478955 Castle Nut | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta castle nut from the Engine group, weighing 0.036 kg and listed for 39 applications across the TAD, TWD, TID, TD and TAMD series. It supersedes part numbers 470646, 479666 and 906634. Those numbers were catalogued earlier as a timing gear casing, a round nut and a timing gear casing, so the earlier descriptions do not all match a nut and should be checked against the parts group before ordering.

🚤 Compatibility

• Engine Family: TAD, TWD, TID, TD, TAMD

Full model list at the end of this description.

⚙️ Key Features

• 0.036 kg
• 39 applications across five engine series
• Supersedes 470646, 479666 and 906634
• Two superseded numbers were catalogued as a timing gear casing, which does not match a nut
• Also supersedes Volvo part number 15603

🔌 Function

Retains a shaft or hub against its shoulder, with slots that accept a split pin or lock so it cannot back off.

⚠️ Common Signs of Failure

• Nut found loose with the shaft or hub able to move
• Knock or clonk that appears on load change
• Split pin found sheared, missing or its hole worn oval
• Slots or crown found spread, burred or cracked
• Thread galled or picked up on removal

🛠️ Service Notes

• Two of the superseded numbers were catalogued as a timing gear casing rather than a nut, so confirm against your engine's parts group that this number is what you need
• Always fit a new split pin or lock, never reuse the old one, and tighten to the manual figure before locking

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 478955 → Supersedes 470646 → Supersedes 470218

OEM / Related Numbers

• 479666 earlier number superseded by this part
• 906634 earlier number superseded by this part
• 470646 earlier number superseded by this part
• 470147 earlier number superseded by this part
• 470218 earlier number superseded by this part

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta TAD1030P, TAD1030G, TAD1030GE, TAD1030V
• Volvo Penta TID162AG, TID162AGP, TID162AP, TID162APB
• Volvo Penta TAMD162A, TAMD162C, TAMD162C-B
• Volvo Penta TAD1031G, TAD1031GE
• Volvo Penta TAD1230G, TAD1230V
• Volvo Penta TAD1630G, TAD1630GE
• Volvo Penta TAD1631GE, TAD1631G
• Volvo Penta TWD1210G, TWD1210V
• Volvo Penta TWD1211V, TWD1211G
• Volvo Penta TWD1230ME, TWD1230VE
• Volvo Penta TWD1630G, TWD1630V
• Volvo Penta TAD1032GE
• Volvo Penta TAD1231GE
• Volvo Penta TAD1232GE
• Volvo Penta TAMD163A-A
• Volvo Penta TAMD165A
• Volvo Penta TD1030VE
• Volvo Penta TD1210G
• Volvo Penta TD164KAE
• Volvo Penta TWD1030ME
• Volvo Penta TWD1031VE
• Volvo Penta TWD1231VE
• Volvo Penta TWD1620G