Description
Overview:
This Input Primary Shaft Bearing is used in manual gearboxes on Terex, Thwaites, and Benford site dumpers. It supports the gearbox input/primary shaft, keeping the shaft aligned while carrying combined radial and axial loads from the clutch and gear train. By maintaining accurate running clearance, it helps reduce noise, heat, and wear, and supports smooth gear engagement. The bearing uses hardened bearing steel with precision-ground raceways and caged rolling elements for consistent performance under typical site conditions. Suitable for all Terex, Thwaites, Benford dumpers where the gearbox requires this bearing size; always confirm dimensions from the original part. Genuine status not specified; supplied as a compatible replacement part. Alternate reference 4477 is provided for cross-checking during identification.
Key Features:
- Purpose: supports manual gearbox input/primary shaft in site dumpers
- Function: maintains shaft alignment under radial and axial loads
- Material: hardened bearing steel races with precision-ground raceways
- Caged rolling elements for smooth rotation and stable running clearance
- Optimised for oil-bath lubrication inside manual gearboxes
- Suitable for Terex, Thwaites, and Benford dumper transmissions
- Direct replacement; match dimensions to original before installation
- Requires correct interference fits as specified in service manuals
- Heat-treated construction supports continuous operation and load cycles
- Alternate reference: part number 4477 for cross-checking
- Compatible replacement; Genuine status not specified by supplier
- Measure inner diameter, outer diameter, and width to confirm fit
Typical Applications:
Used at the gearbox input end of Terex, Thwaites, and Benford site dumpers to support the primary shaft. Common during gearbox overhauls when tackling noise, vibration, roughness, or end float. Ensures correct shaft alignment, stable gear meshing, and dependable service in stop–start site work and road travel between jobs.
Also known as:
Input shaft bearing, primary shaft bearing, mainshaft front bearing, gearbox input bearing, front mainshaft bearing, transmission input bearing.
Alternate Part Numbers:
4477
Product Specifications
| L&S Part No. | 4477 |
|---|---|
| Unit of Sale | 1 |
| Machine Type | Dumpers |
| Fits Brands | Terex, Thwaites, Benford |
| Key Features | - Input primary shaft bearing for manual gearboxes. - Fits Terex, Thwaites and Benford dumpers. - Replaces worn or damaged input shaft bearing. - Supports and locates the gearbox input shaft. - Suitable for routine transmission maintenance and overhauls. |
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