20460039 Diaphragm | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta TAD420VE Allison MT640 Flywheel Diaphragm - Part Number: 20460039

A genuine Volvo Penta diaphragm used in the flywheel coupling and torsional-flexibility assembly. It is supplied as an individual service component under part number 20460039 and is intended to restore the original fit, sealing, alignment, retention or operating function of the specified assembly. This listing supplies the named part only; adjoining components shown in the engine diagram are serviced separately unless explicitly stated.

⚙️ Key Features

• Genuine Volvo Penta service component

• Designed for the flywheel coupling and torsional-flexibility assembly

• Manufactured to the specified OEM dimensions and material requirements

• Suitable for maintenance, repair or overhaul of the matching engine assembly

• Exact engine and serial-number confirmation is recommended before installation

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 20460039 - Current genuine Volvo Penta service reference

OEM / Related Numbers:

• 20460039 - Flywheel diaphragm

• 20460038 - Matching flywheel flange

• 20460194 - Related flywheel

• 21033328 - Related starter ring

• 20460088 - Related retaining screw

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta TAD420VE industrial diesel engines

• Flywheel coupling arrangements for Allison MT640 transmission installations

Typically suits:

• Engine models:

• TAD420VE

• Engine Type: Volvo Penta D5 inline-four industrial diesel

• HP Range: Determined by the exact engine and transmission package

• Year Range: Engine-generation and driveline-configuration controlled

• Serial Applicability: Confirm the Allison MT640 flywheel and coupling arrangement before installation

🔌 Function

Provides controlled flexibility in the flywheel coupling while transmitting engine torque.

Common signs of failure or reasons for replacement:

• Cracks, tears or permanent distortion are visible

• