21400696 Cover | Genuine Volvo Penta Part

🔧 Product Description

Genuine cover for the engine-mounted seawater strainer used on selected Volvo Penta D4 and D6 marine diesel engines. The cover closes the filter housing, compresses the sealing ring and allows access to the removable strainer for inspection and cleaning.

🚤 Compatibility

• Engine Family: D
• HP Range: 210-435 HP

Full model list at the end of this description.

⚙️ Key Features

• Seawater-filter housing cover
• Confirmed in the D6-280A-A raw-water cooling assembly
• Used with filter housing 3583342 and sealing ring 3583340
• Provides service access to strainer 3583341
• Designed for seawater exposure and pump-suction vacuum
• Cover seating surface must remain clean and undamaged

🔌 Function

The cover seals the top of the seawater filter while allowing the strainer element to be removed for routine cleaning.

⚠️ Common Signs of Failure

• Raw-water leakage
• Air entering the seawater-pump suction
• Engine overheating caused by loss of pump prime
• Cover difficult to remove because of corrosion or overtightening

🛠️ Service Notes

• Clean both sealing faces back to clean metal and check the cover for distortion, cracks or pulled bolt holes before refitting — a warped flange will not seal even with a new gasket
• Where the joint uses a gasket, seal or O-ring, always fit a new one and seat it dry unless the workshop manual for your engine specifies a sealant; never try to make a poor joint tight with extra sealant
• Tighten the fasteners progressively and evenly, working out from the centre, to the figure given in the manual for your engine — pressed steel, alloy and plastic covers distort easily if pulled down hard or unevenly
• If the cover carries a shaft seal or bearing, support it square to the shaft as it goes on so the seal lip is not nicked or rolled over
• Check that any breather, drain or oil return passage in the cover is clear before final tightening, and look for leaks once the engine has been run up to temperature

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 3889148 - Complete seawater filter
• 3583342 - Strainer housing
• 3583341 - Strainer element
• 3583340 - Sealing ring
• 3583339 - Pressure plate
• 21400685 - Related service kit
• 21400686 - Mounting bracket
• 21457174 - Handle
• 942001 - Hex socket screw
• 963105 - Lock nut

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D6-370A-C, D6-350A-A, D6-350A-B, D6-330A-D, D6-370D-B, D6-330D-B, D6-370D-A, D6-330D-C, D6-330A-C, D6-370D-C, D6-330D-D, D6-370D-D, D6-370A-D, D6-310D-B, D6-310D-D, D6-310D-C, D6-310A-B, D6-280A-C, D6-310A-A, D6-280A-D, D6-280A-A, D6-280A-B, D6-435D-A, D6-435D-D, D6-435D-C, D6-330A-B, D6-370A-B
• Volvo Penta D4-260A-B, D4-260A-A, D4-260A-C, D4-260A-D, D4-260D-B, D4-260D-C, D4-260D-D, D4-300A-A, D4-300A-C, D4-300A-D, D4-300D-A, D4-300D-C, D4-300D-D, D4-210A-A, D4-210A-B, D4-225A-B, D4-225A-C, D4-225A-D, D4-225I-B