21087704 Pulley | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Pulley - Part Number: 21087704

A genuine Volvo Penta fan-drive pulley used in the TAD732GE/TAD733GE radiator fan and fan-bracket assembly. The pulley forms part of the belt drive around the circulation pump, tensioner and fan hub. Its groove profile, diameter and offset determine belt tracking and the driven fan speed, so a visually similar pulley may not be suitable.

⚙️ Key Features

• OEM fan-drive pulley for radiator 21072151/21188033 installations

• Correct groove profile for V-belt 21087705

• Specified diameter maintains the designed fan and coolant-pump speed

• Machined offset aligns the belt with the fan hub and tensioner

• Requires inspection of bearings, tensioner and adjacent pulleys during replacement

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21087704 (current OEM reference for the specified fan-drive position)

OEM / Related Numbers:

• 21087704

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

Assembly / Service Components:

• 21087705 - matching V-belt

• 20450758 / 21142055 - serial-controlled belt-tensioner references

• 20450764 - additional belt tensioner in the fan drive

• 20450755 - fan hub

• 21034351 - pusher-type fan

• 21034597 - fan adapter

🚤 Compatibility

Commonly used on:

• D7-series generator diesel radiator fan drive

Typically suits:

• Engine models:

• TAD732GE

• TAD733GE

• HP Range: Generator rating dependent; pulley ratio must match the original installation

• Engine Type: D7-series generator diesel radiator fan drive

• Year / Serial Range: Fan-bracket, tensioner and pulley combinations are serial controlled; verify the complete engine and radiator arrangement

🔌 Function

Transfers belt drive to the fan or associated cooling-system component at the specified speed while keeping the belt aligned across the complete accessory-drive path.

Common signs of failure:

• Belt running off-centre or fraying at one edge

• Worn, polished or damaged pulley grooves

• Pulley wobble or excessive runout

• Squeal, vibration or repeated belt failure

• Reduced fan speed and elevated coolant temperature

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging