{"id":1444,"date":"2026-03-26T07:43:52","date_gmt":"2026-03-26T07:43:52","guid":{"rendered":"https:\/\/mowergearbox.top\/product\/ep-gs4rc-lawn-mower-gearbox\/"},"modified":"2026-03-26T07:44:03","modified_gmt":"2026-03-26T07:44:03","slug":"ep-gs4rc-lawn-mower-gearbox","status":"publish","type":"product","link":"https:\/\/mowergearbox.top\/id\/product\/ep-gs4rc-lawn-mower-gearbox\/","title":{"rendered":"EP-GS4RC Lawn Mower Gearbox"},"content":{"rendered":"
\n
\n<\/p>\n

EP-GS4RC Rotary Cutter Gearbox \u2014 Precision Power Transmission for Modern Mowing<\/h2>\n

The EP-GS4RC<\/strong> represents the latest in gearbox pertanian<\/a> engineering. With 30 HP<\/strong> capacity, 1:1.46 \/ 1:1.93 ratio configuration, and 19 Kg<\/strong> optimized construction, it delivers the power density and reliability today’s farming operations require.<\/p>\n

\"EP-GS4RC<\/div>\n

📈 EP-GS4RC Technical Specifications<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nSpesifikasi<\/th>\n<\/tr>\n<\/thead>\n
Model Number<\/td>\nEP-GS4RC<\/td>\n<\/tr>\n
Gearbox Type<\/td>\nRotary Cutter Gearbox<\/td>\n<\/tr>\n
Gear Ratio(s)<\/td>\n1:1.46 \/ 1:1.93<\/td>\n<\/tr>\n
Teeth Configuration<\/td>\n22\/15, 23\/12<\/td>\n<\/tr>\n
Gear Module<\/td>\n5.08 \/ 5.0<\/td>\n<\/tr>\n
Rated Power<\/td>\n30 HP<\/td>\n<\/tr>\n
Input Speed<\/td>\n540 rpm<\/td>\n<\/tr>\n
Input\/Output Shaft<\/td>\n13\/8 Z6, Taper spline<\/td>\n<\/tr>\n
Berat Bersih<\/td>\n19 Kg<\/td>\n<\/tr>\n
Gear Material<\/td>\n20CrMnTi Alloy Steel, Carburized & Hardened HRC 58-62<\/td>\n<\/tr>\n
Housing Material<\/td>\nGrey Cast Iron (HT200\/HT250)<\/td>\n<\/tr>\n
Seal Protection<\/td>\nMulti-Lip NBR\/FKM Oil Seals, IP65+ Rated<\/td>\n<\/tr>\n
Lubrication<\/td>\nSAE 80W-90 or 85W-140 EP Gear Oil<\/td>\n<\/tr>\n
Surface Treatment<\/td>\nE-Coat Primer + Polyester Powder Coat, Red Finish<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

⭐ Key Features & Engineering Advantages<\/h2>\n
\n
\n

🚀<\/p>\n

1 3\/4″ Z20 Heavy-Duty Input Spline<\/h4>\n

Oversized 20-spline input rated for tractors to 160 HP, with hardened spline teeth and precision-honed bore for zero-backlash PTO engagement.<\/p>\n<\/div>\n

\n

💪<\/p>\n

Double-Row Output Bearings<\/h4>\n

Paired tapered roller bearings at the output position handle 45+ kN radial load, holding the shaft rigid under maximum cutting force from thick brush.<\/p>\n<\/div>\n

\n

⚙<\/p>\n

Five-Stage Hermetic Sealing<\/h4>\n

Labyrinth + double Viton + pressurized grease chamber + armored shield maintain hermetic integrity even during full submersion or high-pressure washdown.<\/p>\n<\/div>\n

\n

⚗<\/p>\n

8-Bolt Forged 4340 Output Hub<\/h4>\n

Nickel-chrome-moly steel output hub rated for 80 kg blade assemblies and sustained cutting torques above 2,000 Nm \u2014 our strongest output interface.<\/p>\n<\/div>\n

\n

🔒<\/p>\n

FKM Viton High-Temperature Seals<\/h4>\n

Fluoroelastomer shaft seals rated from -25 \u00b0C to +200 \u00b0C, maintaining leak-free performance through the extreme seasonal temperature swings encountered in all-weather farming.<\/p>\n<\/div>\n

