20405728 Sealing Ring | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Stop-Solenoid / Cylinder-Block Sealing Ring - Part Number: 20405728

Genuine Volvo Penta sealing ring used at a cylinder-block opening and in the energised-to-run stop-solenoid assembly. The same part number is also included in engine overhaul seal lists, so the exact position must be confirmed from the serial-specific schematic.

⚙️ Key Features

• Oil- and fuel-resistant sealing ring

• Confirmed at the cylinder-block stop-solenoid opening

• Used with energised-to-run stop-solenoid hardware

• Also included in engine overhaul seal arrangements

• Exact groove and component position must be matched before installation

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 20405728 - current Volvo Penta sealing-ring reference

OEM / Related Numbers:

• 20702078 - related block plug for engines without stop solenoid

• 20464561 / 20464563 - related block plugs

• Stop-solenoid body and plunger references vary by control system

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta D5/D7 cylinder-block and stop-solenoid systems

Typically suits:

• Engine / equipment models:

• TD520GE

• TAD530GE

• TAD531GE

• TAD532GE

• TD720GE

• TAD730GE

• TAD731GE

• TAD732GE

• TAD733GE

• Engine Type: Volvo Penta 5- and 7-litre industrial diesel

• Year / Serial Range: Stop-solenoid configuration and engine serial-number dependent

🔌 Function

Seals the stop-solenoid or cylinder-block opening against fuel, oil and contamination leakage.

Common signs of failure:

• Fuel or oil seepage around the solenoid opening

• Air or contamination entering the assembly

• Ring cut, flattened or hardened

• Stop-solenoid sticking after leakage

• Leakage caused by fitting the seal in the wrong groove

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging