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C3938655 XCMG GR2605 motor grader cover gasket
Part Number: C3938655 (shortened to 3938655)
Type: Accessory Drive Cover Gasket / Vacuum Pump Mounting Gasket
Material: Non-asbestos Metal-rubber Composite (oil-resistant, high-temperature resistant, anti-aging)
Structure: Irregular quadrilateral/diamond shape with 2 bolt holes, central sealing area
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Product Details:
C3938655 XCMG GR2605 motor grader cover gasket
Technical Parameters
Part Number: C3938655 (shortened to 3938655)
Type: Accessory Drive Cover Gasket / Vacuum Pump Mounting Gasket
Material: Non-asbestos Metal-rubber Composite (oil-resistant, high-temperature resistant, anti-aging)
Structure: Irregular quadrilateral/diamond shape with 2 bolt holes, central sealing area
Dimensions: Approx. 116mm × 84mm × 1.2mm (standard thickness)
Cross Reference: 3929751, 3008400, 3931608 (interchangeable)
Operating Media: Engine oil, diesel fuel
Operating Temperature: -30℃ to +180℃
Standard: Cummins OEM Assembly Specification
Application
Applicable Engines: Cummins 4BT3.9, 6BT5.9, 6CT8.3, ISB5.9, QSB5.9, QSM11 series diesel engines.
Equipment:
- Commercial Vehicles: Dongfeng Tianlong, Tianjin, 153, Dodge Ram (1989-2002) 5.9L diesel
- Construction Machinery: Komatsu, Sany, XCMG, Hyundai excavators/loaders/rollers
- Industrial: Cummins generator sets, forklifts, air compressors
- Marine: Small marine diesel engines
Mounting Location
- Engine Gear Housing Side (accessory drive cover/vacuum pump mounting face)
- Matching seal for C4942479 Cover (same position assembly)
- Seal for vacuum pump, power steering pump, air compressor to gear housing interface
Common Faults & Troubleshooting
Oil Leakage (Most Common)
- Causes: Gasket aging/hardening, compression set, installation damage, loose bolts
- Symptoms: Oil seepage around cover, dirt buildup, abnormal oil level drop, gear housing side leakage
- Solution: Replace with genuine C3938655 gasket; thoroughly clean mating surfaces (no oil/burrs); torque bolts to 18-22N·m crosswise evenly, avoid over-tightening single point
Gasket Breakage/Tearing
- Causes: Rough installation, tool scratches, uneven mating surface, long-term vibration tearing
- Symptoms: Gasket fracture, gaps, seal failure, rapid leakage
- Solution: Replace with new gasket; check mounting surface flatness (repair impact damage); align carefully during installation, avoid stretching/twisting
Recurrent Seal Failure
- Causes: Inferior non-genuine gasket, poor oil resistance, installation debris, uneven bolt torque
- Symptoms: Short-term re-leakage after replacement, oil seepage at gasket edges
- Solution: Use genuine C3938655 gasket; strictly clean assembly surfaces; fasten step-by-step per standard torque; never reuse old gaskets
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1. C4942479 Cover plate
2. C3900637 Hexagonal flange bolts
3. C3938655 Accessory drive cover plate sealing gasket
*For other spare parts procurement needs, please contact us!
