843640 Lock Nut | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta lock nut of the early type, from the Instruments group, weighing 0.032 kg and listed for 46 applications across D, TD, TMD, TAMD, TAD and MD series engines. The early-type marking is the identifier, and plug 843639 at 0.091 kg sits in the same part of the installation.

🚤 Compatibility

• Engine Family: D, TD, TMD, TAMD, TAD, MD

Full model list at the end of this description.

⚙️ Key Features

• Early type
• 0.032 kg
• 46 applications across D, TD, TMD, TAMD, TAD and MD series engines
• Used alongside plug 843639

🔌 Function

Locks the instrument or fitting in its mounting so it cannot work loose with vibration.

⚠️ Common Signs of Failure

• Instrument or fitting working loose in its mounting
• Thread corroded, stretched or cross-cut
• Flats rounded off so a spanner will not grip
• Locking feature no longer holding torque

🛠️ Service Notes

• This is the early type, so compare it with the nut already fitted
• Renew rather than reuse a lock nut that has lost its grip, and check the mating thread while it is off

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta TAMD162C-C, TAMD162A, TAMD162C, TAMD162C-B
• Volvo Penta TD100AHC, TD100ARC, TD100CHC, TD100CRC
• Volvo Penta TD120AHC, TD120ARC, TD120BHC, TD120BRC
• Volvo Penta D5A-B TA, D5A-T, D5A-TA
• Volvo Penta D7A-B TA, D7A-T, D7A-TA
• Volvo Penta TAD120AHC, TAD120BHC, TAD120CHC
• Volvo Penta D100BHC, D100BRC
• Volvo Penta D70CHC, D70CRC
• Volvo Penta MD2010, MD2010B
• Volvo Penta TAMD102A, TAMD102D
• Volvo Penta TAMD122A, TAMD122A/C
• Volvo Penta TAMD165A, TAMD165C
• Volvo Penta TAMD73P-A, TAMD73WJ-A
• Volvo Penta TD121CHC, TD121CRC
• Volvo Penta TD70CHC, TD70CRC
• Volvo Penta TAD121CHC
• Volvo Penta TAMD103A
• Volvo Penta TAMD163A-A
• Volvo Penta TAMD71B
• Volvo Penta TAMD74A
• Volvo Penta TMD102A
• Volvo Penta TMD122A