Dynapac CA702D Spare Parts 4812119699 Pump 4700390920 Travel Gearbox
Wuhan Xinlaifu Hydraulic Equipment Co., Ltd. is one of the leading manufacturers and suppliers of dynapac ca702d spare parts 4812119699 pump 4700390920 travel gearbox in China. With abundant experience, we warmly welcome you to buy high quality customized products at competitive price from our factory. Also, OEM&ODM service is available.
Specifications
| Type | 4700390920 Planetary Travel Gearbox for Dynapac CA702D |
| Brand | XLF Hydraulic |
| Max Output Torque Range | 24000 N.m |
| Rated Working Pressure | 30 MPa (300 bar) |
| Peak Pressure | Max 35 MPa (350 bar) |
| Mount Flange | OEM Matching Flange Fit CA702D Drum Drive |
| Port Size | SAE Standard Hydraulic Interface |
| Built-in Parts | Integrated Parking Brake, Hardened Planetary Gear Set, Oil Seals |
| Recommended Oil | ISO VG68 Heavy-Duty Gear Oil / Anti-Wear Hydraulic Oil |
Product Overview
Part No.4700390920 is a heavy-duty coaxial planetary travel gearbox exclusively engineered as OEM replacement component for Dynapac CA702D single-drum vibratory soil compactor. Custom modifications and tailored part coding are supported to match diverse working demands, covering multiple hydraulic port layouts, customized mounting flanges, reinforced sealing assemblies and load-adaptive gear transmission structures. It adopts high-hardness carburized planetary gear sets, heavy-duty roller bearings and integrated multi-lip oil seal modules to sustain stable output under continuous heavy torque and frequent impact loads during compaction operations. This aftermarket travel reducer delivers fully interchangeable performance with factory original units, featuring 1:1 matched overall dimensions, hydraulic interface positions, drum mounting flange and input spline parameters for direct drop-in installation without extra machining or pipe modification.
The 4700390920 planetary travel gearbox is a high-torque compact drive unit built for heavy compaction machinery, delivering steady traction output to drive the front compaction drum of CA702D (front drum load up to 17200kg). Its matched hydraulic drive system supports a rated working pressure of 300 bar, with peak intermittent pressure reaching 350 bar, perfectly coping with long-hour continuous heavy-load construction cycles. Widely deployed in harsh large-scale compaction projects including highway subgrades, rock-fill dams, airport runways and port earthworks, this gearbox boasts outstanding shock resistance and extended service life under sustained vibration and heavy static loads. As the core traction transmission component of Dynapac CA702D 26.9-ton soil roller, it is constructed with one-piece high-strength cast housing, reinforced heavy-load output bearings and integrated hydraulic parking brake assembly, fully resisting frequent high-pressure surges and persistent mechanical vibration to fit the extreme working environment of large road compaction equipment.
This 4700390920 travel reducer series provides abundant customized structural variants, including custom input spline profiles, reinforced heavy-duty seal kits, extended output hubs and modified brake valve connections, specially designed to pair with the matched 4812119699 main hydraulic pump of CA702D. Customized versions can eliminate redundant transition connectors, enabling seamless direct assembly with the machine's travel hydraulic motor via dedicated spline and port matching designs. It is the optimal drive transmission solution for heavy-duty single-drum compactors with limited front drum installation space, or large soil rollers adopting integrated modular chassis design for highway, water conservancy and airport infrastructure construction.
Core Advantages
1. Optimized Structural & Modular Design – For Dynapac CA702D Travel Drive System
Part No.4700390920 Planetary Travel Gearbox adopts reinforced modular heavy-duty structure, specially developed as OEM replacement travel transmission unit for Dynapac CA702D single drum vibratory compactor: High-torque planetary reduction structure: Equipped with carburized hardened planetary gear set and heavy-duty roller bearing group, this gearbox outputs stable high traction torque to drive compaction drum. It withstands persistent alternating heavy loads and construction vibration, keeping the roller travel hydraulic system running smoothly and synchronously during long-hour road compaction work. Perfect matched with CA702D travel hydraulic assembly: This 4700390920 reducer directly pairs with the matched 4812119699 main hydraulic pump and travel motor of CA702D, without extra transition adapters. It is fully compatible with the original machine's closed travel drive circuit for soil, asphalt and airport base compaction projects. Compact integrated cast housing: Optimized coaxial planetary layout and one-piece reinforced cast housing remove redundant intermediate structures, minimizing overall installation volume. The narrow compact outline fits the limited mounting space at CA702D front steel drum assembly. Plug-and-play installation & flexible matching design: Manufactured with 1:1 OEM original mounting flange, precise bolt hole layout and standard input spline, the gearbox aligns perfectly with the machine's travel motor output end and keeps stable transmission concentricity under high-load operation. The standardized modular structure supports independent single-unit replacement, convenient for maintenance and overhaul of Dynapac CA702D compaction equipment.
2. 4700390920 Travel Gearbox – High Torque Planetary Reducer For Dynapac CA702D Compactor
4700390920 planetary travel gearbox is a high-efficiency heavy-load traction reducer customized for road roller travel drive system, supplying reliable high torque power for Dynapac CA702D large single-drum compactor: High torque density & stable pressure bearing capacity: Adopting multi-stage planetary reduction design inside robust cast housing, this reducer bears continuous rated working pressure up to 300 bar and intermittent peak pressure of 350 bar, delivering sufficient traction torque to support CA702D full-load compaction and slope climbing operations. Reinforced gear & heavy load housing assembly: Built with fully carburized quenched planetary gears, thickened output hub and high load capacity bearings, the gearbox maintains high transmission efficiency under long-term heavy impact loads. It features strong anti-shock performance and structural rigidity to handle frequent load changes during compaction construction. Precision gear fit & reliable multi-lip sealing system: Fine ground gear tooth surfaces lower friction loss and extend service life under continuous operation. Equipped with double-layer FKM oil seals and dust-proof rings, the unit effectively blocks mud, gravel, rainwater and hydraulic oil leakage on construction sites. Excellent durability for severe construction environments: It runs steadily under constant heavy torque and alternating loads, adapting to ambient temperature range -20°C ~ +50°C. Resistant to intense vibration, heavy dust and muddy road conditions, it serves as core drive component for highway, dam and airport foundation compaction equipment, providing stable performance in all harsh infrastructure job sites.
Q: What machine does the 4700390920 travel gearbox fit?
A: This OEM part 4700390920 is exclusively compatible with Dynapac CA702D single drum vibratory roller. It serves as the front drum travel drive reducer for heavy-duty soil and base compaction machines.
Q: Is this 4700390920 gearbox a direct drop-in replacement for the original unit?
A: Yes. All mounting flanges, input splines, bolt hole positions and hydraulic interface dimensions are 1:1 OEM matched. No cutting, welding or modification is needed for direct replacement.
Q: What is the working pressure and torque rating of this CA702D travel gearbox?
A: It supports 300 bar rated working pressure and 350 bar peak pressure, with high torque output designed to handle full-load compaction, climbing and continuous vibration working conditions of Dynapac CA702D roller.
Q: Which hydraulic pump matches the 4700390920 travel gearbox?
A: It perfectly matches the 4812119699 main hydraulic pump of Dynapac CA702D. The pump and gearbox form the complete original travel hydraulic drive system for synchronized drum driving performance.
Q: Does this gearbox come with a built-in parking brake?
A: Yes. The 4700390920 travel reducer is integrated with a hydraulic parking brake system, which meets the original machine's braking and safety locking requirements during slope and static parking.
Q: Can you provide customized splines, seals or flange specifications?
A: Yes. Custom input spline profiles, reinforced FKM sealing kits, output hub structures and port adaptations are available to meet special installation and harsh construction demands.
Q: What lubricating oil is recommended for the 4700390920 gearbox? What is the maintenance cycle?
A: Use ISO VG68 heavy-duty gear oil or anti-wear hydraulic oil. First oil change after 200 working hours; routine inspection of seals and bolt tightness every 500 hours; full oil replacement every 2000 working hours.
Q: How to solve common gearbox oil leakage and heating issues?
A: First retighten flange and oil circuit bolts. If leakage continues, replace the matched professional seal kit. Overheating is usually caused by insufficient oil or oil deterioration; replace oil and check internal gear wear in time. Private disassembly of internal gear components is not recommended.
Q: What is the warranty policy for this Dynapac CA702D travel gearbox?
A: We provide 12-month factory warranty. Free technical support and replacement parts are offered for non-human damage under normal installation and working conditions.
Main Specifications
Technical Datasheet
Part Number: 4700390920 Two-Stage Planetary Travel Drum Gearbox Compatible Equipment: Dynapac CA702D Single Drum Vibratory Compactor Aftermarket OEM Replacement Component Manufacturer: XLF Hydraulic Version: V1.0 Release Date: June 2026
Product Overview
Product Introduction
4700390920 heavy-duty coaxial planetary travel gearbox is specially developed as a direct OEM replacement drive unit for Dynapac CA702D large soil compactor, installed on the front steel drum drive assembly. It integrates a hydraulic failsafe multi-disc parking brake to bear the full traction load of the 17200kg front compaction drum.
This reducer perfectly matches the supporting main hydraulic pump P/N 4812119699, forming the complete closed hydrostatic travel drive system of CA702D roller. All mounting outlines, input spline parameters, hydraulic port layout and bolt hole positions are 1:1 duplicated with the original factory component, supporting plug-and-play installation without cutting, welding or pipeline modification during maintenance.
