20405769 Sealing Ring | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta sealing ring used at the hollow-screw, hose-nipple or remote-filter connection in D5/D7 low-pressure fuel systems. One or two are used according to the fuel-filter and fan-bracket arrangement.

🚤 Compatibility

• Engine Family: D, TD, TAD, MD

Full model list at the end of this description.

⚙️ Key Features

• Fuel-resistant low-pressure sealing ring
• Used beside hollow screw 20405562 and hose nipples
• One or two used according to system layout
• Confirmed in standard, separate-fan-bracket and remote twin-filter systems
• Included in related overhaul seal lists
• Engine type: Volvo Penta 5- and 7-litre industrial diesel

🔌 Function

Seals the assigned low-pressure fuel fitting to prevent diesel leakage and air entry.

⚠️ Common Signs of Failure

• Diesel seepage around the fitting
• Hard starting after shutdown
• Air bubbles in the fuel supply
• Ring flattening, cracking or swelling
• Leakage after fuel-system service

🛠️ 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 Supersession Chain

• 20405769 → Supersedes 11702728

OEM / Related Numbers

• 11702728 earlier number superseded by this part
• 20405562 - hollow screw
• 20405767 - hose nipples
• 20492602 - hose nipples
• 20542732 - fuel pipe
• 20405763 - tube

📦 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 TAD532GE EDC4
• Volvo Penta TAD620VE
• Volvo Penta TAD732GE EDC4
• Volvo Penta TAD733GE EDC4
• Volvo Penta TAD750GE
• Volvo Penta TAD751GE