High-Quality Undercarriage Track Roller for Caterpillar E303 Excavator
Durable track roller designed for Caterpillar E303 mini excavators, offering smooth track movement, strong load support, and long-lasting performance in tight working conditions.
| Material | 50Mn/40MnB |
|---|---|
| Surface Hardness | HRC53-58,deepth: 8-12mm |
| Colors | Black or yellow or customized |
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Kinton Parts is trusted by professionals worldwide for delivering high-quality parts for excavators, bulldozers, and other construction machinery—with guaranteed performance and durability.
Primary Function of Track Roller for Caterpillar E303 Excavator
The track roller plays a crucial role in supporting the track chain and maintaining proper track tension as the excavator operates. For compact machines like the CAT E303, the roller helps distribute weight evenly, improves ground contact, and reduces vibration. It ensures smooth travel and maneuverability even in tight workspaces or on uneven terrain.
Materials and Heat Treatment of CAT Track Rollers
Our E303 track roller body is forged from high-strength 45# steel, with the surface undergoing precision heat treatment to a hardness range of HRC 52–58. This improves wear resistance, especially in frequent start-stop operations common in mini excavators. The inner bushings use premium alloy steel such as 40Cr or 42CrMo, ensuring long-term durability under rotation and friction.
Production Workflow of Caterpillar E303 Track Rollers
Each roller goes through a standardized process to ensure precision and consistency:
Heat Treatment
Machining Process
CNC turning and milling ensure dimensional accuracy
Assembly
Running Test
Simulated load test to verify functionality
Paint Spraying
Anti-rust coating for surface protection
Packing
| BRAND | MACHINERY MODEL NUMBER | |||||||
|---|---|---|---|---|---|---|---|---|
| CATERPILLAR-CAT | CAT55 | CAT225 | CAT245 | CAT311 | CAT312 | CAT312B | CAT315 | CAT320 |
| CAT320B | CAT320C | CAT320D | CAT320L | CAT322 | CAT324 | CAT325 | CAT325B | |
| CAT325BL | CAT330 | CAT330B | CAT330BL | CAT330C | CAT330D | CAT345 | CAT345B | |
| CAT973 | E55 | E70 | E70B | E120 | E120-1 | E120B | E140 | |
| E200B | E200-5 | E215 | E240 | E300B | E300L | E311 | E312 | |
| E312B | E320 | E320BL | E320C | E320D | E320DL | E320L | E320S | |
| E322B | E322C | E324 | E324D | E324DL | E325 | E325B | E325L | |
| E329DL | E330 | E330B | E330C | E330D | E330DL | E345 | E345B | |
| E450 | CAT301.5 | CAT302.5 | CAT303.5 | CAT305 | CAT307 | CAT308 | CAT313 | |
| CAT316 | CAT318 | CAT320E | CAT320GC | CAT323 | CAT326 | CAT329 | CAT336 | |
| CAT340 | CAT349 | CAT350 | CAT365 | CAT374 | CAT375 | CAT385 | CAT385CL | |
| CAT390 | CAT390D | CAT390DL | CAT390FL | CAT395 | CAT6015 | CAT6015B | CAT6015D | |
| CAT6020 | CAT6020B | CAT6030 | CAT6030B | CAT6030D | CAT6040 | CAT6040B | ||
Looking for a specific make or model not listed here? Reach out and we’ll be happy to assist.
Compatible Models and OEM Reference Numbers
The E303 track roller is suitable for the original undercarriage system of the Caterpillar E303 mini excavator and models with similar dimensions.
OEM Reference Number: 171-7675
Compatible Models:
CAT E303
CAT 303CR
CAT 303.5
CAT 303.5C (Please confirm fit with your specific sub-model and serial number.)
Strict Quality Assurance for CAT E303 Track Roller
To meet the demands of compact construction and landscaping work, we apply comprehensive quality control:
- Dimensional inspection with high-precision gauges
- Surface hardness and depth verification
- Leak testing for internal lubrication systems
- Balanced weight for even track wear
Only certified rollers with consistent performance are packed and shipped.
Application Scenarios for E303 Mini Excavator Track Roller
The Caterpillar E303 track roller is ideal for:
- Urban construction
- Landscaping and utility works
- Foundation trenching
- Small-scale demolition tasks
Its compact size and durability make it perfect for jobs that require high maneuverability and stable undercarriage contact.
Maintenance Tips for Extended Life
- Regularly check for oil leakage and clean debris around the roller
- Inspect for abnormal wear and rotate rollers when needed
- Avoid long-term idle exposure to acid, alkali, or wet soil environments
- Re-lubricate at recommended intervals if applicable
SHIPPING & DELIVERY
At Kinton Parts, we ensure reliable, worldwide shipping of parts for excavators, bulldozers, and a full range of construction machines—safe, fast, and secure.
All products are securely packed using high-quality export cartons, reinforced wooden cases, or industry-standard palletized packaging to ensure maximum protection during transit and smooth handling during unloading.
Standard orders are typically shipped within 3–5 working days, while large or customized orders are usually dispatched within 7–20 days, depending on volume and production requirements.
We offer flexible global shipping options, including:
- International sea freight for cost-effective bulk transport
- Air freight for urgent orders
- Courier delivery (DHL, FedEx, UPS) for small-volume or sample shipments
Our logistics team manages every shipment carefully, providing real-time updates and tracking information until your order arrives safely at your destination.
Need assistance choosing the best shipping method for your location and timeline? Contact our team — we’ll help you plan a smooth delivery experience.
FAQ
Q: What are your main products?
A: We supply a full range of undercarriage and wear parts for excavators, bulldozers, and other heavy equipment. Our product line includes: Track rollers, carrier rollers, front idlers, sprockets, segments, track shoes, track chains, bolt and nuts, pins and bushings, bucket teeth and adaptors, filters, seal kits, swing bearing, and hydraulic cylinder—plus other essential replacement parts.
Q: Which countries do you export to?
A: Kinton Parts exports to over 60 countries worldwide, including:
USA, Canada, UK, Germany, Russia, UAE, Indonesia, Malaysia, Thailand, India, Pakistan, Bangladesh, Sri Lanka, South Africa, Colombia, Peru, and many others.
Q: Can I order a sample?
A: Yes, we accept trial orders. For parts in stock, samples can be shipped quickly. If you have technical drawings or existing samples, we also support customized production and mold development.
Q: How can I track my order after shipping?
A: Once your order is shipped, we will provide you with all necessary tracking information based on the shipping method. For express deliveries, you’ll receive a tracking number to follow the shipment online. For air or sea freight, we’ll send you the relevant documents such as the airway bill (AWB) or bill of lading (B/L), along with the packing list and commercial invoice to help with tracking and customs clearance.
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Trusted by professionals worldwide, Kinton Parts supplies premium-quality components for excavators, bulldozers, and more—with reliable quality you can count on.