Main Application Scenarios
Highway subgrade & asphalt base compaction
Earth-rock fill dam & water conservancy construction
Airport runway, port yard and large industrial foundation compaction
Heavy municipal road engineering projects
Full Technical Parameter Table
| Item | Technical Specification |
|---|---|
| OEM Part No. | 4700390920 |
| Matching Machine | Dynapac CA702D Single Drum Vibratory Roller |
| Internal Structure | Two-Stage Coaxial Planetary Reduction Drive |
| Max Continuous Output Torque | 24,000 N·m |
| Max Allowable Input Speed | 4,000 rpm |
| Standard Reduction Ratio | 32.6 (Custom ratios 27 / 38 / 46 available) |
| Rated Hydraulic Working Pressure | 30 MPa (300 bar) |
| Intermittent Peak Pressure | 35 MPa (350 bar) |
| Dynamic Bearing Load Capacity | 140 kN |
| Static Bearing Load Capacity | 290 kN |
| Built-in Brake Unit | Hydraulically Released Multi-Disc Failsafe Parking Brake |
| Input Connection | Standard spline interface matched with CA702D travel hydraulic motor |
| Mounting Flange | OEM identical drum drive flange, fully interchangeable |
| Hydraulic Ports | SAE standard ports for drive circuit & brake control circuit |
| Gear Material | Carburized quenched alloy steel, high hardness & wear resistance |
| Sealing System | Double-layer FKM multi-lip oil seals + external dust-proof shield |
| Recommended Lubricant | ISO VG68 Heavy-Duty Gear Oil / Anti-Wear Hydraulic Oil |
| Operating Ambient Temperature | -20 ℃ ~ +50 ℃ |
| Matched Supporting Pump | P/N 4812119699 Axial Piston Main Pump for Dynapac CA702D |
| Design Service Life | ≥8000 working hours under rated full load |
| Factory Warranty Term | 12 months after shipment delivery |
Structural & Performance Advantages
Reinforced Two-Stage Planetary Transmission Equipped with precision carburized planetary gear set and thickened heavy-load roller bearings, it greatly improves shock resistance and bearing capacity to adapt long-hour continuous compaction vibration and 45% max grade climbing operation of CA702D roller.
Integrated Hydraulic Failsafe Parking Brake Built-in multi-disc parking brake assembly, automatically locks the steel drum once hydraulic pressure drops, fully complies with Dynapac original safety standards for slope parking and emergency shutdown.
1:1 OEM Interchangeable Installation Interface Whole housing outline, mounting bolt positions, input spline and hydraulic port layout are consistent with original 4700390920 unit. No mechanical modification is required during replacement maintenance.
Heavy-Duty Dustproof & Anti-Leak Sealing Structure Premium FKM oil seal plus external dust shield effectively isolate construction site mud, gravel splash and rainwater penetration, avoiding internal oil leakage and gear corrosion failure.
Compact Integrated Cast Housing One-piece high-strength cast iron housing removes redundant intermediate connectors, saving limited installation space inside the narrow front drum assembly of CA702D compactor.
Lubrication & Maintenance Guide
Standard Lubrication Cycle
First oil replacement: After 200 working hours of new gearbox operation
Routine inspection: Check oil level, seal leakage and bolt tightness every 500 working hours
Full oil drain & replacement: Every 2000 working hours
Oil Level Inspection Operation Steps
Park the compactor on horizontal ground, adjust gearbox filler plug to vertical upward position
Loosen the level plug; standard oil level should reach the lower edge of level plug hole
Add ISO VG68 gear oil if oil level is insufficient, retighten all plugs after maintenance completion
Common Fault Troubleshooting
Gearbox oil leakage: Retighten flange and pipeline bolts first; replace matched dedicated seal kit if leakage persists. Private disassembly of internal planetary gear components is forbidden.
Abnormal overheating during operation: Caused by insufficient lubricant or deteriorated oil; replace gear oil immediately and inspect internal gear abrasion condition.
Weak traction & slipping output: Inspect brake hydraulic pressure and internal gear tooth wear; contact technical support for professional disassembly inspection.
Ordering Information
Order Confirmation Tips
Confirm target machine model: Dynapac CA702D Single Drum Compactor
Confirm core part number: 4700390920
Optional custom items: Special input spline, reinforced heavy-duty seal kit, customized reduction ratio
Matching Supporting Spare Parts
Main Hydraulic Pump: 4812119699
Gearbox Repair Seal Kit: Custom matched seal set for 4700390920
Recommended Lubricant Oil: ISO VG68 Heavy-Duty Gear Oil
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