Description
EP-GS4RC Rotary Cutter Gearbox — Precision Power Transmission for Modern Mowing
The EP-GS4RC represents the latest in agricultural gearbox engineering. With 30 hk capacity, 1:1.46 / 1:1.93 ratio configuration, and 19 Kg optimized construction, it delivers the power density and reliability today’s farming operations require.
📈 EP-GS4RC Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | EP-GS4RC |
| Gearbox Type | Roterande skärväxellåda |
| Gear Ratio(s) | 1:1.46 / 1:1.93 |
| Teeth Configuration | 22/15, 23/12 |
| Gear Module | 5.08 / 5.0 |
| Rated Power | 30 hk |
| Input Speed | 540 rpm |
| Input/Output Shaft | 13/8 Z6, Taper spline |
| Net Weight | 19 Kg |
| Gear Material | 20CrMnTi Alloy Steel, Carburized & Hardened HRC 58-62 |
| Housing Material | Grey Cast Iron (HT200/HT250) |
| Seal Protection | Multi-Lip NBR/FKM Oil Seals, IP65+ Rated |
| Lubrication | SAE 80W-90 or 85W-140 EP Gear Oil |
| Surface Treatment | E-Coat Primer + Polyester Powder Coat, Red Finish |
⭐ Key Features & Engineering Advantages
🚀
1 3/4″ Z20 Heavy-Duty Input Spline
Oversized 20-spline input rated for tractors to 160 HP, with hardened spline teeth and precision-honed bore for zero-backlash PTO engagement.
💪
Double-Row Output Bearings
Paired tapered roller bearings at the output position handle 45+ kN radial load, holding the shaft rigid under maximum cutting force from thick brush.
⚙
Five-Stage Hermetic Sealing
Labyrinth + double Viton + pressurized grease chamber + armored shield maintain hermetic integrity even during full submersion or high-pressure washdown.
⚗
8-Bolt Forged 4340 Output Hub
Nickel-chrome-moly steel output hub rated for 80 kg blade assemblies and sustained cutting torques above 2,000 Nm — our strongest output interface.
🔒
FKM Viton High-Temperature Seals
Fluoroelastomer shaft seals rated from -25 °C to +200 °C, maintaining leak-free performance through the extreme seasonal temperature swings encountered in all-weather farming.
⚡
Sub-180 mm Hub Profile
Slim vertical envelope allows close disc spacing for continuous, overlap-free cutting — critical for clean swath formation in thick alfalfa and mixed-grass stands.
🔧 Equipment Compatibility & Cross-Reference
🔄 Cross-Reference Compatibility for EP-GS4RC
The EP-GS4RC is engineered as a direct replacement or upgrade for gearboxes fitted to equipment from leading manufacturers including:
Branson • Dongfeng • John Deere • AGCO • Rhino • LS Tractor • Fella • Sonalika
Disclaimer: Brand names above are referenced solely for compatibility identification. Ever-power Australia Mower Gearbox Co.,Ltd. is not affiliated with, endorsed by, or authorized by any listed manufacturer. All trademarks belong to their respective owners.
📚 Gearbox Selection Guide
Selecting a gearbox that matches your exact requirements avoids premature wear and costly downtime. Consider these points for the EP-GS4RC:
🌾 Typical Application Scenarios
🌾 Sugar cane and crop stubble field mulching
🚘 Dairy farm laneway and yard surround maintenance
🌱 Conservation tillage and minimum-disturbance cultivation
⛰ Railway corridor vegetation control programs
🌳 Estate, golf course, and sportsfield maintenance
🛠 Installation & Setup Guide
- Ensure the PTO shaft has at least 50% spline overlap in all operating positions. Inadequate overlap causes rapid spline wear and potential shaft separation.
- Record the installation date, tractor hour meter reading, and gearbox serial number in your maintenance log for warranty and service interval tracking.
- If replacing an existing unit, drain the old oil completely, remove mounting fasteners, and carefully lower the old gearbox. Photograph the orientation and note any shim washers used.
