20412445 Sealing Ring | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta sealing ring used around the instrument jack housing.

🚤 Compatibility

Typically suits:

• Volvo Penta TD720GE
• Volvo Penta TD520GE
• Volvo Penta TAD720GE
• Volvo Penta TAD721GE
• Volvo Penta TAD722GE
• Volvo Penta TAD730GE MECH
• Volvo Penta TAD730GE EDC4
• Volvo Penta TAD731GE MECH
• Volvo Penta TAD731GE EDC4
• Volvo Penta TAD732GE EDC4
• Volvo Penta TAD733GE EDC4
• Volvo Penta TAD520GE
• Volvo Penta TAD530GE MECH
• Volvo Penta TAD530GE EDC4
• Volvo Penta TAD531GE MECH
• Volvo Penta TAD531GE EDC4
• Volvo Penta TAD532GE EDC4

• Engine Family: TD, TAD

⚙️ Key Features

• Part of the complete three-jack instrument connection
• Confirmed across D5 and D7 electrical-materials assemblies
• Used with jacks 20405863 and cable 20405780
• Maintains connector alignment and environmental protection
• Exact installation position must match the original panel
• Engine type: Volvo Penta 5- and 7-litre industrial diesel

🔌 Function

Seals the jack housing against moisture, dust and vibration.

⚠️ Common Signs of Failure

• Loose or intermittent instrument connection
• Moisture or corrosion at the jack assembly
• Cracked or distorted mounting component
• Instrument readings dropping out under vibration
• Housing no longer retained or sealed

🛠️ Service Notes

• Always fit a new sealing ring rather than reusing the old one — a ring that has been compressed once has taken a set and will not seal reliably a second time
• Clean the groove or seat and check it for scoring, corrosion and old sealant before fitting; a mark across the sealing face will leak however good the ring is
• Ease the ring into place without stretching, twisting or dragging it over sharp edges or threads, and check it is seated squarely all the way round before closing the joint
• Do not add sealant or jointing compound unless the workshop manual for your engine calls for it, and tighten the joint or union to the figure given in that manual
• Check the joint for weeping once the engine has been run up to temperature and allowed to cool, as many sealing rings only show a leak after a heat cycle

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 20405863 - electrical jacks, quantity three
• 20405780 - cable
• 20405781 - connector
• 20405782 - pin connectors
• 20405783 - terminal gaskets

📦 Condition

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