C3964337 XCMG GR2605 motor grader quick-change connector

Technical Parameters

• Part No.：C3964337 (3964337)
• Brand：Cummins (DCEC) Genuine
• Type：Straight push-in fuel connector
• Fit Tube：ID 10mm nylon / OD 14.6mm high-pressure fuel line
• Port Size：15.82mm (15/16″) standard push-in
• Seal：FKM O-ring (fuel resistant)
• Locking：4 stainless steel balls + spring
• Pressure：0–1.6 MPa
• Temp Range：-40℃ to +125℃
• Material：Brass, nickel-plated
• Length：42mm
• Weight：Approx. 0.03kg
• Cross Reference：C3287433, C3964338, C4934305

Application

Fit Engines

• Cummins ISDe 4.5L/6.7L (Euro IV/V)
• Cummins ISBe 5.9L, QSB6.7L
• Cummins 6BT5.9, 6CT8.3 Common Rail

Fit Equipment

• Construction：XCMG LW500 loader, XE215 excavator, SANY/LiuGong machinery
• Trucks：Dongfeng Tianlong/KR, Foton Auman/Aumark

Mounting Locations

• Fuel filter → High-pressure pump inlet
• Common rail → Return line
• Water separator → Fuel tank outlet
• Frequent maintenance fuel line connections

Common Faults & Troubleshooting

1. Fuel Leakage

• Cause：Worn O-ring, damaged balls, improper insertion
• Fix：Replace C3964337 + new O-ring; ensure full insertion (click)
• Action：Install genuine connector; clean ports

2. Loose/Disconnected Hose

• Cause：Worn balls, weak spring, incorrect tube size
• Fix：Replace C3964337; use OD 14.6mm nylon tube
• Action：Verify hose dimensions; cut square ends

3. Restricted Fuel Flow

• Cause：Internal clogging, stuck valve, misaligned seal
• Fix：Replace C3964337; clean lines; replace fuel filter
• Action：Inspect for debris; use clean diesel

4. Corrosion/Jamming

• Cause：Poor plating, moisture, long-term disuse
• Fix：Use genuine C3964337 nickel-plated brass
• Action：Lubricate with silicone grease; periodic maintenance