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| Item | Specification |
|---|---|
| Part Number | 235-5974 (or 2355974) |
| Product Name | Top Roller / Carrier Roller Assembly |
| Product Type | Undercarriage Component |
| Compatible Machine Models | Caterpillar D6R Dozer |
| Roller Type | Top Roller / Carrier Roller (Upper Track) |
| Single Weight | 40 kgs (88.2 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, Land Clearing, Heavy Dozing, Mining Support |
Caterpillar 235-5974 top roller
D6R carrier roller assembly
2355974 top roller
CAT D6R undercarriage parts
40 kg top roller for D6R dozer
Replacement carrier roller for D6R
Caterpillar dozer top roller
The Caterpillar 235-5974 Top Roller Assembly (Carrier Roller) is a genuine OEM-specification undercarriage component designed for the Caterpillar D6R dozer. 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 D6R is a medium-to-large dozer used in construction, land clearing, heavy dozing, 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 (40 kg) | Easier handling during installation |
| D6R Optimized | Specifically engineered for Caterpillar D6R dozer |
| Factory Lubricated | Maintenance-free sealed design |
| Direct OEM Replacement | Guaranteed fit and performance |
| Specification | Detail |
|---|---|
| Machine Model | Caterpillar D6R Dozer |
| Machine Type | Medium-to-Large Dozer |
| Operating Weight | ~18,000 - 20,000 kg |
| Engine Power | ~180-200 HP |
| Position | Top / Upper track (Carrier Roller) |
| Component | Part Number | Description |
|---|---|---|
| Bottom Roller (Single) | 288-0934 | Single flange roller (58 kg) |
| Bottom Roller (Double) | 288-0935 | Double flange roller (53 kg) |
| Idler | — | Front idler assembly |
| Sprocket | — | Drive sprocket |
Position: This is a top/carrier roller - supports the upper track strand
Lifting Note: At 40 kg, proper lifting techniques are recommended
Bolt Torque: Follow Caterpillar 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 | 235-5974 / 2355974 |
| Type | Top Roller / Carrier Roller Assembly |
| Weight | 40 kg per piece |
| Compatibility | Caterpillar D6R Dozer |
| Packaging | Individual box |
Note: This is a top/carrier roller for the Caterpillar D6R dozer. Verify machine serial number and undercarriage configuration before ordering. Due to weight (40 kg), proper lifting techniques are recommended during installation. Regular inspection of carrier rollers is essential for optimal undercarriage performance.
