840094 Check Valve | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta check valve from the Fuel System group, included in the fuel injection pump, weighing 0.024 kg and listed for 5 applications on MD series engines. It supersedes part number 6603081, which was catalogued earlier as a hollow screw.

🚤 Compatibility

Typically suits:

• Volvo Penta MD7B
• Volvo Penta MD6A
• Volvo Penta MD6B
• Volvo Penta MD7A
• Volvo Penta MD67C

• Engine Family: MD

⚙️ Key Features

• Included in the fuel injection pump
• 0.024 kg
• 5 published applications on MD series engines
• Supersedes 6603081, formerly a hollow screw

🔌 Function

Lets fuel pass in one direction only, holding pressure in the delivery side and stopping return flow.

⚠️ Common Signs of Failure

• Hard starting after the engine has stood
• Fuel draining back and letting air into the line
• Rough running or hunting at idle
• Seat or ball pitted, sticking or held open by debris
• Weeping at the valve body when under pressure

🛠️ Service Notes

• The valve sits in the injection pump, so injection timing and pump work should be checked at the same time
• The number it replaces was listed as a hollow screw, so an engine may show either name in older records
• Fit a new sealing washer and bleed the fuel system after assembly

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 840094 → Supersedes 6603081

OEM / Related Numbers

• 6603081 earlier number superseded by this part

📦 Condition

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