20405847 Valve | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta fuel-system valve used in the injector delivery-pipe and leak-off circuit on D5 and D7 mechanical-injection engines. It regulates low-pressure return flow so the unit-pump supply and injector leak-off circuit retain the required fuel pressure.

🚤 Compatibility

• Engine Family: D, TD, TAD, MD

Full model list at the end of this description.

⚙️ Key Features

• Low-pressure fuel return and overflow-control valve
• Used with Stage 1 and Stage 2 unit injection-pump systems
• Confirmed beside injector leak-off pipes and banjo fittings
• Maintains controlled fuel circulation and removes heated return fuel
• Valve cleanliness and seating are critical to reliable starting and fuel pressure
• Engine type: Volvo Penta four- and six-cylinder mechanical-injection diesel

🔌 Function

Controls return-fuel flow and helps maintain the required low-pressure fuel condition around the unit pumps and injector leak-off circuit.

⚠️ Common Signs of Failure

• Hard starting after the engine has been stopped
• Low fuel-supply pressure
• Excessive return flow or loss of prime
• Fuel leakage around the valve connection
• Valve sticking from dirt or fuel contamination

🛠️ Service Notes

• Work clean — a valve is a precision component, and dirt or swarf carried in on the sealing faces is the commonest reason a new one fails early
• Fit new sealing rings, gaskets or washers wherever the original used them rather than reusing the old ones, and lubricate them lightly so they seat without rolling or nipping
• Check the seat, bore or housing the valve fits into for corrosion, scoring or distortion; a valve only seals as well as the face it beds on
• Tighten fixings and threaded connections to the figures and in the order given in the workshop manual for your engine — a valve body is easily distorted by overtightening
• After fitting, bleed or refill the system as required, then run the engine and check the valve for leaks and for correct operation before the boat is used

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 20581916 - related EDC-system nipple
• 969011 - sealing gaskets
• 20450673 - EDC spacer
• 888768 - related leak-off pipe
• 20550302 - related spacer sleeve / bushing

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D7A-B TA, D7A-T, D7A-TA, D7C-B TA, D7C-TA
• Volvo Penta D5A-B TA, D5A-T, D5A-TA
• Volvo Penta MD2010, MD2010B
• Volvo Penta TAD520GE, TAD520VE
• Volvo Penta TAD530GE MECH, TAD530GE EDC4
• Volvo Penta TAD531GE MECH, TAD531GE EDC4
• Volvo Penta TAD720GE, TAD720VE
• Volvo Penta TAD721GE, TAD721VE
• Volvo Penta TAD722GE, TAD722VE
• Volvo Penta TAD730GE MECH, TAD730GE EDC4
• Volvo Penta TAD731GE MECH, TAD731GE EDC4
• Volvo Penta TD520GE, TD520VE
• Volvo Penta TD720GE, TD720VE PP
• Volvo Penta TAD420VE
• Volvo Penta TAD532GE EDC4
• Volvo Penta TAD620VE
• Volvo Penta TAD732GE EDC4
• Volvo Penta TAD733GE EDC4
• Volvo Penta TD420VE