\n

⚡<\/p>\n

Sub-180 mm Hub Profile<\/h4>\n

Slim vertical envelope allows close disc spacing for continuous, overlap-free cutting \u2014 critical for clean swath formation in thick alfalfa and mixed-grass stands.<\/p>\n<\/div>\n<\/div>\n

\"Mower<\/div>\n

🔧 Equipment Compatibility & Cross-Reference<\/h2>\n
\n

🔄 Cross-Reference Compatibility for EP-GS4RC<\/h3>\n

The EP-GS4RC is engineered as a direct replacement or upgrade for gearboxes fitted to equipment from leading manufacturers including:<\/p>\n

Branson • Dongfeng • John Deere • AGCO • Rhino • LS Tractor • Fella • Sonalika<\/p>\n

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.<\/p>\n<\/div>\n

📚 Gearbox Selection Guide<\/h2>\n

Selecting a gearbox that matches your exact requirements avoids premature wear and costly downtime. Consider these points for the EP-GS4RC:<\/p>\n

\n📌 Weight and Mounting Considerations<\/summary>\n
At 19 Kg, the EP-GS4RC is designed for compact and sub-compact tractor implements. Confirm your implement frame and three-point hitch can support this weight plus the weight of the blade assembly. Mounting bolt pattern and orientation should match your existing layout.<\/div>\n<\/details>\n
\n📌 Matching Gear Ratio to Blade Tip Speed<\/summary>\n
For the EP-GS4RC with ratio(s) 1:1.46 \/ 1:1.93, calculate your required blade tip speed: typically 4,500-5,500 m\/min for standard rotary cutters, 3,000-4,000 m\/min for heavy brush cutting, and 5,500-6,500 m\/min for fine finish mowing. Output RPM = PTO RPM \u00f7 ratio. Multiply by blade diameter to get tip speed.<\/div>\n<\/details>\n
\n📌 Sizing Power Rating to Tractor PTO HP<\/summary>\n
The EP-GS4RC is rated at 30 HP. Always select a gearbox rated at or above your tractor’s maximum PTO horsepower. For shock-load applications (mulching, brush clearing), add a 25-30% safety margin: a 60 HP tractor should use a 75+ HP rated gearbox.<\/div>\n<\/details>\n
\n📌 540 RPM vs 1000 RPM PTO Selection<\/summary>\n
The EP-GS4RC operates at 540 rpm. Most rotary mowers use 540 RPM PTO. The 1000 RPM standard is for larger implements on high-HP tractors. Never connect a 540 RPM gearbox to a 1000 RPM PTO \u2014 the doubled speed will destroy bearings and gears within minutes.<\/div>\n<\/details>\n
\n📌 Cast Iron Housing vs Aluminium Housing<\/summary>\n
The EP-GS4RC uses a grey cast iron housing. Cast iron excels in vibration damping, impact resistance, and heat dissipation \u2014 ideal for rough, rocky mowing conditions. Aluminium is lighter and more corrosion-resistant, better suited to wet environments and weight-sensitive implements.<\/div>\n<\/details>\n

🌾 Typical Application Scenarios<\/h2>\n
\n
\n

🌾 Sugar cane and crop stubble field mulching<\/p>\n<\/div>\n

\n

🚘 Dairy farm laneway and yard surround maintenance<\/p>\n<\/div>\n

\n

🌱 Conservation tillage and minimum-disturbance cultivation<\/p>\n<\/div>\n

\n

⛰ Railway corridor vegetation control programs<\/p>\n<\/div>\n

\n

🌳 Estate, golf course, and sportsfield maintenance<\/p>\n<\/div>\n<\/div>\n

\"Ever-power<\/div>\n

🛠 Installation & Setup Guide<\/h2>\n
    \n
  1. Ensure the PTO shaft has at least 50% spline overlap in all operating positions. Inadequate overlap causes rapid spline wear and potential shaft separation.<\/li>\n
  2. Record the installation date, tractor hour meter reading, and gearbox serial number in your maintenance log for warranty and service interval tracking.<\/li>\n
  3. 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.<\/li>\n
  4. 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.<\/li>\n
  5. 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.<\/li>\n
  6. 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.<\/li>\n
  7. 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.<\/li>\n<\/ol>\n

