831720 Ball Bearing | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta ball bearing from the Cooling System group, weighing 0.254 kg and listed for 8 applications on AQ and BB series engines. It supersedes part number 430176, which was catalogued earlier as a shaft.

🚤 Compatibility

Typically suits:

• Volvo Penta AQ170B
• Volvo Penta AQ170C
• Volvo Penta BB170B
• Volvo Penta BB170C
• Volvo Penta AQ165A
• Volvo Penta AQ170A
• Volvo Penta BB165A
• Volvo Penta BB170A

• Engine Family: AQ, BB

⚙️ Key Features

• 0.254 kg
• Supersedes 430176, listed earlier as a shaft
• 8 applications on AQ and BB series engines
• Pump shaft bearing

🔌 Function

Carries the pump shaft's radial and side loads on rolling elements so it turns freely and stays concentric under belt pull.

⚠️ Common Signs of Failure

• Rumbling, growling or grinding from the pump
• Roughness or notchiness felt when the shaft is turned by hand
• Play at the pulley when it is rocked
• Belt running off line as the shaft tilts
• Rust or discoloured grease at the bearing when it is stripped

🛠️ Service Notes

• The number it replaces was listed as a shaft, so check whether the shaft itself is also worn before ordering the bearing alone
• A bearing that has run rough will usually have taken the seal with it, so renew the seal at the same time
• Press the bearing on and off squarely on the correct race, never through the balls

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 831720 → Supersedes 430176

OEM / Related Numbers

• 430176 earlier number superseded by this part

📦 Condition

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