistent joint penetration. Finite-element analysis guides the rib-reinforced box-section design, absorbing high cyclical plunger loads over tens of thousands of field hours without fatigue cracking. The entire frame receives multi-stage shot-blasting (Sa 2.5 standard) followed by epoxy primer and polyurethane topcoat, providing long-term corrosion resistance in humid tropical and temperate climates alike.
Pickup Reel
The 2,200 mm spring-tooth pickup reel uses hardened 65Mn spring-steel tines heat-treated to 44-48 HRC. Tine spacing is optimised for both fine-stemmed material (alfalfa, ryegrass) and coarse crops (corn stover, sorghum residue) without plugging. The cam-follower tine-lifting system ensures positive crop release at the top of the pickup arc.
Compression Chambers
Twin compression chambers are lined with wear-resistant Mn13 (Hadfield) steel plates on high-wear plunger faces. Internal chamber geometry is precision-machined to 0.5 mm tolerances to ensure bale-face uniformity and consistent knotter timing accuracy. Self-lubricating bronze bushings at plunger pivot points extend service intervals between scheduled maintenance stops.
DHB Knotter Mechanism
The DHB (Double Hook Bill) knotter assemblies are manufactured from die-cast grey iron with hardened-steel billhook surfaces induction-hardened to 55-60 HRC and precision-ground for repeatable twine grip and release. The 2×2 arrangement (four knotters total) guarantees uniform bale-end faces in both chambers simultaneously.
Gearbox and Driveline
The primary input gearbox housing is cast from EN-GJL-250 grey iron. Helical gear pairs are cut to DIN 3 accuracy class for low-noise, high-efficiency power transfer. All bearings are sealed-for-life (SFL) rated for 10,000 or more operating hours. Overload protection is provided by a shear-bolt safety clutch on the flywheel input shaft, protecting the entire driveline from sudden crop jam shock loads.
Typical Application Scenarios for the EP-9YFS-2.2 Square Baler
🌾 Wheat and Rice Straw Recovery
After grain harvest, the machine follows the combine to bale standing windrows. The wide pickup eliminates swath-merging passes. Bales are sold to paper mills, mushroom substrate producers, or livestock feed processors at consistent quality grades.
🐄 Livestock Forage — Alfalfa and Ryegrass
Spring-tooth pickup minimises leaf shatter losses in high-value alfalfa cuts. Uniform bale density ensures consistent airflow through stack ventilation, reducing dry-matter losses during storage and improving feed quality delivered to dairy and beef herds.
🌿 Corn Stover Biomass Collection
Post-maize harvest, the baler collects chopped or long corn stover for biogas plants, pellet mills, or direct combustion energy centres. The dual-chamber design handles high-bulk, low-density material without chamber plugging.
🔥 Biomass Energy and Fuel Baling
Compressed square bales provide consistent bulk density for thermal power plants co-firing straw with coal. Uniform bale geometry improves automated conveying and boiler-feeding system reliability, reducing plant downtime.
🏗 Agricultural Contracting Services
Custom-hire contractors benefit from the machine’s high daily capacity and ability to work across multiple crop types in a single season without tooling changes. At 2,780 mm transport width, road transit requires no special permit in most markets.
🌿 Cotton Stalk and Oilseed Residue
The robust fork-feeding mechanism handles tough, tangled cotton stalks and dense oilseed residues that overwhelm lighter balers. The heavy-duty plunger and Mn13-lined chamber resist accelerated wear from siliceous soil contaminants common in arid growing regions.
Selection Guide — Choosing the Right Square Baler for Your Operation
Before ordering, confirm the following parameters to ensure the EP-9YFS-2.2 is the correct model for your specific conditions:
1. Tractor Power and PTO Type
Confirm your tractor delivers 51.5 kW (70 hp) or more at the PTO. Specify whether the PTO stub is 540 rpm (6-spline) or 1,000 rpm (21-spline) — this determines input gearbox ratio and PTO shaft specification.
2. Target Crop Type and Condition
Specify primary crop (wheat, alfalfa, corn stover, etc.), typical windrow width, and average moisture content. Material above 20% moisture may require a conditioning pass before baling to avoid knotter failures and mould growth.
3. Required Daily Throughput
Calculate your peak-season daily tonnage target. The 9YFS-2.2 is rated for large-scale operations. Confirm whether one machine covers your acreage within the available weather window, or whether a second unit is warranted.
4. Bale Handling Infrastructure
The 460×360 mm bale cross-section is compatible with standard medium-square-bale handling equipment (stackers, grab forks, loaders). Verify downstream handling systems before ordering to avoid bale-size mismatch with existing equipment.
5. Road Transport Width Rules
Overall transport width is 2,780 mm. Confirm local road-transport regulations before movement. Most countries do not require a special oversize permit below 3,000 mm, but regulations vary by jurisdiction and road class.
6. Twine and Rope Specification
Confirm preferred twine material (sisal, polypropylene, UV-stabilised PP) and required knot-strength grade. The DHB knotter is compatible with standard medium-square-baler twines. Contact our technical team for unusual bale-density requirements.