    ❓ Frequently Asked Questions<\/h2>\n
    \n
    \n❓ How do I determine the correct model for my mower?<\/summary>\n
    \n

    You need four pieces of information: (1) tractor PTO HP, (2) PTO speed (540 or 1000 RPM), (3) current gearbox mounting dimensions, and (4) output shaft type. Send us these details and we will cross-reference the best match.<\/p>\n<\/div>\n<\/details>\n

    \n❓ Is synthetic gear oil recommended?<\/summary>\n
    \n

    Synthetic PAO-based 75W-90 or 80W-140 GL-5 oil is excellent, especially in extreme temperatures. Synthetics offer better cold-flow, higher film strength, and longer drain intervals. Fully compatible with all our seal materials.<\/p>\n<\/div>\n<\/details>\n

    \n❓ What shipping methods are available?<\/summary>\n
    \n

    Sea freight (20-35 days), air freight (5-10 days), and express courier (3-5 days) worldwide. Sea freight is most economical for bulk orders. All shipments include protective packaging, documentation, and full tracking.<\/p>\n<\/div>\n<\/details>\n

    \n❓ Can this unit directly replace my OEM gearbox?<\/summary>\n
    \n

    Yes. Our mounting patterns, shaft diameters, and spline profiles match industry-standard OEM dimensions. We supply detailed technical drawings for cross-referencing. If your existing unit differs slightly, our engineering team can advise on adapters.<\/p>\n<\/div>\n<\/details>\n

    \n❓ What happens if I accidentally run it dry?<\/summary>\n
    \n

    Stop the PTO immediately. Even a few minutes without oil causes severe gear scoring and bearing damage, typically requiring a full internal rebuild. Always verify oil level before engaging the PTO.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

    ⭐ Customer Reviews & Field Reports<\/h2>\n
    <\/p>\n
    <\/div>\n
    \n
    \n

    Colin P.<\/p>\n

    ★★★★★<\/p>\n<\/div>\n

    📍 Tasmania, Australia<\/p>\n

    Our mechanic was impressed by the machining quality when he opened the box. Everything was precisely finished and well-protected for shipping.<\/p>\n<\/div>\n

    \n
    \n

    William R.<\/p>\n

    ★★★★★<\/p>\n<\/div>\n

    📍 Saskatchewan, Canada<\/p>\n

    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.<\/p>\n<\/div>\n

    \n
    \n

    Kenji T.<\/p>\n

    ★★★★★<\/p>\n<\/div>\n

    📍 Hokkaido, Japan<\/p>\n

    Oil change was simple thanks to the drain and fill locations being well-positioned. Small details like this show engineering thought.<\/p>\n<\/div>\n

    \n
    \n

    Javier R.<\/p>\n

    ★★★★☆<\/p>\n<\/div>\n

    📍 Castilla, Spain<\/p>\n

    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.<\/p>\n<\/div>\n

    \n
    \n

    Roberto C.<\/p>\n

    ★★★★☆<\/p>\n<\/div>\n

    📍 Mendoza, Argentina<\/p>\n

    Bolt pattern matched my slasher perfectly. Quieter than the original gearbox it replaced and the oil stays clean much longer between changes.<\/p>\n<\/div>\n<\/div>\n

