QST30-G5 STD Main Bearing & Connecting Rod Bearing Set for Cummins Engine Parts

Product Details

Product Overview

This premium bearing set includes both STD (Standard Size) Main Bearings and Connecting Rod Bearings, specifically designed for the Cummins QST30-G5 diesel engine. As a critical component for engine rebuilds and overhauls, this set ensures precise fitment and reliable performance in demanding applications such as excavators, trucks, forklifts, bulldozers, buses, and loaders.

Manufactured to OEM specifications, these bearings provide the exact clearance and load-bearing capacity required for the QST30-G5 engine platform. The set is engineered for both original equipment replacement and aftermarket service, offering a cost-effective solution without compromising on quality or durability.

Please verify your engine model and bearing size requirements before purchase. This standard size (STD) set is intended for engines with original factory specifications that have not been previously oversized or undersized.

Key Features & Benefits

• Precision Engineering: Manufactured to exact OEM specifications for the Cummins QST30-G5 engine, ensuring proper oil clearance and load distribution.
• Complete Set: Includes both main bearings and connecting rod bearings in one convenient package, simplifying inventory management and procurement.
• STD Size Assurance: Standard size bearings for engines with original factory dimensions, eliminating guesswork during engine rebuilds.
• Durable Construction: High-quality bearing material designed to withstand the extreme pressures and temperatures of heavy-duty diesel operation.
• Cost-Effective Solution: Competitive pricing for B2B buyers, offering significant savings compared to OEM alternatives while maintaining performance standards.
• Wide Application Compatibility: Suitable for various heavy equipment including excavators, trucks, forklifts, bulldozers, buses, and loaders powered by QST30-G5 engines.
• Global Logistics Support: Fast shipping to major industrial centers worldwide with comprehensive export documentation.

Technical Specifications

OEM Cross-Reference

This bearing set is designed as a direct replacement for Cummins QST30-G5 engine applications. While specific OEM part numbers may vary by engine configuration and manufacturer, this set corresponds to the standard factory specifications for the following:

• Cummins QST30-G5 Main Bearing Set (STD)
• Cummins QST30-G5 Connecting Rod Bearing Set (STD)
• Compatible with OEM bearing specifications for QST30-G5 engine platform

Note: For exact OEM cross-reference, please consult your engine service manual or contact our technical support team with your engine serial number.

Compatibility

This bearing set is commonly used for the following applications equipped with the Cummins QST30-G5 diesel engine:

• Excavators: Heavy construction and mining equipment
• Trucks: Heavy-duty commercial vehicles and haulage trucks
• Forklifts: Large capacity material handling equipment
• Bulldozers: Earthmoving and construction machinery
• Buses: Commercial passenger transport vehicles
• Loaders: Wheel loaders and track loaders
• Other Industrial Equipment: Generators, pumps, and stationary power units

Important: Always verify your engine model (QST30-G5) and bearing size (STD) before purchasing. This product is specifically designed for the QST30-G5 engine platform and may not be compatible with other engine variants.

Global Supply & Distribution

We serve a worldwide network of B2B clients including engine rebuilders, equipment dealers, fleet operators, and industrial parts distributors. Our strategic location in Guangdong and Guizhou, China enables efficient logistics to major global markets.

• North America: Fast delivery to ports in Los Angeles, Houston, New York, Vancouver, and Toronto
• Europe: Reliable shipping to Rotterdam, Hamburg, Antwerp, and major inland industrial centers
• Asia-Pacific: Direct distribution to Singapore, Tokyo, Sydney, Dubai, and other key markets
• Middle East & Africa: Regular shipments to Jebel Ali, Dammam, Lagos, and Johannesburg
• South America: Service to Santos, Buenos Aires, and Valparaíso

We provide comprehensive export documentation including commercial invoices, packing lists, certificates of origin, and customs clearance support for smooth international transactions.

Quality Assurance

Every bearing set undergoes rigorous quality control procedures to ensure reliability and performance:

• Material Verification: Raw materials are tested to meet industrial standards for bearing applications
• Dimensional Inspection: Precision measurement of all bearing surfaces to OEM specifications
• Video Outgoing Inspection: Visual documentation of final product quality before shipment
• Machinery Test Report: Performance verification under simulated operating conditions
• 6-Month Warranty: Coverage against manufacturing defects for peace of mind

Our manufacturing processes comply with international quality standards for diesel engine components, ensuring consistent product quality across all production batches.

FAQ

Q1: How do I confirm these STD bearings are correct for my QST30-G5 engine?
A: Verify your engine model number is exactly QST30-G5. STD (Standard Size) bearings are for engines with original factory specifications that have not been previously rebored or had crankshaft grinding. Check your engine service manual for bearing clearance specifications. If your engine has been previously overhauled with oversized bearings, STD size will not be suitable.

Q2: What is the recommended installation procedure for these bearings?
A: Installation should be performed by a qualified diesel engine technician. Key steps include: thoroughly clean the bearing surfaces and oil passages, apply clean engine oil to bearing surfaces before installation, use a torque wrench to tighten main bearing and connecting rod bolts to manufacturer specifications (typically in stages), and verify oil clearance using plastigage. Always refer to the Cummins QST30-G5 service manual for exact torque values and procedures.

Q3: How should I store these bearings before installation?
A: Store bearings in a clean, dry environment at room temperature (15-25°C / 59-77°F). Keep them in their original packaging to protect against dust, moisture, and contamination. Avoid exposure to extreme temperatures, direct sunlight, or corrosive chemicals. Do not remove protective coatings until immediately before installation. Proper storage ensures the anti-corrosion protection remains effective for up to 12 months from the date of manufacture.