21134362 Idler Pulley | Genuine Volvo Penta Part

🔧 Product Description

A smooth or grooved idler pulley in the TAD16 fan/accessory drive. The sealed bearing supports belt wrap and routing without transmitting power to an accessory.

🚤 Compatibility

• Engine Family: D
• HP Range: 110-220 HP

Full model list at the end of this description.

⚙️ Key Features

• Sealed bearing assembly
• Correct pulley diameter preserves belt geometry
• Machined running surface matches the belt side used at this position
• Designed for continuous generator-engine operation
• Mounting bolt and spacer stack must be retained in the original order
• Engine type: TAD16-series packaged radiator and charge-air-cooler installation

🔌 Function

Guides the drive belt around the specified path, increases belt contact on adjacent pulleys and stabilises the belt span.

⚠️ Common Signs of Failure

• Cracking, glazing or rib/sidewall wear
• Squeal or chirp during acceleration
• Rough pulley bearing or abnormal tensioner movement

🛠️ Service Notes

• Spin the new pulley by hand before fitting — it should turn smoothly and quietly with no roughness, no drag and no side play
• Inspect the belt-contact face of every pulley in the drive whenever the idler is changed; a grooved, glazed, corroded or chipped face will ruin a new belt quickly
• Renew the belt at the same time, and check the tensioner as well, since these parts wear as a system
• Tighten the mounting fastener to the figure given in the workshop manual for your engine, and confirm the pulley runs true and in line with the rest of the drive
• Check the belt routing and that every rib or groove is properly seated before turning the engine over, then recheck tension after the first running period as the manual directs

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D3-220I-G, D3-140A-D, D3-170A-D, D3-200A-D, D3-220A-D, D3-140A-E, D3-170A-E, D3-200A-E, D3-220A-E, D3-140I-E, D3-140A-F, D3-170A-F, D3-200A-F, D3-220A-F, D3-140I-F, D3-140A-G, D3-170A-G, D3-200A-G, D3-220A-G, D3-140I-G, D3-110I-D, D3-150I-D, D3-170I-D, D3-200I-D, D3-220I-D, D3-110I-E, D3-150I-E, D3-170I-E, D3-200I-E, D3-220I-E, D3-110I-F, D3-150I-F, D3-170I-F, D3-200I-F, D3-220I-F, D3-110I-G, D3-150I-G, D3-170I-G, D3-200I-G, D3-110I-H, D3-140A-H, D3-170A-H, D3-200A-H, D3-220A-H, D3-150I-H, D3-170I-H, D3-200I-H, D3-220I-H, D3-140I-H