20405971 Tube | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta rigid transfer tube used between the coolant-pipe flange and charge-air cooler in TAD532GE, TAD730GE and TAD731GE cooling packages. It connects through hose clamps to the cooler and adjacent pipework.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD720GE
• Volvo Penta TAD730GE MECH
• Volvo Penta TAD730GE EDC4
• Volvo Penta TAD731GE MECH
• Volvo Penta TAD731GE EDC4
• Volvo Penta TAD532GE EDC4

• Engine Family: TAD

⚙️ Key Features

• Rigid coolant transfer tube
• Located beside pipes 20405956 and 20405972
• Connects to charge-air cooler 20412361 / 20795871
• Used with two hose clamps 20405755
• Designed for the original radiator and cooler geometry
• Engine type: Volvo Penta 5- and 7-litre turbocharged industrial diesel

🔌 Function

Transfers engine coolant between the rigid coolant pipes and the charge-air cooler circuit.

⚠️ Common Signs of Failure

• Coolant leakage at a hose end
• Tube corrosion, pitting or cracking
• Charge-air temperature increasing
• Hose clamp damage or movement

🛠️ Service Notes

• Fit the tube so it reaches both connections without being sprung into place — a tube pulled into line loads its ends and cracks, usually at a bend or a joint
• Renew the sealing washers, O-rings or gaskets at every connection rather than reusing them, and start each union by hand so you can feel that the thread and seating face are properly engaged before tightening
• Keep the bore clean: cap or plug both ends until the moment of fitting, and never blow debris through a tube into the component it feeds
• Support the tube in its original clips and brackets — an unsupported run will fatigue from engine vibration even though it sealed perfectly when new
• Do not straighten, re-bend or patch a damaged tube; its shape is what gives the correct stress-free fit, and tighten unions only to the figure in the workshop manual for your engine

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 20405956 - related coolant pipes
• 20405972 - related coolant pipes
• 20412342 - adjoining pipe
• 20412341 - gasket
• 20405755 - hose clamps
• 20412361 - charge-air cooler
• 20795871 - charge-air cooler

📦 Condition

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