21739017 Pipe | Genuine Volvo Penta Part

🔧 Product Description

High-pressure common-rail fuel pipe connecting rail 21675446 to the injector on cylinder 4. The pipe is factory formed for the cylinder position and must never be rebent or reused after its sealing cones have been damaged.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD880-82GE
• Volvo Penta TAD880-84VE
• Volvo Penta TAD870-73VE
• Volvo Penta TADH880-82GE
• Volvo Penta TADH880-84VE

• Engine Family: TAD, TADH

⚙️ Key Features

• Cylinder position: 4
• Factory-formed bends and sealing cones
• Used with common rail 21675446
• Single-cylinder replacement pipe
• Engine type: 7.7-litre inline-six electronically controlled diesel

🔌 Function

Carries high-pressure fuel from the common rail to injector number 4 without pressure loss or leakage.

⚠️ Common Signs of Failure

• Diesel leakage or wetness at a union
• Hard starting or cylinder imbalance
• Cracked or chafed pipe
• Damaged sealing cone caused by reuse or overtightening

🛠️ Service Notes

• Offer the pipe up and check it reaches both connections freely before you tighten anything — a rigid pipe pulled into place is a pipe left under permanent strain, and strained pipes crack at the fittings in service
• Renew the sealing washers, O-rings or union seals that go with the pipe rather than reusing the old ones, and make sure the seats, faces and threads are clean
• Keep the ends capped while you work and blow or flush a pipe through before fitting; anything left inside goes straight into the oil, fuel or coolant system
• Tighten unions and banjo bolts evenly to the figures in the workshop manual for your engine — overtightening distorts the seat and starts the leak you were trying to cure
• Refit every clip and support bracket in its original place and keep the pipe clear of hot or moving parts so it cannot chafe or be shaken to failure

🔄 Supersession & Cross Reference

Other-Brand OEM Numbers

• VOE21739017

OEM Reman Alternatives

• Injector reman references: 3801582 → 3801855
• Injector reman references: 3801624 → 3801855

Aftermarket / Verified Equivalents

• Common rail: 21675446
• Relief valve: 21880675
• Rail pressure sensor: 21880678
• Injector references: 22490430 → 23088481

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging