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21486081 Volvo Rear Crankshaft Oil Seal D6/D7 Excavator

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  2. 21486081 Volvo Rear Crankshaft Oil Seal D6/D7 Excavator
21486081 Volvo Rear Crankshaft Oil Seal D6/D7 Excavator

Stop destructive crankcase oil leaks and protect your main hydraulic pump drive with our Premium Heavy-Duty Crankshaft Rear Oil Seal 21486081 (20412568). Molded from advanced high-temperature Viton elastomer with a built-in hydrodynamic pumping lip and dust shield for VOLVO EC210D, EC290B, and EC300E excavators, it ensures a leak-free seal. Factory-direct B2B wholesale pricing with fast air express international shipping. Contact our sales engineering support team today with your engine model for bulk tiered quotes!

VOLVO 21486081 Rear Crankshaft Oil Seal Specification

Genuine VOLVO Rear Crankshaft Oil Seal 21486081

Product Overview: The Genuine VOLVO Rear Crankshaft Oil Seal (P/N: 21486081 / VOE21486081 / 20412568) is a precision radial lip seal engineered for 4-cylinder and 6-cylinder inline diesel engines. Mounted on the flywheel side of the crankshaft rear end, it locks lubricant inside the crankcase while isolating external dust and clutch debris to maintain stable oil pressure.

1. Core Technical Advantages

  • Premium FKM Viton Material: Excellent heat and oil corrosion resistance; prevents aging and cracking under continuous high-load operations.

  • Hydrodynamic Pumping Lip: Spiral groove design actively pumps escaping oil back into the crankcase during rotation.

  • Dual Dust Protection: Features an outer wiper lip to stop sand and environmental dust from damaging the main sealing edge.

  • Constant Tension Spring: Stainless steel garter spring delivers uniform holding force against shaft deflection and engine vibration.

2. Technical Specifications Matrix

Engineering ParameterTechnical Data & Specification Details
Genuine OEM Part Numbers21486081 / VOE21486081 / 20412568
Product ClassificationRear Flywheel Side Crankshaft Radial Lip Oil Seal
Applicable MediaMineral & synthetic engine oil, combustion blow-by gas
Sealing MaterialHigh-temperature resistant FKM Viton elastomer
Tension ComponentAnti-corrosion stainless steel garter spring
Outer ShellThick carbon steel reinforced rigid housing

3. Master Application Fleet Guide

This rear seal is engineered for a wide range of VOLVO infrastructure and mining machinery:

  • Medium/Heavy Excavators: EC200D, EC200E, EC210D, EC210E, EC220D, EC240B, EC240B Prime

  • Large Quarry Excavators: EC250D, EC250E, EC290B, EC290B Prime, EC300D, EC300E, EC350D

  • Wheeled Excavators: EW140B

4. Common Failure Symptoms

  • Oil Dripping from Flywheel Housing: Continuous leaks due to a hardened or cracked sealing lip.

  • Elevated Oil Consumption: Rapid oil loss triggering low oil pressure warnings under heavy loads.

  • Contaminated Starter & Coupling: Splashed engine oil staining the starter motor and drive coupling, risking electrical failure.

Standard Overhaul & Installation Guidelines:
Disassemble the hydraulic pump and flywheel assembly. Remove the old seal using a dedicated tool without scratching the crankshaft surface. Clean the mounting bore thoroughly. If the shaft shows groove wear, install a repair sleeve. Fit the new seal dry as per factory requirements, using a dedicated installation tool to press the seal into place vertically and evenly.

5. B2B Procurement Strategy

Replacing a rear main seal requires separating the engine and transmission/pump tower, making it a high-labor operation. Using low-quality seals causes costly repeat labor and downtime. Stocking original 21486081 seals ensures long-term reliability. We recommend bundling this seal with cylinder head and oil pan gaskets for comprehensive overhaul packages.

6. Global Brand Cross-Reference Matrix

Brand DesignationCross-Reference Part Information
VOLVO Original Part No.21486081 / VOE21486081
Interchangeable Part No.20412568 / VOE20412568
SupplierXuzhou Sinoswift Import & Export Co., Ltd.
Contact+86 13701956981 / [email protected]

Note: All machine models are for compatibility reference only.

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