Caterpillar excavator EC55/140/220/210/29 guide wheels, guide wheels, traveling tensioning wheels
Price:
US 80~150
MOQ:
100PCS
Delivery Time:
20~25Days
Brand:
Caterpillar
Product Description
Caterpillar Excavator EC55/140/220/210/29 Guide Wheels
Product Specifications
| Attribute | Value |
|---|---|
| Material | High-strength alloy cast steel |
| Color | Black and Yellow |
| Warranty Time | 2000 Hour |
| Key Words | Excavator Front Idler, Idler Assy, guide wheels |
| Finish | Smooth |
| Package | Export wooden pallet |
| OEM Part No. | 8Y-0721 |
Product Overview
The Caterpillar E55 excavator guide wheel is a precision-engineered chassis component constructed from high-strength wear-resistant cast steel. Its critical flange surfaces undergo quenching and hardening processes for enhanced durability. This component plays a vital role in guiding and restricting the track chain while ensuring low-resistance rotation through its internal bearing/bushing system and lubrication channels.
Compatibility & Identification
| Parameter | Specification |
|---|---|
| Machine Model | Caterpillar E55 Mini Excavator |
| OEM Part No. | 8Y-0721 |
| Aftermarket References | ITR: GU1001 • Berco: 30500721 • Link-Belt: 3050-0721 |
| Function | Guides upper track chain, maintains tension & alignment, absorbs operational shock |
Material & Construction
- Core Material: High-tensile cast steel (Grade ZG340-550, yield strength ≥550 MPa)
- Wheel Rim: Induction-hardened surface (HRC 55-60), wear depth ≥5 mm
- Bearing System: Sealed needle roller bearings (DIN 5402) or Bronze bushings (CuSn8P, oil-impregnated)
- Sealing: Dual-lip steel-case seals + Nitrile O-rings (IP68-rated, -30°C to 120°C)
- Lubrication: Central grease nipple (1/4" NPT), accepts lithium-complex grease
Dimensional Specifications
| Dimension | Value (mm) | Tolerance |
|---|---|---|
| Outer Diameter (Rim) | 295 | ±0.5 |
| Total Width (w/ flanges) | 118 | ±0.3 |
| Rim Gauge Width | 98 | ±0.2 |
| Bore Diameter (Shaft hole) | 70 | +0.02 / -0 |
| Mounting Bolt Holes | 2 × Ø18 | H11 |
| Bolt Circle Diameter (PCD) | 120 | ±0.1 |
| Net Weight | 20.5 kg | - |
Performance & Durability
- Load Capacity: Static: 8,000 kg • Dynamic shock load: 15 kN (ISO 5683 compliant)
- Service Life: Standard conditions: 3,000-5,000 hrs • Severe conditions: ≤1,500 hrs
- Operating Temperature: -40°C to +80°C (ambient)
Maintenance Guidelines
- Lubrication Interval: Normal: 50 hrs (150g grease) • Severe: 20 hrs
- Wear Limits: Rim thickness wear >10% requires replacement • Flange height
- Track Tension: Maintain 30-50 mm sag (mid-span between carriers)
OEM vs. Aftermarket Guidance
- Genuine CAT Identification: Laser-etched p/n 8Y-0721 + CAT logo on casting
- Aftermarket Selection: Require material certification and ISO 9001-certified manufacturers
- Risk Alert: Non-genuine idlers may cause premature seal failure and track misalignment
Important Note: When purchasing replacement parts, provide the exact model, serial number of the device or the part number on the old guide wheel to ensure perfect compatibility. Dimensions may vary slightly between manufacturing batches.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Quanzhou Jintai Machinery Co., Ltd.,
Location
No.23 Binjiang Avenue,Nan'an City,Fujian Province,China
Contact Person
kelly_wong