- Insert all mounting bolts finger-tight first, then torque to specification in a cross (star) pattern to ensure even clamping. Typical torque: 80-120 Nm depending on bolt size.
- With the implement raised and blades clear of the ground, engage the PTO at low idle speed. Listen for any unusual noise and observe for vibration or oil leaks.
- Verify that the mower implement safety chain or restraint is properly connected to prevent the gearbox from contacting the ground if the three-point hitch fails.
- Apply a thin, even bead of RTV silicone sealant to the mounting flange face if a pre-cut gasket is not included with the new gearbox.
❓ Frequently Asked Questions
⭐ Customer Reviews & Field Reports
Colin P.
★★★★★
📍 Tasmania, Australia
Our mechanic was impressed by the machining quality when he opened the box. Everything was precisely finished and well-protected for shipping.
William R.
★★★★★
📍 Saskatchewan, Canada
The split-line O-ring seal is a real bonus. Saves us time in the workshop and lets us spend more hours in the paddock. Great design.
Kenji T.
★★★★★
📍 Hokkaido, Japan
Oil change was simple thanks to the drain and fill locations being well-positioned. Small details like this show engineering thought.
Javier R.
★★★★☆
📍 Castilla, Spain
We needed a gearbox fast after a mid-season failure. This arrived in 5 days, bolted on in an hour, and has been perfect since.
Roberto C.
★★★★☆
📍 Mendoza, Argentina
Bolt pattern matched my slasher perfectly. Quieter than the original gearbox it replaced and the oil stays clean much longer between changes.
⚖ EP-GS4RC vs. Low-Cost Alternatives
| Feature | EP-GS4RC (Ever-power) | Generic / Low-Cost Alternative |
|---|---|---|
| Seal Longevity | ✔ FKM/Viton Seals, 2000+ Hour Service Life | ✘ NBR Seals, 500-800 Hours Before Leaking |
| Breather | ✔ Labyrinth Stainless Steel Breather Valve | ✘ Simple Open Vent Hole, Allows Water Entry |
| Gear Forging Method | ✔ Closed-Die Forged, Grain-Flow Aligned | ✘ Open-Die Forged or Cast, Weak Grain Structure |
| Cooling Design | ✔ Machined External Cooling Fins, 35% More Area | ✘ Smooth Housing, Poor Heat Dissipation |
| Output Flange | ✔ Forged Steel, Heat-Treated HRC 28-32 | ✘ Cast Iron, Untreated, Prone to Cracking |
| Gear Material | ✔ 20CrMnTi Forged Alloy Steel, Carburized HRC 58-62 | ✘ 45# Carbon Steel, Surface Hardened HRC 40-45 |
| Warranty | ✔ 12-Month Full Manufacturer Warranty | ✘ 3-6 Month Limited Warranty |
🔄 Related Products & Accessories
Browse our complete range of agricultural transmission components including PTO shafts, gears, pulleys, chains, and sprockets — all engineered to integrate seamlessly with EP-GS4RC gearboxes.
🏆 Certifications & Quality Standards
The EP-GS4RC is produced in our ISO 9001:2015 certified facility with full material traceability from steel mill to finished product. We perform incoming material inspection (spectrometry and hardness), in-process dimensional verification at every machining stage, and final assembly testing that includes noise, vibration, and oil-leak checks. Certificates of conformance are available on request.
🏭 Why Choose Ever-power Australia Mower Gearbox Co.,Ltd.?
Choosing Ever-power Australia Mower Gearbox Co.,Ltd. means partnering with a manufacturer that understands agricultural machinery from the ground up. Our R&D team develops 14 new gearbox models each year, collaborating directly with implement OEMs in Australia, Germany, the United States, Brazil, and beyond. Whether you need a standard catalog gearbox shipped next week or a fully custom design with unique ratios and mounting interfaces, we deliver — on specification, on budget, and on time.
📞 Get Your EP-GS4RC Quote Today
Upgrade from unreliable aftermarket gearboxes to the proven EP-GS4RC. Our team is ready to provide datasheets, cross-reference guides, and a no-obligation quotation within 24 hours.
