Product Details
Blogs List
How to Find the Best Allison Transmission ...
2025-11-05 Comments Off on How to Find the Best Allison Transmission Spare Parts Supplier in China?Need More Information?
We’re happy to help you find the best option for your application.
C3867646 XCMG GR2605 motor grader o-ring
Part Number: C3867646 (3867646)
Type: O‑Ring Seal / Circular Cross‑Section Seal Ring
Material: Fluorine Rubber (FKM) / Nitrile Rubber (NBR)
Inner Diameter: Approx. 75.9mm (2.989″)
Share:
Product Details:
C3867646 XCMG GR2605 motor grader o-ring
Technical Parameters
Part Number: C3867646 (3867646)
Type: O‑Ring Seal / Circular Cross‑Section Seal Ring
Material: Fluorine Rubber (FKM) / Nitrile Rubber (NBR)
Inner Diameter: Approx. 75.9mm (2.989″)
Cross‑Section Diameter: Approx. 1.78mm (0.070″)
Operating Temperature: -40℃ to +200℃ (FKM)
Operating Pressure: 0–40MPa
Applicable Media: Engine Oil, Diesel Fuel, Coolant, Compressed Air
Cross Reference: 6V3865, AS568A-041
Standard: Cummins Original Standard, AS568A
Application
Applicable Engines: Cummins M11, ISM11, QSM11, L10, K19, K38, N14, NT855 series diesel engines
Equipment:
- Heavy Commercial Vehicles: Dongfeng Tianlong, FAW J6, Shacman Delong, Foton Auman
- Construction Machinery: Komatsu, Caterpillar, Sany, XCMG excavators, loaders, bulldozers
- Generator Sets: 150–500kW Cummins diesel generator sets
- Industrial Equipment: Marine main engines, air compressors, water pumps, oilfield machinery
Installation Locations:
- Cylinder Head/Block: Water jacket holes, oil gallery holes, tappet bore seals
- Fuel System: High‑pressure fuel pump, injectors, fuel line connections
- Lubrication System: Oil cooler, oil filter housing, oil line fittings
- Cooling System: Thermostat housing, water pump connections, coolant lines
- Other Areas: Turbocharger center housing, air compressors, crankcase vents
Common Faults & Troubleshooting
1. Aging Hardening/Cracking
- Causes: Long‑term high temperature, fluid corrosion, ozone aging, material degradation
- Symptoms: Seal failure, oil/coolant seepage, pressure drop, unstable performance
- Solution: Replace with genuine C3867646 O‑ring; clean groove, check operating temperature
2. Permanent Compression Set/Loss of Elasticity
- Causes: Long‑term compression, overheating, material fatigue, over‑tight installation
- Symptoms: Poor sealing contact, persistent leakage, loss of compression rebound
- Solution: Install new seal; maintain proper compression (15%–30%)
3. Damage/Cutting/Breakage
- Causes: Installation scratches, groove burrs, fluid shock, foreign object extrusion
- Symptoms: Sudden leakage, heavy fluid seepage, rapid pressure drop
- Solution: Replace seal; smooth groove, remove burrs, proper assembly
4. Swelling/Softening/Dissolution
- Causes: Incompatible media, low‑quality oil, chemical corrosion
- Symptoms: Volume expansion, soft texture, extrusion from groove, seal failure
- Solution: Use FKM C3867646; use approved lubricants and fluids
Get a personalized quote now
1. C3867646 O-ring seal
2. C4933777 Inlet transition pipe
3. C5266140 V-clamp
*For other spare parts procurement needs, please contact us!
