20405510 Gasket | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta gasket fitted between the governor hood and housing. It is used with governor housing 20460275 and hood references including 20460077 or 20460273.

🚤 Compatibility

Typically suits:

• Volvo Penta D5A-B TA
• Volvo Penta D5A-T
• Volvo Penta D5A-TA
• Volvo Penta TD420VE
• Volvo Penta D7A-B TA
• Volvo Penta D7A-T
• Volvo Penta D7A-TA
• Volvo Penta D7C-B TA
• Volvo Penta D7C-TA
• Volvo Penta TAD620VE
• Volvo Penta TAD420VE
• Volvo Penta MD2010
• Volvo Penta MD2010B

• Engine Family: D, TD, TAD, MD

⚙️ Key Features

• Dedicated mechanical-governor gasket
• Installed at the documented governor
• Suitable for 1500, 1800, 1900 and 2300 rpm governor variants where listed
• Seals fuel, oil, air or control passages within the governor assembly
• Should be renewed whenever the adjoining governor components are separated
• Engine type: Volvo Penta D4, D5 and D7 mechanical-governed industrial diesel

🔌 Function

Seals its assigned governor housing or cover joint so the speed-control piston, levers and pressure passages operate without leakage.

⚠️ Common Signs of Failure

• Fuel or oil seepage from the governor
• Unstable idle or governed speed
• Poor throttle response
• Air or contamination entering the governor housing
• Gasket hardening, tearing or extrusion

🛠️ Service Notes

• Fit a new gasket every time the joint is disturbed — a gasket takes a permanent set once it has been torqued and will not seal reliably a second time
• Scrape both faces back to clean bare metal, keeping the blade at a shallow angle so it lifts the old material without gouging the surface, and use a plastic scraper on aluminium castings
• Check the faces for flatness, cracks and corrosion pitting, and make sure no old gasket, carbon or hardened sealant is left in the corners or around the bolt holes
• Fit the gasket dry unless the workshop manual for your engine calls for a sealant, and then only the type it specifies — surplus sealant squeezes out into oil, coolant and fuel passages
• Draw the fasteners down progressively in the sequence and to the torque given in the manual for your engine, and recheck after the first heat cycle where the manual asks for it

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 20590563 - related TD/TAD governor references
• 20590571 - related TD/TAD governor references
• 21120693 - related governor references
• 20700657 - related governor references
• 20412752 - related governor covers
• 20505913 - related governor covers
• 20460275 - governor housing
• 20405867 - control rods
• 20405868 - control rods
• 20460068 - related six-point socket screw

📦 Condition

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