943821 Sealing Ring | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta sealing ring listed for 70 applications across MD, TMD, D, TD, AQD and TID series engines. It supersedes 422128, which was catalogued earlier as a bearing housing - so a search against the old number may return a housing listing rather than a ring, and the description is worth checking before you accept it.

🚤 Compatibility

• Engine Family: MD, TMD, D, TD, AQD, TID, TAMD, THAMD, TAD

Full model list at the end of this description.

⚙️ Key Features

• 70 applications across MD, TMD, D, TD, AQD and TID engines
• Supersedes 422128
• 422128 was catalogued earlier as a bearing housing

🔌 Function

Seals a joint or shaft against leakage, holding fluid on one side and keeping water and dirt out on the other.

⚠️ Common Signs of Failure

• Oil or fluid seeping from the joint or running down from the shaft
• Level dropping with no other leak apparent
• Ring found hardened, flattened or split on removal
• Milky or emulsified oil where water has been getting past
• Housing or shaft face scored, pitted or corroded

🛠️ Service Notes

• Check the sealing surface for a wear groove - a new ring on a grooved shaft or face will leak again
• Lubricate the ring before assembly so it is not nipped or rolled as it goes in

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 943821 → Supersedes 422128

OEM / Related Numbers

• 422128 earlier number superseded by this part

Aftermarket / Verified Equivalents

• SLP: VR-821

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta TD100AHC, TD100ARC, TD100G-85, TD100A, TD100AG, TD100G, TD100GG, TD100GGP, TD100HP, TD100HPB, TD100GG-85, TD100GP, TD100GP-85
• Volvo Penta TID100KG, TID100KGP, TID100K, TID100K-87, TID100KGP-87, TID100KP, TID100KP-87, TID100KPB-87
• Volvo Penta TD120C, TD120A, TD120G, TD120GG PP, TD120GG, TD120AHC, TD120ARC
• Volvo Penta AQD70B, AQD70BL, AQD70CL, AQD70D, AQD70C
• Volvo Penta D100A, D100BHC, D100BRC, D100B
• Volvo Penta TAMD70B, TAMD70E, TAMD70C, TAMD70D
• Volvo Penta TD70CHC, TD70CRC, TD70G, TD70B
• Volvo Penta D70CHC, D70CRC, D70B
• Volvo Penta MD100A, MD100B, MD100B-CC
• Volvo Penta AQD21A, AQD21B
• Volvo Penta MD21B, MD21A
• Volvo Penta MD70B, MD70C
• Volvo Penta THAMD70C, THAMD70B
• Volvo Penta TMD70C, TMD70B
• Volvo Penta D120A
• Volvo Penta D42A
• Volvo Penta MD120A
• Volvo Penta TAD120AHC
• Volvo Penta TAMD120A
• Volvo Penta TID120FG
• Volvo Penta TID70G
• Volvo Penta TMD100A
• Volvo Penta TMD120A