Cat/4304195/E6015B Carrier Roller/Top Roller Assembly/heavy duty excavator undercarriages manufacture/supplier based in quanzhou China
Product Specifications
Caterpillar E6015B Carrier Roller Assembly: Technical Specification & Functional Analysis
Optimized for Undercarriage Stability, Wear Resistance & Global Compatibility
The Carrier Roller Assembly (commonly termed Top Roller or Upper Roller) is a critical undercarriage component in Caterpillar track-type machinery, designed to support the upper track chain, reduce friction, and maintain track tension during operation. Its structural integrity directly impacts machine stability, fuel efficiency, and service life in mining, construction, and heavy-earthmoving applications
1. Core Function & System Integration
Primary Role:
Guides and supports the upper track chain, preventing lateral displacement and sagging.
Distributes operational loads (up to 40+ tons) across the track frame.
Minimizes frictional heat via sealed lubrication systems during high-speed travel.
Integration with Track System:
Interfaces with track links (AS-SA 2000-grade steel) and sprocket assemblies (forged Mn-steel segments) .
Works synergistically with idlers and track rollers to ensure uniform track alignment.
2. Technical Specifications & Design Parameters
| Parameter | Specification |
|---|---|
| Compatibility | Cat® E6015, E6015B, LD350 excavators |
| Part Number | 430-4195 |
| Weight | 85–95 kg |
| Bore Diameter | 60–70 mm |
| Dynamic Load Rating | ≥120 kN (tapered roller bearings) |
| Seal System | Triple-lip + labyrinth (IP69K-rated) |
| Material | Forged alloy steel (Mn16/Mn18), induction-hardened to 55–60 HRC |
3. Structural Breakdown & Material Science
Roller Shell:
Construction: Monobloc forging (ISO 4957:2018 standard) with groove profiles matching track chain pitch.
Surface Treatment: Induction hardening (depth: 5–8 mm) + shot peening for abrasion resistance in silica/slurry environments.
Shaft & Mounting Flange:
Shaft: High-tensile 42CrMo4 steel (ISO 10.9 grade), cold-rolled for fatigue resistance.
Flange: Reinforced weld-on design with anti-corrosion coating (zinc-nickel electroplating).
Bearing System:
Type: Tapered roller bearings (Timken®/NSK series).
Lubrication: Lithium-complex grease (ISO-LXEPH2 grade) with 500-hour service intervals.
Sealing Technology:
Primary triple-lip seal (NOK/Parker) + secondary labyrinth seal + dust excluder .
Validated for submersion up to 1.5 m (MIL-S-45180D standard).
4. Failure Modes & Maintenance Protocol
Common Failure Symptoms:
Wobbling (>3 mm radial play): Indicates bearing spalling or seal breach.
Oil leakage: Seal degradation due to grit ingress or thermal cracking.
Flat spots/Scoring: Hard particle contamination or misalignment.
Service Life:
Standard: 6,000–8,000 hours (varies with operating conditions; e.g., abrasive terrains reduce lifespan by 30–40%).
Preventive Maintenance:
Biweekly: Clean debris from seal grooves using low-pressure steam.
Biannual: Replenish grease via Zerk fittings; inspect for seal lip tears.
Annual: Measure roller OD wear – replace if wear exceeds 8% of original diameter.
5. Global Procurement & Compatibility Guidance
| Source Type | Key Suppliers | Regional Logistics |
|---|---|---|
| OEM (Caterpillar) | - Part Number: E6015B (verify via SIS® portal) - Warranty: 12 months global - Traceability: Blockchain Digital Parts Passport | NA/EU: 3–5 days (dealer stock) APAC: 7–10 days (Singapore hub) |
| Aftermarket | - Fujian Quanyu (China): ISO 9001-certified Mn-steel forgings - Komatsu Group (India): RoHS-compliant, 30% cost savings vs. OEM | FOB China: MOQ 10 units, 15–30-day lead Sea freight to major ports (DDP option) |
6. Critical Compatibility Notes
Model-Specific Validation:
Confirm E6015B suffix alignment for post-2010 machines (e.g., D6T Phase III uses E6015B; Phase II uses obsolete 1U-5701).
Cross-reference via equipment serial number on Cat® SIS 2.0.
Counterfeit Mitigation:
Genuine parts feature laser-etched 12-digit security codes + QR traceability.
Demand material certs (EN 10204 3.1) for aftermarket purchases.
