1556489 Leak-Off Line | Genuine Volvo Penta Part

🔧 Product Description

This genuine Volvo Penta leak-off line is a fuel-injection or fuel-return service component used in the fuel-injection leak-off circuit. It is manufactured to the original Volvo Penta dimensions and interface requirements so fuel is transferred or metered through the intended high-pressure or return path. In service, it returns injector leakage fuel to the low-pressure fuel circuit or tank while preventing fuel accumulation around the injectors. Fitment is controlled by the exact engine or product configuration and serialised parts list; confirm OEM number 1556489 against the installed assembly before ordering.

⚙️ Key Features

• OEM Volvo Penta part number 1556489
• Supersedes and replaces previous part number 1543683
• System group: Fuel System
• Net weight: 0.021 kg
• Fits TWD, TID, TD, TAMD and TAD 162, 163, 165, 1620, 1630 and 1631 series engines
• Genuine Volvo Penta replacement component

🔌 Function

Returns injector leakage fuel to the low-pressure fuel circuit or tank while preventing fuel accumulation around the injectors. Keep all openings capped during installation, use the correct sealing hardware, bleed the system fully and inspect for leakage at operating pressure.

⚠️ Common Signs of Failure

• Visible fuel weeping or drips around the injector or line connections
• Hardened, cracked or perished line material from heat and age
• Fuel smell in the engine compartment or fuel residue on the engine top
• Loose or deformed connections that will not seal after refitting
• Air drawn into the fuel system causing rough running or hard starting

🛠️ Service Notes

• Fit new sealing washers or rings at every union the line connects to and never reuse the old ones; once a washer has been crushed it will not reseal
• Keep the line and the unions scrupulously clean and cap the openings while it is off — debris that enters through the return side does the same damage to injectors and pumps as debris on the supply side
• Tighten the union or banjo bolts to the figure in the workshop manual for your engine; they thread into injector and pump bodies and are easily stripped or distorted
• Route the line as it was, without kinks, tight bends or tension, and support it clear of hot and moving parts so it cannot chafe or fatigue
• Bleed and prime the fuel system as the manual describes, then run the engine and check every joint for weeping and for air being drawn in

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 1556489 → Supersedes 1543683

OEM / Related Numbers

• 1543683 earlier number superseded by this part

📦 Condition

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