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D3958414 XCMG GR2605 motor grader o-ring
Part Number: D3958414 (shortened to 3958414)
Type: O-Ring (Static Seal)
Material: Fluororubber (FKM, 75 durometer), oil-resistant, high-temperature resistant, and compression set resistant
Key Dimensions: Inner Diameter (ID) approx. 20.3mm (0.799in), Cross-Section (CS) approx. 2.62mm (0.103in)
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Product Details:
D3958414 XCMG GR2605 motor grader o-ring
Technical Parameters
Part Number: D3958414 (shortened to 3958414)
Type: O-Ring (Static Seal)
Material: Fluororubber (FKM, 75 durometer), oil-resistant, high-temperature resistant, and compression set resistant
Key Dimensions: Inner Diameter (ID) approx. 20.3mm (0.799in), Cross-Section (CS) approx. 2.62mm (0.103in)
Cross Reference: 4898439 (interchangeable)
Weight: Approx. 0.01kg/piece (actual product)
Operating Media: Engine oil, diesel, coolant, hydraulic fluid
Operating Temperature: -40°F to +302°F (-40°C to +150°C)
Standard: Cummins OEM Assembly Specification
Application
Applicable Engines: Cummins ISB3.9/5.9/6.7, ISD4.5/6.7, QSB3.9/4.5/5.9/6.7, ISF2.8/3.8 series electronic diesel engines
Equipment:
- Commercial Vehicles: Dongfeng Tianlong, Tianjin, Foton Auman, JAC heavy/light trucks
- Construction Machinery: Komatsu, Sany, XCMG excavators, loaders, rollers
- Industrial: Cummins generator sets, forklifts, air compressors
- Marine: Small marine diesel engines
Typical Locations: Static sealing joints such as engine block to gear housing, oil pump mounting face, fuel system connections, and cooling system line interfaces
Common Faults & Troubleshooting
Seal Failure & Leakage
Symptoms: Oil/coolant leakage at corresponding joints, dropping fluid levels, surface stains around connections
Solution: Replace with genuine D3958414 O-ring; clean groove and contact surfaces; inspect groove dimensions (repair if out of tolerance); avoid twisting and overstretching during installation; lightly apply lubricant for easier fitting
Compression Set
Symptoms: Loss of elasticity, increased joint clearance, recurrent leakage
Solution: Replace with genuine FKM D3958414 O-ring; diagnose abnormal system pressure and temperature; optimize cooling and line layout
Installation Damage
Symptoms: Cuts/cracks on O-ring surface, short-term leakage
Solution: Replace damaged O-ring; use specialized installation tools; clean assembly environment and component surfaces
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