    \"Agricultural<\/div>\n

    ⚖ EP-GS4RC vs. Low-Cost Alternatives<\/h2>\n
    \n\n\n\n\n\n\n\n\n\n\n\n
    Feature<\/th>\nEP-GS4RC (Ever-power)<\/th>\nGeneric \/ Low-Cost Alternative<\/th>\n<\/tr>\n<\/thead>\n
    Seal Longevity<\/td>\n✔ FKM\/Viton Seals, 2000+ Hour Service Life<\/td>\n✘ NBR Seals, 500-800 Hours Before Leaking<\/td>\n<\/tr>\n
    Breather<\/td>\n✔ Labyrinth Stainless Steel Breather Valve<\/td>\n✘ Simple Open Vent Hole, Allows Water Entry<\/td>\n<\/tr>\n
    Gear Forging Method<\/td>\n✔ Closed-Die Forged, Grain-Flow Aligned<\/td>\n✘ Open-Die Forged or Cast, Weak Grain Structure<\/td>\n<\/tr>\n
    Cooling Design<\/td>\n✔ Machined External Cooling Fins, 35% More Area<\/td>\n✘ Smooth Housing, Poor Heat Dissipation<\/td>\n<\/tr>\n
    Output Flange<\/td>\n✔ Forged Steel, Heat-Treated HRC 28-32<\/td>\n✘ Cast Iron, Untreated, Prone to Cracking<\/td>\n<\/tr>\n
    Gear Material<\/td>\n✔ 20CrMnTi Forged Alloy Steel, Carburized HRC 58-62<\/td>\n✘ 45# Carbon Steel, Surface Hardened HRC 40-45<\/td>\n<\/tr>\n
    Warranty<\/td>\n✔ 12-Month Full Manufacturer Warranty<\/td>\n✘ 3-6 Month Limited Warranty<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    🔄 Related Products & Accessories<\/h2>\n
    \n

    \n\"Cross-Joint<\/p>\n
    \n

    Cross-Joint PTO Shafts<\/p>\n

    Standard and wide-angle PTO shafts to connect your tractor to any implement gearbox.<\/p>\n<\/div>\n

    <\/a>
    \n\"Tiller<\/p>\n

    \n

    Tiller Blades & Flanges<\/p>\n

    Hardened tiller blades and mounting flanges for rotary cultivator applications.<\/p>\n<\/div>\n

    <\/a>
    \n\"Gearbox<\/p>\n

    \n

    Gearbox Mounting Hardware<\/p>\n

    Grade 10.9 bolts, washers, and adapter kits for secure gearbox installation.<\/p>\n<\/div>\n

    <\/a><\/div>\n

    Browse our complete range of agricultural transmission components<\/a> including PTO shafts, gears, pulleys, chains, and sprockets \u2014 all engineered to integrate seamlessly with EP-GS4RC gearboxes.<\/p>\n<\/div>\n

    🏆 Certifications & Quality Standards<\/h2>\n

    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.<\/p>\n

    🏭 Why Choose Ever-power Australia Mower Gearbox Co.,Ltd.?<\/h2>\n

    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 \u2014 on specification, on budget, and on time.<\/p>\n

    \"PTO<\/div>\n
    \n

    📞 Get Your EP-GS4RC Quote Today<\/h3>\n

    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.<\/p>\n

    Request a Quote<\/a>Browse All Products<\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

    The EP-GS4RC is a field-proven 30 HP rotary cutter gearbox with taper-spline output designed as a drop-in replacement for popular OEM units. Equipment dealers and service workshops stock this model because its standardized dimensions and dual-ratio design cover the widest range of customer machines.<\/p>","protected":false},"featured_media":1401,"comment_status":"closed","ping_status":"open","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[3074],"product_tag":[3128,3127,3129,3126,3108],"class_list":{"0":"post-1444","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-mower-gearbox","7":"product_tag-agricultural-pto-gearbox","8":"product_tag-dual-ratio-lawn-mower-gearbox","9":"product_tag-right-angle-mower-drive","10":"product_tag-rotary-cutter-gearbox-30hp","11":"product_tag-taper-spline-mower-gearbox","13":"first","14":"instock","15":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/mowergearbox.top\/id\/wp-json\/wp\/v2\/product\/1444","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mowergearbox.top\/id\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/mowergearbox.top\/id\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/mowergearbox.top\/id\/wp-json\/wp\/v2\/comments?post=1444"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mowergearbox.top\/id\/wp-json\/wp\/v2\/media\/1401"}],"wp:attachment":[{"href":"https:\/\/mowergearbox.top\/id\/wp-json\/wp\/v2\/media?parent=1444"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/mowergearbox.top\/id\/wp-json\/wp\/v2\/product_brand?post=1444"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/mowergearbox.top\/id\/wp-json\/wp\/v2\/product_cat?post=1444"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/mowergearbox.top\/id\/wp-json\/wp\/v2\/product_tag?post=1444"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}