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C3918685 XCMG GR2605 motor grader intake transition pipe
Part Number: C3918685 (3918685)
Type: Air Transfer Pipe / Turbo Inlet Pipe / Turbo Elbow
Material: Cast Aluminum Alloy (ADC12/AlSi9Cu3)
Design: 90° Elbow, V-band Clamp End + Socket/Flange End, 1× Sensor Port (M12×1.5)
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Product Details:
C3918685 XCMG GR2605 motor grader intake transition pipe
C3918685 (3918685) is a genuine Cummins turbocharger air transfer pipe, a high-pressure airflow transition component for engine intake systems. Precision-cast from high-strength aluminum alloy, it features a 90° elbow design with a V-band clamp quick-connect end and a flange/socket end, plus a sensor port for boost pressure/temperature monitoring. Offers high temperature resistance, pressure resistance, vibration durability, smooth airflow, and reliable sealing, ensuring efficient, leak-free charge air delivery between turbocharger, intercooler, and intake manifold.
Technical Parameters
Part Number: C3918685 (3918685)
Type: Air Transfer Pipe / Turbo Inlet Pipe / Turbo Elbow
Material: Cast Aluminum Alloy (ADC12/AlSi9Cu3)
Design: 90° Elbow, V-band Clamp End + Socket/Flange End, 1× Sensor Port (M12×1.5)
Fit Diameter: V-band Φ83mm (matches C3415547 clamp), Socket Φ76~80mm
Operating Temperature: -40℃ to +180℃
Operating Pressure: ≤0.6MPa (6bar)
Finish: Anodized / Powder Coated (Corrosion Protection)
Cross Reference: 4935790, 3918686, 3923060
Standard: Cummins Original, ISO 9001, TS16949
Application
Applicable Engines: Cummins 6BT5.9, 6BTA5.9, 4BT3.9, QSB5.9, ISBe, ISDe, 6CT8.3 series; fits HX35, HX35W, HY35, HX40 turbochargers (180~210HP engines).
Equipment:
- Heavy Commercial Vehicles: Dongfeng Tianlong, Tianjin, Dalishen, Foton Aumark
- Construction Machinery: Komatsu, Hitachi, Kobelco Excavators; LiuGong, Lonking Loaders; Rollers, Compressors
- Generator Sets: 100~160kW Cummins Diesel Generators
- Industrial Equipment: Marine Engines, Oilfield Machinery, Air Compressor Stations
Installation Locations:
- Turbo Compressor Outlet → Intercooler Inlet Transition Connection
- Intercooler Outlet → Engine Intake Manifold Front Pipe
- Boost Pressure (MAP) / Intake Air Temperature Sensor Mounting
- EGR Mixing Chamber, Throttle Body Upstream Air Passage
Common Faults & Troubleshooting
1. Crack & Leak / Boost Loss
- Causes: Thermal fatigue, vibration resonance, thermal shock, installation stress, material defects
- Symptoms: Low boost, power loss, poor acceleration, high fuel consumption, hissing noise
- Solution: Replace with C3918685 pipe; inspect C3415547 clamp, clean sealing surfaces, align properly
2. Sensor Port Damage / Stripped Threads
- Causes: Excessive torque, loose sensor, impact, corrosion
- Symptoms: Sensor error, fault codes (P0236/P0237/P0106), rough idle, torque derate
- Solution: Install new C3918685 pipe; replace sensor, torque to 18~22N·m
3. Carbon Buildup / Flow Restriction
- Causes: Oil blow-by, exhaust backflow, dirty air filter, dust ingestion
- Symptoms: High intake restriction, slow response, power loss, black smoke, heavy soot
- Solution: Replace C3918685 pipe; clean turbo, replace air filter, check CCV system
4. Interface Wear / Poor Sealing
- Causes: Worn V-groove, warped flange, aged seal, misalignment
- Symptoms: Interface leaks, pressure fluctuation, rough idle, MIL on
- Solution: Replace C3918685 pipe + C3883284 O-ring; check flange flatness, torque evenly
Get a personalized quote now
1 C3008465 screw plug
2 C3415547 V-type clamp
3 C3883284 O-ring seal
4 C3918685 intake transition pipe
*For other spare parts procurement needs, please contact us!
