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EP-CTU3150 Planetary Track Drive Gearbox
Brevini CTU3150 Compatible Replacement | EVER POWER
The EP-CTU3150 is EVER POWER’s precision-built planetary track drive gearbox, engineered as a direct replacement for the Brevini riduttori CTU3150. Delivering 31,500 Nm output torque within a compact, flange-mounted housing, this unit keeps excavators, crawler cranes and track-type construction machines moving reliably in the toughest job-site conditions.
Product Overview
The EP-CTU3150 serves construction, mining, drilling and port-handling industries wherever compact track drives are required. Its sealed, oil-bath lubricated planetary stages provide maintenance-free operation across extended service intervals, while the integrated multi-disc spring brake ensures the machine holds position on slopes whenever the hydraulic motor is de-energised.
Key highlights: 31,500 Nm rated output torque, 2-stage planetary reduction, SAE-B/ISO motor flange, spring-applied failsafe brake, IP68 sealing.
Technical Parameters
| Parameter | Value |
|---|---|
| Model | EP-CTU3150 |
| Replaces | Brevini riduttori CTU3150 |
| Max Output Torque | 31,500 Nm |
| Gear Stages | 2 |
| Ratio Range | 20:1 – 80:1 |
| Max Input Speed | 3,000 rpm |
| Efficiency | >= 96% (per stage) |
| Backlash | <= 10 arcmin |
| Housing Material | Ductile Iron GGG50 |
| Lubrication | Splash / bath (synthetic gear oil) |
| Protection Class | IP68 |
| Operating Temp. | -25 degC to +80 degC |
| Approx. Weight | ~75 kg |
| Brake | Spring-applied multi-disc (hydraulic release) |
Working Principle
The EP-CTU3150 uses a two-stage epicyclic (planetary) arrangement. High-speed, low-torque input from the hydraulic travel motor enters the first-stage sun gear. Multiple planet gears orbit the sun and react against a fixed ring gear, multiplying torque at the first-stage planet carrier. That carrier becomes the input shaft to the second stage, providing a final cumulative reduction of up to 80:1.
The integrated spring-applied, hydraulically released multi-disc brake engages automatically whenever hydraulic pressure is removed – either by operator command or in the event of a system fault – preventing uncontrolled machine movement on gradients.
Core Advantages
| ● High Torque Density 31,500 Nm in a compact flanged body – fits original machine envelope without modification. |
● IP68 Sealed Fully submerged-capable sealing handles deep trench work, river crossings and pressure wash cycles. |
| ● Failsafe Spring Brake Spring-applied brake activates on power loss, satisfying slope-hold requirements on grades up to 35 deg. |
● Long Service Intervals Oil-bath lubrication and sealed housing deliver 2,000+ hour oil change intervals. |
| ● Drop-In Replacement Mounting dimensions match Brevini CTU3150 – no machine frame modification required for retrofit. |
|
Structure and Material Technology
The housing is precision-cast from GGG50 ductile iron and machined to ISO H7 bore tolerances. Planet gears are manufactured from 20CrMnTi case-hardening steel, carburised and ground to DIN 5 accuracy. The output bearing is a crossed-roller slewing ring designed to handle combined axial, radial and moment loads from the track chain and idler tension. All O-ring face seals are NBR/FKM compound, rated for continuous operation in hydraulic oil, muddy water and diesel-contaminated environments.
Typical Application Scenarios
| Industry | Machine Type | Scenario |
|---|---|---|
| Construction | 10-18 t excavator | Track drive for continuous digging cycles on soft and hard ground. |
| Mining | Compact crawler loader | Low-speed high-torque traction in underground hard-rock galleries. |
| Drilling | Tracked rotary drill rig | Self-propel drive on uneven terrain; brake holds rig on slope during drilling. |
| Forestry | Tracked harvester base | High traction torque for soft bog conditions; sealed unit protects against wood chip ingress. |
Selection Guide
- Machine Operating Weight (t) – Determines required drawbar pull and hence output torque.
- Travel Speed (km/h) – Defines required ratio given motor displacement and sprocket pitch diameter.
- Motor Interface – SAE-B, SAE-C, or ISO flange; shaft or spline input.
- Brake Release Pressure – Confirm available hydraulic pressure (typically 20-35 bar).
- Ground Conditions – Wet, abrasive or chemically aggressive environments may need upgraded seal specification.
Need help selecting? Send us your machine specification for a free engineering review.
Brevini CTU3150 vs. EVER POWER EP-CTU3150
Disclaimer: EVER POWER references the Brevini riduttori CTU3150 model number solely to help customers identify a compatible replacement. We do not manufacture or imply affiliation with Brevini. No intellectual property of Brevini is reproduced. Our replacement unit is an independently designed product that is dimensionally and functionally compatible.
| Aspect | Brevini CTU3150 | EVER POWER EP-CTU3150 |
|---|---|---|
| Price | OEM premium (European) | Competitive – 30-45% saving typical |
| Lead Time | 8-16 weeks | 2-5 weeks |
| Mounting Fit | Original design | Direct bolt-in replacement |
| Warranty | 12 months (varies by region) | 18 months standard |
| Customisation | Limited | OEM/ODM available |
EVER POWER also supplies matched hydraulic travel motors to create a complete drop-in track drive assembly. Enquire about our motor packages.
Quality Certifications and Service Commitment
- ISO 9001:2015 certified manufacturing and quality management.
- CE Marking – EU Machinery Directive 2006/42/EC compliant.
- 18-month warranty covering all manufacturing defects from shipment date.
- 48-hour engineering response for field technical issues.
- Spare seal kits and wear parts stocked for rapid dispatch.
Learn more at EVER POWER About Us.
Case Studies – Engineer Field Notes
| Country | Application | Feedback |
|---|---|---|
| Germany | 14 t excavator fleet overhaul – 8 units replacing Brevini CTU3150 | “Bolt-in fit with zero shimming. All 8 units installed in one shift. Running 10 months without issues.” – Fleet Manager, Munich contractor. |
| Australia | Compact crawler drill rig, iron ore mine site | “IP68 sealing handled the daily high-pressure wash routine perfectly. No oil leaks after 6 months.” – Maintenance Supervisor, Pilbara. |
| Brazil | Tracked pipelayer for sugarcane field drainage | “Cost saving over OEM was the primary driver. Quality exceeded expectations. EVER POWER supported us with full dimensional drawings within 24 hours.” – Site Engineer, Mato Grosso. |
Frequently Asked Questions
Q: Is the EP-CTU3150 a genuine Brevini product?
A: No. It is an independently designed EVER POWER product compatible with the Brevini CTU3150. The Brevini model number is used only for cross-reference.
Q: What hydraulic motor displacement is compatible?
A: The SAE-B/C flange accepts most 55-110 cc/rev piston and gear motors. Confirm your motor shaft diameter and key specification at order.
Q: Is the brake spring force adjustable?
A: No – brake spring preload is factory-set per the rated static holding torque. Brake release pressure is adjustable at the machine hydraulic circuit.
Partner With EVER POWER
EVER POWER supports OEM machine builders and maintenance fleets worldwide. Browse our full replacement drive range or contact us now for a quotation. Visit planetary-gear-box.top for the complete portfolio.
