3902343 XCMG GR2605 motor grader dowel ring

Technical Parameters

• Part Number: C3902343 (3902343)
• Brand: DCEC Cummins
• Type: Cylindrical Dowel Ring / Bushing
• Material: 45# Carbon Steel
• Treatment: Induction Hardened, Black Oxide
• Hardness: HRC 55-60
• Dimensions: OD φ16mm, ID φ12mm, Height 10mm
• Precision: Coaxiality ≤0.02mm, Cylindricity ≤0.01mm
• Fit Engines: Cummins 4BT3.9, 6BT5.9, ISDE, QSB6.7
• Qty: 2–4 per engine
• Cross Reference: 3900068, 3918673 (interchangeable)

Application Scenarios

• Block & Head: Main oil gallery, combustion chamber alignment
• Gear Housing & Block: Rear gear train positioning
• Oil Cooler & Block: Cooler housing sealing
• Flywheel Housing & Block: Rear end alignment
• Machinery: Loaders, excavators, bulldozers (6BT/ISDE/QSB)
• Vehicles: Dongfeng Kinland, Tianjin, 153 (4BT/6BT)
• Functions: Precise location, shear resistance, clearance control

Common Faults & Troubleshooting

1. Wear & Deformation

• Cause: Vibration, impact, fatigue, heat expansion
• Symptom: Shifting, leaks, noise, increased clearance
• Fix: Inspect wear; replace C3902343; clean bores

2. Breakage & Fracture

• Cause: Excessive interference, impact, resonance
• Symptom: Misalignment, leaks, vibration
• Fix: Install OEM C3902343; repair bores; control fit

3. Corrosion & Seizure

• Cause: Coolant contamination, moisture, poor material
• Symptom: Stuck, rust, poor fit
• Fix: Clean bores; replace C3902343; apply anti-seize