- All
- Product Name
- Product Keyword
- Product Model
- Product Summary
- Product Description
- Multi Field Search
| Quantity: | |
|---|---|
1. Reliable Power Transmission for Roller Travel
The gearbox provides efficient torque transfer from the hydrostatic travel motor to the drive axle, ensuring smooth acceleration and consistent rolling speed. Essential for asphalt compaction, highway paving, and large-scale earthwork projects requiring precise speed control.
2. Compatible with Hamm HD120 Series Rollers
Direct bolt-on replacement for OEM gearbox on Hamm HD120, HD+120, HD120 VV, HD120 VO, HD120I, HD120IVO, and HD120I VV-HV series tandem rollers . Often replaced alongside hydraulic travel motor, drive shaft seals, axle assembly, and vibration gearbox (20306 series) during complete drivetrain service.
3. Heavy-Duty Cast Iron Construction
Manufactured from high-strength cast iron with precision-machined gears and heat-treated shafts for maximum durability. Features tapered roller bearings and high-grade seals to resist oil leakage. For maximum drivetrain reliability, inspect gearbox oil level regularly and replace seals when servicing.
Item | Details |
|---|---|
Part Number | 20305 |
Product Name | Gearbox / Transmission Gearbox |
Brand Compatibility | Hamm |
Fit Models | HD120 / HD+120 / HD120 VV / HD120 VO / HD120I / HD120IVO / HD120I VV-HV |
Weight | 18.5 kg |
Dimensions | 320 × 240 × 210 mm |
Material | High-strength cast iron housing |
Gear Type | Precision-machined helical or spur gears |
Shaft Material | Heat-treated alloy steel |
Bearing Type | Tapered roller bearings |
Function | Speed reduction, torque transfer for travel drive |
Related Parts | Hydraulic Travel Motor, Drive Shaft, Axle Assembly, Vibration Gearbox (20306 series), Mounting Hardware |
Warranty | 1 year |
Installation | Direct bolt-on replacement |
