861969 Woodruff Key | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta woodruff key from the Engine group, weighing 0.002 kg and listed for 38 applications across the D and MD series. It supersedes part numbers 3812129 and 861981, catalogued earlier as a key and a shaft key, so older parts lists show the same item under two different descriptions.

🚤 Compatibility

• Engine Family: D, MD
• HP Range: 13-75 HP

Full model list at the end of this description.

⚙️ Key Features

• 0.002 kg
• Supersedes 3812129 and 861981
• Both earlier numbers were catalogued as a key and a shaft key
• 38 applications across the D and MD series

🔌 Function

Sits in a half-moon slot in the shaft and keys the hub to it, so drive is taken by the key rather than by friction on the taper or bore.

⚠️ Common Signs of Failure

• Hub or pulley found rotated on its shaft, with timing or alignment marks out of register
• Key sheared, rolled over or picked out of its slot in pieces
• Keyway in the shaft or hub hammered wide or bell-mouthed
• Rhythmic knock or a slipping drive under load

🛠️ Service Notes

• A sheared key is almost always a symptom of a loose hub - check the fixing torque and the taper contact before blaming the key
• Renew the key rather than reusing it, and inspect both keyways for hammering before assembly

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 861969 → Supersedes 3812129

OEM / Related Numbers

• 861981 earlier number superseded by this part
• 3812129 earlier number superseded by this part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 D2-40, D2-40B, D2-40F, D2-55, D2-55B, D2-55C, D2-55D, D2-55E, D2-55F, D2-50F, D2-75, D2-75B, D2-75C, D2-75F, D2-60F
• Volvo Penta D1-30, D1-30B, D1-30F, D1-13F, D1-20, D1-20B, D1-20F
• Volvo Penta MD2010, MD2010B, MD2010-C, MD2010-D
• Volvo Penta MD2020, MD2020B, MD2020-C, MD2020-D
• Volvo Penta MD2030, MD2030B, MD2030-C, MD2030-D
• Volvo Penta MD2040, MD2040B, MD2040-C, MD2040-D