Perkins 403D-11 Crankshaft 115256970 115256830 4343573 for Industrial & Generator Engines

Product Details

Product Overview

This premium replacement crankshaft is specifically engineered for the Perkins 403D-11 diesel engine, a compact and reliable power unit widely used in construction, agriculture, genset, and material handling equipment. The crankshaft serves as the critical rotating component that converts the reciprocating motion of the pistons into rotational torque, directly driving the flywheel and power take-off systems.

Manufactured to OEM specifications, this crankshaft (part numbers 115256970, 115256830, and 4343573) ensures precise journal diameters, proper oil passage alignment, and correct counterweight balance. It is designed for direct bolt-on installation, requiring no modifications to the engine block or bearing saddles. Whether you are rebuilding a 403D-11 engine for a generator set or overhauling a skid steer loader, this component provides the dimensional accuracy and metallurgical integrity required for long service life.

As a high-wear engine component, the crankshaft must withstand extreme torsional loads and cyclic fatigue. This part is manufactured from forged steel with induction-hardened bearing surfaces, providing excellent resistance to wear and fatigue cracking. Each unit undergoes dimensional inspection and hardness testing before shipment to ensure compliance with Perkins engineering standards.

Key Features & Benefits

• OEM-Equivalent Fitment: Direct replacement for Perkins 403D-11 crankshafts, matching original dimensions for main bearing journals, crankpin journals, and thrust bearing surfaces.
• Premium Material Construction: Manufactured from high-strength forged steel with induction-hardened fillets and bearing surfaces for superior fatigue life and wear resistance.
• Precision Balanced: Dynamic balancing ensures smooth engine operation, reducing vibration and extending bearing and seal life in demanding applications.
• Complete Oil Passage Integrity: Properly drilled and deburred oil galleries ensure consistent lubrication to main and connecting rod bearings.
• Rigorous Quality Control: Each crankshaft is inspected for dimensional accuracy, surface finish, hardness, and magnetic particle testing to detect surface defects.
• Versatile Application: Suitable for Perkins 403D-11 engines used in generators, pumps, compressors, agricultural tractors, and compact construction equipment.
• Competitive Value: Offers OEM-level quality at a fraction of dealership pricing, ideal for fleet maintenance and engine rebuilders.

Technical Specifications

OEM Cross-Reference

This crankshaft is a direct replacement for the following original equipment manufacturer (OEM) part numbers. Cross-reference your existing part number to confirm compatibility:

• Perkins OEM: 115256970, 115256830, 4343573
• Alternative Number: 4343573 (Cat/Perkins cross-reference)

Note: Always verify the crankshaft part number stamped on your existing component or refer to your engine’s parts manual before ordering. This part is for the 403D-11 engine only; it is not compatible with the 403D-15 or 404D-22 models.

Compatibility

This crankshaft is commonly used for the following engine and equipment applications:

• Engine: Perkins 403D-11 (4-cylinder, 1.1L displacement, naturally aspirated diesel)
• Typical Applications: Construction (mini excavators, compact loaders), Agriculture (small tractors, sprayers), Genset (standby and prime power generators), Marine (auxiliary engines), Material Handling (forklifts, telehandlers), Industrial (pumps, compressors)

Important: This is a component part. Professional installation by a qualified diesel technician is recommended. Improper installation can cause engine damage.

Global Supply & Distribution

We maintain robust inventory levels to support international B2B buyers, including engine rebuilders, equipment dealers, and fleet maintenance operations. Our global supply chain ensures reliable delivery to major markets worldwide:

• North America: Fast shipping to Los Angeles, Houston, Chicago, Toronto, and Vancouver ports with customs-cleared documentation.
• Europe: Regular shipments to Rotterdam, Hamburg, Antwerp, and Felixstowe for distribution across the EU and UK.
• Asia-Pacific: Direct delivery to Singapore, Shanghai, Tokyo, Sydney, and Dubai for regional distribution hubs.
• Middle East & Africa: Service to Jebel Ali (Dubai), Jeddah, Durban, and Lagos with competitive freight rates.
• Latin America: Shipments to Panama, Santos, Buenos Aires, and Callao for South American markets.

We offer flexible shipping options including air freight (3-7 days), sea freight (20-35 days), and express courier (5-10 days). All exports comply with international trade regulations, with full commercial invoices and certificates of origin provided.

Quality Assurance

Every crankshaft in our inventory undergoes strict quality control procedures to ensure reliability and longevity:

• Manufacturing Standards: Produced in ISO 9001-certified facilities with precision CNC machining centers.
• Material Certification: Heat treatment and material composition verified against OEM specifications.
• Dimensional Inspection: 100% inspection of main journal O.D., crankpin O.D., width, and concentricity using calibrated micrometers and CMM equipment.
• Non-Destructive Testing: Magnetic particle inspection (MPI) performed on all units to detect surface cracks or inclusions.
• Hardness Testing: Rockwell hardness verified on bearing surfaces and fillet radii to ensure proper induction hardening depth.
• Warranty Coverage: 6-month warranty against manufacturing defects in materials and workmanship. After-warranty online technical support available.
• Video Inspection: Outgoing video inspection available upon request for order confirmation.

FAQ

Q1: How do I confirm this crankshaft fits my Perkins 403D-11 engine?
A: First, locate the engine serial number plate on your 403D-11 engine (typically on the valve cover or side of the block). Verify the engine model is exactly “403D-11” (not 403D-15 or 404D series). Then, cross-reference your existing crankshaft part number – it should match one of these: 115256970, 115256830, or 4343573. If you have a different number, contact us with your engine serial number and current part number for verification.

Q2: Can I install this crankshaft without removing the engine from the equipment?
A: In most applications (generators, pumps, compact loaders), the engine must be removed from the chassis to access the crankshaft. The 403D-11 crankshaft replacement requires removing the oil pan, main bearing caps, connecting rods, and front timing cover. We recommend performing this replacement during a complete engine overhaul, as the cylinder head, pistons, and bearings should also be inspected and replaced if worn. Professional installation by a Perkins-certified technician is strongly advised.

Q3: What other components should I replace when installing a new crankshaft?
A: During a crankshaft replacement, we strongly recommend replacing the following components to ensure reliable service: main bearings (upper and lower shells), connecting rod bearings, thrust washers, front and rear main seals, and oil pan gasket. Additionally, inspect the oil pump for wear and replace if necessary. Using new, properly torqued fasteners (main bearing cap bolts and connecting rod bolts) is critical – never reuse old bolts. Always follow the Perkins service manual for torque specifications and tightening sequences.