Описание
EP-CTD3300 Planetary Track Drive Gearbox ?? 33,000 Nm
Brevini CTD3300 Compatible Replacement | EVER POWER
The EP-CTD3300 delivers 33,000 Nm output torque with an optionally available dual-speed function built directly into the gearbox body ?? replacing the need for a costly separate two-speed motor. Engineered to replace the Brevini riduttori CTD3300, this unit is specified by machine designers who need one track drive unit to serve both high-torque work mode and faster tramming mode on 30-40 t class equipment.
Product Overview
The EP-CTD3300 serves 30-40 t hydraulic excavators, large tracked road headers, heavy crawler-mounted pile drivers and large-format tracked agricultural machines. The gearbox-integrated dual-speed mechanism hydraulically engages or bypasses the third planetary stage, providing a torque-biased low speed for work and a higher speed for travel ?? all controlled by the machine’s existing travel control valve without additional hydraulic circuit hardware.
Technical Parameters
| Parameter | Value |
|---|---|
| Model | EP-CTD3300 |
| Replaces | Brevini riduttori CTD3300 |
| Max Output Torque | 33,000 Nm |
| Gear Stages | 3 |
| Dual-Speed | Optional hydraulic ratio change |
| Ratio Range | 30:1 – 160:1 |
| Max Input Speed | 2,400 rpm |
| Continuous Thermal Limit | 48 kW |
| Housing Material | Ductile Iron GGG50, epoxy-chromate coated |
| Lubrication | Synthetic ISO VG 220 (factory filled) |
| Protection Class | IP68 |
| Operating Temp. | -30 degC to +85 degC |
| Approx. Weight | ~98 kg |
| Brake | Spring multi-disc / hydraulic release |
Working Principle
In single-speed configuration, the three planetary stages operate in series providing the full 160:1 ratio at maximum torque. In dual-speed configuration, a hydraulically actuated clutch pack inside the stage-3 housing engages or disengages stage 3 independently. When stage 3 is disengaged (bridged), the unit outputs at the 2-stage ratio ?? approximately 2.5x faster than the 3-stage ratio ?? allowing the machine to tramp to the next work position quickly before re-engaging stage 3 for work.
The dual-speed clutch pack uses sintered metal friction discs rated for 50,000 engagement cycles, managed by a solenoid valve on the machine travel circuit. Speed changes occur smoothly under load at walking pace.
Core Advantages
|
◼ Gearbox-Integrated Dual Speed
No separate two-speed motor required ?? saves cost, weight and hydraulic circuit complexity. |
◼ 50,000-Cycle Clutch Pack
Sintered metal discs rated for 50,000 speed changes ?? suits high-frequency dual-speed operation. |
|
◼ 33,000 Nm High Torque
Handles the highest torque demands of 30-40 t class machines in single-speed work mode. |
◼ Epoxy-Chromate Coating
500-hour salt spray rated external coating for extended outdoor storage and harsh site conditions. |
|
◼ Direct CTD3300 Drop-In
Matching flange and port layout ?? installs in the original Brevini housing pocket without modification. |
Structure and Material Technology
The housing is cast from GGG50 ductile iron and externally coated with epoxy-chromate primer + polyurethane topcoat (500-hour salt spray). The dual-speed clutch housing is a separate bolted module that can be removed and serviced independently without disturbing the main gear train. All planet gears use 17CrNiMo6 carburised steel ground to DIN 5. The output bearing is a large-bore taper roller pair pre-loaded at the factory to prevent axial play under the combined sprocket and chain loads of a 35 t class excavator.
Typical Application Scenarios
| Industry | Machine / Use | Key Requirement |
|---|---|---|
| Earthmoving | 35 t excavator, quarry bench | Low speed for bench digging; high speed for 200 m cross-quarry trams between benches. |
| Mining | Crawler road header, coal mine drift | Slow precise cutting advance; faster speed for repositioning between cuts. |
| Piling | Tracked hydraulic piling rig | Low speed for precise pile position; faster tramming between pile locations on large sites. |
| Agriculture | Large tracked field cultivator | Low speed for field work; higher speed for road travel between fields. |
Selection Guide
- Dual Speed Required? ?? Confirm if machine needs two distinct travel speed ranges; standard single-speed available at lower cost.
- Ratio Selection ?? State required low speed and high speed; EVER POWER will confirm stage 2/3-stage ratios.
- Clutch Engagement Frequency ?? For high-frequency dual-speed (> 30 changes/hour) specify heavy-duty clutch disc set.
- Ambient Temperature ?? Below -25 degC: specify Arctic oil and seal grade.
- Motor Flange ?? Provide hydraulic motor model for direct shaft and flange confirmation.
Contact our engineers for dual-speed ratio optimisation.
Brevini CTD3300 vs. EVER POWER EP-CTD3300
Important Notice: EVER POWER references the Brevini riduttori CTD3300 model number solely to assist customers in identifying a compatible replacement. We do not manufacture, sell, or claim any affiliation with Brevini riduttori. No trademarks or intellectual property of Brevini are reproduced. The EP-CTD3300 is an independently designed and manufactured product that is dimensionally and functionally compatible.
| Aspect | Brevini CTD3300 | EVER POWER EP-CTD3300 |
|---|---|---|
| Price | High OEM rate | Competitive alternative |
| Lead Time | 10-18 weeks | 3-6 weeks |
| Dual-Speed | Available at premium | Standard catalogue option |
| Clutch Life | Standard | 50,000-cycle sintered disc |
| Warranty | 12 months | 18 months |
Matched travel motors for EP-CTD3300 single and dual-speed configurations available from EVER POWER. Request a complete drive system quotation.
Quality Certifications and Service Commitment
- ISO 9001:2015 ?? Dual-speed clutch assembly tested and documented per unit.
- CE Marking ?? Machinery Directive 2006/42/EC.
- 18-month warranty from dispatch ?? includes dual-speed clutch pack.
- Spare clutch disc sets stocked for priority dispatch.
More at EVER POWER About Us.
Case Studies ?? Engineer Field Notes
| Country | Application | Customer Feedback |
|---|---|---|
| Russia | 35 t excavator, Siberian coal open cast, dual-speed | “The tram time between benches dropped by 35% after installing the dual-speed units. Fuel consumption fell accordingly. Huge productivity gain.” ?? Mine Equipment Director, Kemerovo. |
| USA | Tracked hydraulic piling rig, Texas infrastructure project | “Moving a piling rig 50 m between piles at low speed costs 20 minutes. With dual-speed it takes 6 minutes. On a project with 400 piles, that adds up.” ?? Project Manager, Houston. |
| France | Large tracked field cultivator, grain farm | “Road speed between parcels is important for our operator’s working day. The dual-speed gearbox gave us a compliant road travel speed without a separate motor swap.” ?? Farm Machinery Manager, Beauce. |
Frequently Asked Questions
Q: Can the dual-speed module be added to a standard single-speed unit already on the machine?
A: No. The dual-speed module requires a specific housing boss and internal bore. It must be specified at order. Field addition is not feasible.
Q: What happens if the dual-speed solenoid valve fails?
A: On solenoid failure the clutch defaults to the low-speed (full 3-stage) mode ?? the machine can still travel and work safely, only without the fast travel function.
Q: Is the clutch module separately serviceable?
A: Yes. The dual-speed clutch module is bolted to the main housing and can be removed without disturbing the gear train. A spare clutch set can be fitted in approximately 3-4 hours.
Partner With EVER POWER
EVER POWER delivers track drive solutions from compact mini-excavators to the largest mining machines. See our full replacement range or contact us for a quotation. Homepage: planetary-gear-box.top.
