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| Item | Specification |
|---|---|
| Part Number | 6031611 |
| Alternative Part Number | 603-1611 |
| Product Name | Top Roller / Carrier Roller Assembly |
| Product Type | Undercarriage Component |
| Compatible Machine Models | SEM 816D Bulldozer / Tractor |
| Roller Type | Top Roller / Carrier Roller (Upper Track) |
| Single Weight | 38 kgs (83.8 lbs) |
| Material | High-strength alloy steel with induction-hardened wear surface |
| Sealing Type | Floating / Duo-cone seals for contamination protection |
| Application | Supports and guides the track chain in the upper section of the undercarriage |
| Industry Focus | Construction, Earthmoving, Land Clearing, Mining Support |
SEM 6031611 top roller
816D carrier roller assembly
603-1611 top roller
SEM 816D undercarriage parts
38 kg top roller for SEM 816D dozer
Replacement carrier roller for SEM 816D
SEM bulldozer top roller
816D upper track roller
The SEM 6031611 Top Roller Assembly (Carrier Roller) is a genuine OEM-specification undercarriage component designed for the SEM 816D bulldozer/tractor. This top roller (carrier roller) supports the upper strand of the track chain, reducing track sag and ensuring proper alignment between the drive sprocket and idler.
The SEM 816D is a medium-to-large bulldozer used in construction, earthmoving, land clearing, and mining support applications. This carrier roller is manufactured from high-strength alloy steel with induction-hardened tread surfaces for maximum wear resistance.
| Feature | Benefit |
|---|---|
| Top Roller / Carrier Design | Supports upper track chain, reducing sag and vibration |
| Induction-Hardened Tread Surface | Exceptional wear resistance in abrasive conditions |
| Floating / Duo-Cone Seals | Advanced sealing prevents contamination and retains lubrication |
| Precision Bearings | Smooth rotation with minimal friction for extended service life |
| Lightweight Construction (38 kg) | Easier handling during installation |
| 816D Optimized | Specifically engineered for SEM 816D bulldozer |
| Factory Lubricated | Maintenance-free sealed design |
| Direct OEM Replacement | Guaranteed fit and performance |
| Specification | Detail |
|---|---|
| Machine Model | SEM 816D Bulldozer / Tractor |
| Machine Type | Medium-to-Large Bulldozer |
| Position | Top / Upper track (Carrier Roller) |
| Application | Construction, earthmoving, land clearing |
| Component | Part Number | Description |
|---|---|---|
| Track Assembly | 5439475 | Complete track assembly (1,388 kg, 37 links) |
| Idler | 6031613 | Front idler assembly (210 kg) |
| Bottom Roller (Single Flange) | 6031609 | Track roller (53 kg) |
| Bottom Roller (Double Flange) | 6031610 | Track roller (58 kg) |
| Sprocket | — | Drive sprocket |
Position: This is a top/carrier roller - supports the upper track strand
Lifting Note: At 38 kg, proper lifting techniques are recommended
Bolt Torque: Follow SEM OEM specifications for mounting bolt torque
Regular Inspection: Check for seal damage, bearing wear, and tread wear periodically
Lubrication: Factory-sealed; no field lubrication required
Replacement: Replace when tread wear exceeds OEM specifications or when seal failure occurs
| Condition | Action |
|---|---|
| New tread - smooth rotation | Normal operation |
| Moderate tread wear | Monitor regularly |
| Excessive tread wear (flat spots) | Replace roller |
| Seal leakage | Replace roller immediately |
| Bearing noise/play | Replace roller |
| Item | Detail |
|---|---|
| Part Number | 6031611 / 603-1611 |
| Type | Top Roller / Carrier Roller Assembly |
| Weight | 38 kg per piece |
| Compatibility | SEM 816D Bulldozer / Tractor |
| Packaging | Individual box |
Note: This is a top/carrier roller for the SEM 816D bulldozer. Verify machine serial number and undercarriage configuration before ordering. Due to weight (38 kg), proper lifting techniques are recommended during installation. Regular inspection of carrier rollers is essential for optimal undercarriage performance.
