Cummins connecting rod 6204-31-3111 4993823 B3.3 QSB3.3 Komatsu 4D95 S4D95 6D95 engine China supplier

Cummins connecting rod 6204-31-3111 4993823 B3.3 QSB3.3 Komatsu 4D95 S4D95 6D95 engine China supplier

Product Item：001

Part Number 6204-31-3111

Machine Model 6D95

Condition: Aftermarket New

Type: Connect Rod

Description

Cummins connecting rod 6204-31-3111 4993823 B3.3 QSB3.3 Komatsu 4D95 S4D95 6D95 engine China supplier

Cummins/Komatsu Connecting Rod Assemblies (Part #6204-31-3111 / 4993823) for B3.3, QSB3.3, 4D95, S4D95 & 6D95 Engines – China Supplier Direct

◆ Product Overview
High-quality connecting rod assemblies, cross-referenced to OEM part numbers 6204-31-3111 (Komatsu) and 4993823 (Cummins), engineered for Cummins B3.3/QSB3.3 industrial engines and compatible with Komatsu 4D95, S4D95, and 6D95 engine series. These precision components are supplied as new OEM-equivalent parts, ensuring reliable performance across multiple engine platforms in construction and industrial equipment.

◆ Supplier Profile
✓ Type: China Specialist in Cross-Platform Engine Components
✓ Focus: Cummins B3.3 & Komatsu D95 Series Engine Parts Interchange
✓ Services: Genuine-Quality Parts Supply, Cross-Reference Verification, Technical Support
✓ Market: Global Engine Rebuilders, Equipment Fleets, Parts Distributors
✓ Certification: ISO 9001:2015, IATF 16949 Quality Systems

◆ Part Specifications & Cross-Compatibility
✓ OEM Part Numbers:

Komatsu: 6204-31-3111 / 6204313111
Cummins: 4993823
✓ Part Name: Complete Connecting Rod Assembly
✓ Primary Engine Applications:
Cummins: B3.3, QSB3.3 Series Industrial & Construction Engines
Komatsu: 4D95, S4D95, 6D95 Engine Series
✓ Machine Compatibility:
Equipment powered by Cummins B3.3/QSB3.3 engines
Komatsu PC60, PC78, PC100, PC130 series excavators
Various compact construction equipment and industrial machinery
✓ Condition: 100% New, OEM-Quality Manufacturing

◆ Product Features & Engineering Specifications
✓ Material: High-strength forged steel with precision alloy composition
✓ Manufacturing Process:

Precision die forging for optimal grain structure
CNC machining to exact dimensional specifications
Computer-controlled heat treatment for strength and durability
Precision grinding of critical bearing surfaces
✓ Design Features:
Optimized I-beam design for strength-to-weight ratio
Precision oil passage and spray hole configurations
Weight-matched sets for engine balance requirements
✓ Complete Assembly Includes:
Connecting rod body (forged and machined)
Matched connecting rod cap
High-tensile strength rod bolts and nuts
Precision bearing shells (upper and lower)

◆ Manufacturing Quality Standards
✓ Material Certification: Documented material traceability with chemical analysis
✓ Dimensional Accuracy: CNC machining within ±0.005mm tolerance on critical dimensions
✓ Heat Treatment: Controlled quenching and tempering to achieve specified hardness
✓ Surface Integrity: Precision grinding and polishing of bearing surfaces
✓ Weight Matching: Individual rods weight-classified for proper engine balance
✓ Final Inspection: 100% dimensional, surface, and weight verification

◆ Technical Specifications
✓ Length (Center-to-Center): Precisely manufactured to original engine design specifications
✓ Big End Bore: Exact diameter for proper bearing clearance and crush fit
✓ Small End Bore: Correct size for piston pin fit (press or clearance as specified)
✓ Weight Class: Marked and verified for proper piston/rod assembly matching
✓ Bolt Specifications: High-grade metric bolts with defined torque/yield characteristics
✓ Bearing Surfaces: Precision ground for optimal oil film retention and load distribution

◆ Installation Requirements & Guidelines
✓ Professional Installation Required: Critical component demanding skilled technician installation
✓ Essential Tools:

Precision torque wrench (calibrated)
Micrometers and dial bore gauges
Plastigage or equivalent clearance measurement tools
Proper cleaning solvents and assembly lubricants
✓ Installation Procedure:

Complete cleaning of all components
Verification of bearing clearances using approved methods
Proper lubrication of all bearing surfaces
Adherence to exact torque specifications and sequences
Verification of piston alignment and protrusion
✓ Critical Best Practices:

Replace connecting rods in complete sets
Never reuse old rod bolts – always use new bolts
Verify crankshaft journal condition before installation
Follow manufacturer-specific service manual procedures

◆ Quality Assurance Process
✓ Dimensional Verification: All critical dimensions checked against master specifications
✓ Material Testing: Chemical composition and mechanical property validation
✓ Surface Inspection: Microscopic examination of bearing surfaces for defects
✓ Weight Classification: Precise weight matching to ensure engine balance
✓ Documentation: Material certificates, inspection reports, and compliance documentation available

◆ Supply & Logistics Information
✓ Inventory Status: Regularly stocked for immediate shipment
✓ Order Options: Available as individual rods or complete engine sets
✓ Packaging: Industrial-grade protective packaging with anti-corrosion treatment
✓ Shipping Methods:

Express courier (DHL/FedEx/UPS) for urgent requirements
Sea freight for bulk/container orders
✓ Lead Times:
Standard orders: 7-14 business days
Custom/bulk orders: 20-35 business days
✓ Minimum Order: Single parts available – no minimum quantity restrictions

◆ Application Scenarios
✓ Engine Overhaul Projects: Essential component during complete engine rebuilds
✓ Preventive Maintenance: Scheduled replacement during major service intervals
✓ Failure Repair: Replacement of damaged, worn, or fatigued connecting rods
✓ Fleet Maintenance Programs: Bulk supply for equipment maintenance operations
✓ Performance Restoration: Critical for restoring proper engine compression and efficiency

◆ Customer Support Services
✓ Technical Documentation: Detailed engineering drawings and specifications
✓ Cross-Reference Verification: Assistance confirming compatibility for specific applications
✓ Installation Guidance: Basic procedures and critical torque specifications
✓ Quality Certification: Material and compliance certificates provided upon request
✓ Volume Order Support: Custom pricing and logistics arrangements for bulk requirements

◆ Important Usage & Safety Notes
✓ Critical Safety Component: Connecting rods are safety-critical parts – thorough inspection required before installation
✓ Proper Storage: Maintain in original packaging in clean, dry, temperature-controlled environment
✓ Pre-Installation Verification: Check all dimensions, clearances, and fits before assembly
✓ Torque Procedure Compliance: Use calibrated equipment and follow exact torque specifications
✓ Bearing Clearance Verification: Always verify with proper measurement tools before final assembly