ranroswang@hksparkling.com 
+86 138 2341 8469
HIGH-QUALITY 270-6178 GEAR CRANKSHAFT for Caterpillar Engine Equipment 303.5C, 303.5D, 303C CR, 304C CR, 304D CR Excavators
The HIGH-QUALITY 270-6178 GEAR CRANKSHAFT is a premium powertrain core component meticulously engineered for Caterpillar Engine Equipment, specifically tailored to meet the high-torque transmission and precision synchronization demands of 303.5C, 303.5D, 303C CR, 304C CR, and 304D CR Excavators. As the backbone of the engine’s power conversion system, this gear-integrated crankshaft converts the linear motion of pistons into rotational power while leveraging its integrated gear design to drive auxiliary engine components (such as oil pumps and timing systems). It ensures efficient energy transfer, stable engine operation, and synchronized functionality of critical systems even during prolonged heavy-duty construction tasks.
Designed to seamlessly integrate with Caterpillar’s engine architecture, it enhances machinery power output, operational reliability, and overall engine service life.
Key Features
· Custom-engineered for perfect compatibility with Caterpillar 303.5C, 303.5D, 303C CR, 304C CR, 304D CR Excavators
· Integrated gear and crankshaft design for streamlined power transmission and reduced mechanical complexity
· Optimized journal and gear tooth profiles for minimal friction and maximum torque-bearing capacity
· Enhanced fatigue resistance to withstand repeated high-load cycles in harsh operating conditions
· Strict adherence to Caterpillar OEM specifications for seamless integration and consistent powertrain performance
Compatible Models
· Caterpillar Engine Equipment Excavators: 303.5C, 303.5D, 303C CR, 304C CR, 304D CR
Dear Valued Partners,
Thank you for entrusting SPARKLING MACHINERY with your construction equipment component needs—your confidence fuels our dedication to engineering excellence and reliability. Today, we are proud to present the HIGH-QUALITY 270-6178 GEAR CRANKSHAFT, a product crafted with meticulous attention to detail to complement Caterpillar’s renowned excavators.
Whether you’re replacing a worn powertrain component or upgrading to reinforce engine performance and durability, this gear crankshaft is designed to exceed your expectations with its robust functionality, seamless fit, and long-lasting reliability—empowering your machinery to perform at its peak in every work scenario.
The SPARKLING MACHINERY NEW 270-6178 GEAR CRANKSHAFT Photo:
Why Choose the SPARKLING HIGH-QUALITY 270-6178 GEAR CRANKSHAFT?
- Direct-fit compatibility: Precisely manufactured to match the exact dimensions, mounting specifications, gear tooth configurations, and journal tolerances of Caterpillar target excavator models. No modifications, adapters, or reworking are required, enabling hassle-free installation that aligns with original equipment standards.
- Precision control: Advanced CNC machining and strict quality calibration ensure accurate rotational balance, precise gear meshing, and consistent power transmission. This precision minimizes engine vibration, optimizes fuel efficiency, and ensures synchronized operation of auxiliary components—critical for smooth and reliable excavator performance.
- Rigorous quality: Undergoes comprehensive quality testing, including rotational balance verification, torque load-bearing trials, gear tooth accuracy inspections, fatigue resistance cycling, and surface hardness assessments. Every unit meets Caterpillar OEM standards to ensure reliable operation in extreme construction environments—from high-temperature operating conditions to dusty, high-load job sites.
- Professional support: Our team of Caterpillar-specialized technical experts provides end-to-end support—from pre-purchase compatibility consultation to post-installation guidance on crankshaft alignment, gear meshing inspection, and engine maintenance best practices—ensuring a seamless experience for every customer.
- Cost-effective reliability: Offers exceptional durability and performance at a competitive price point. By minimizing downtime caused by powertrain failures, reducing engine wear, and extending overall engine service life, this gear crankshaft maximizes the return on your investment in Caterpillar excavator equipment.
About SPARKLING MACHINERY:
- Founded in 2013, SPARKLING focuses on high-quality excavator parts across hydraulics, undercarriage, engines and electrical systems. We prioritize stability, precision and continuous service, offering worldwide distribution, tailored solutions and strict QC to help customers reduce cost and increase uptime.
Get In Touch:
- Replace your failing ECU confidently. Contact SPARKLING for pricing, lead time, and technical support — restore optimal machine control quickly and reliably.
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📦 Packing
1. Packaging methods: Carton box + Wooden case/Pallet + Anti-rust treatment
2. Export-standard packaging to ensure safety during transportation
3. Custom packaging available upon request
4. Dimensions and weight can be provided for freight calculation
🚚 Shipping
1. Available shipping methods: Sea freight, Air freight, Express delivery (DHL, UPS, FedEx, etc.)
2. LCL (Less than Container Load) and FCL (Full Container Load) options are supported
3. For Russian clients, we can introduce the forwarder agent to you
4. Delivery time: Ships within 1-3 working days after payment (for items in stock)
💳 Payment
1. Accepted methods: T/T, Bank Transfer, PayPal, Alipay, WeChat Pay, Western Union
2. Deposit + balance payment available for large or custom orders
3. Flexible payment options—feel free to contact us for details
📌 Frequently Asked Questions (FAQs)
Q: Which excavator models is this part compatible with?
A: This product is compatible with major brands such as CAT, KOMATSU, HITACHI, and more. Custom specifications are also available.
Q: How can I make sure I’m selecting the correct part?
A: You can send us a photo of the old part, part number, or your excavator model, and we will help you confirm the right match.
Q: Is there a warranty for this product?
A: Yes, we offer a 6-month quality guarantee under normal use.
Get a free quote
We are committed to producing the highest quality products at the most competitive prices. Therefore, we sincerely invite all interested companies to contact us for more information.
Contact us
Email: ranroswang@hksparkling.com
Wechat: +86 136 0901 0879
Skype: foreverlucia1
WhatsApp: +86 136 0901 0879
Address: No. 514-515, Hulin Road, Tianhe District, Guangzhou, China.
Sparkling Machinery Co.,Ltd
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Whatsapp: +8613609010879