EP-9YFS-2.2 vs. Hesston 4690 / 4690S — Objective Feature and Value Comparison
| Comparison Item | EP-9YFS-2.2 | Hesston 4690 / 4690S (Reference) |
|---|---|---|
| Configuration | Twin-chamber, trailed | Large square, trailed |
| ピックアップ幅 | 2,200 mm | approx. 2,130 mm (84 in) |
| Number of Chambers | 2 (dual) | 1 (single) |
| Knotters | 2×2 DHB — 4 total | 6 (single chamber) |
| Bale Chamber Cross-Section | 460×360 mm x 2 channels | approx. 610×460 mm x 1 channel |
| Minimum Tractor Power | 51.5 kW (70 hp) | approx. 110-130 hp |
| Machine Weight | 3,115 kg | approx. 5,700 kg and above |
| Tractor Compatibility | Mid-range tractors (70-120 hp) | High-power tractors required |
| Purchase Price Range | Significantly lower — factory direct | USD 80,000-120,000 and above |
| Spare Parts Lead Time | Short — global export stock | Dealer-dependent, varies by country |
| After-Sales Support | Direct manufacturer, 24-month warranty | Regional dealer network |
| Best Suited For | Mid-to-large farms, contractors, export markets seeking high value | Very large North American and EU commercial operations |
Reference data for Hesston 4690 / 4690S is based on publicly available published specifications. Field performance may vary based on crop conditions, operator skill, and machine configuration. Contact us for a detailed technical comparison specific to your operation scale and crop type.
Frequently Asked Questions — EP-9YFS-2.2 Double-Compartment Square Baler
Q1: What is the difference between a single-chamber and a double-chamber square baler?
A single-chamber baler processes crop through one compression channel, producing one bale at a time. A double-chamber (dual-chamber) baler like the EP-9YFS-2.2 runs two parallel compression channels simultaneously, doubling bale output per unit time at the same tractor speed and working width. This makes the dual-chamber design significantly more productive per hour and per litre of diesel consumed, reducing the cost per bale on large operations.
Q2: What minimum tractor horsepower does the 9YFS-2.2 require?
The EP-9YFS-2.2 requires a tractor with a minimum PTO output of 51.5 kW (approximately 70 hp). For heavy crops such as dense corn stover or high-moisture grass, we recommend a tractor in the 80-100 hp range to ensure consistent bale density and avoid knotter timing problems caused by insufficient flywheel energy.
Q3: What types of twine are compatible with the DHB knotter?
The DHB (Double Hook Bill) knotter is compatible with natural sisal twine (200 m/kg, 130 kg breaking strength or higher), UV-stabilised polypropylene twine (130-160 kg breaking strength), and twisted jute. Net wrap is not supported on this model. Always ensure twine diameter and tension are within the knotter specification range. Our technical team advises on optimal twine grade per crop type on request.
Q4: Can the EP-9YFS-2.2 bale rice straw and cotton stalks without modification?
Yes. The machine is designed for a wide range of fibrous crop residues including rice straw, wheat straw, corn stover, cotton stalks, and oilseed residues. The robust fork-feeding mechanism and heavy-duty compression chamber handle tangled or siliceous material without plugging. For very coarse material such as dry cotton stalks, reducing forward speed slightly allows the pickup reel to lift material cleanly before the feeding mechanism engages.
Q5: What are the overall transport dimensions and is a wide-load permit required?
The EP-9YFS-2.2 measures 5,600 mm (L) x 2,780 mm (W) x 1,790 mm (H) in transport configuration. At 2,780 mm wide, it falls below the 3,000 mm threshold that typically triggers mandatory wide-load permits in most markets including the EU, UK, Australia, and Southeast Asia. Always verify local road-transport regulations before movement, as requirements vary by jurisdiction and road class.
Q6: How does the automatic rope baling system work?
A mechanical bale-length metering wheel tracks bale growth inside each chamber. When the preset bale length is reached, the wheel trips the knotter cam mechanism. The DHB knotters engage, wrap twine around the bale end, form a secure knot, and cut the twine — all within a single plunger stroke cycle. The operator does not need to stop the tractor or manually intervene at any point during the tying cycle.
Q7: What is the recommended maintenance schedule?
Daily: grease all fittings (8-12 points), check knotter timing and twine tension, inspect pickup teeth for damage. Weekly: check gearbox oil level, inspect chain tension, check plunger-to-chamber wall clearance. Seasonal: replace gearbox oil, inspect all bearings, replace worn pickup teeth, check shear-bolt on flywheel safety clutch. A full maintenance manual is supplied with every machine and available as a digital download from our support portal.
Q8: Are spare parts readily available internationally?
Yes. We maintain an export spare-parts inventory covering all fast-wear components: pickup tines, knotter billhooks, twine discs, plunger seals, chain sets, and gearbox seals. Parts are exported globally via DHL or FedEx express, or by sea freight consolidated shipment. Critical knotter wear parts are typically dispatched within 48 hours of order confirmation. A recommended first-season spare-parts kit is available with each new machine.
Q9: What warranty does the EP-9YFS-2.2 carry?
The EP-9YFS-2.2 is covered by a 24-month manufacturer warranty on structural components and gearbox assemblies, and a 12-month warranty on knotter mechanisms and wear parts. Warranty claims are processed directly with our factory engineering team — no third-party dealer intermediary required. Video-based remote diagnosis is available for all warranty assessments, minimising downtime regardless of your location.
Q10: Can the EP-9YFS-2.2 be customised for specific market requirements such as CE certification or alternative bale dimensions?
Yes. We offer factory customisation options including CE-conformity documentation packages for EU market entry, alternative bale cross-section moulds (subject to minimum order quantity), language-localised operator manuals, and OEM or private-label branding for distributors. Minimum order quantities for custom configurations are negotiable — contact our export sales team with your specific requirements and timeline.
Partner with Us — Factory-Direct Square Balers for Global Markets
We supply EP-9YFS-2.2 Double-Compartment Square Balers factory-direct to distributors, importers, agricultural equipment dealers, and large farming enterprises worldwide. Whether you need a single unit for evaluation or a full container load for seasonal deployment, our export team supports every order from quotation to after-sales service.
Explore our full range of high-efficiency square balers and round balers — including models for small farms, large-scale commercial operations, and specialist biomass applications — and discover why agricultural operators in 40 or more countries choose our machines season after season.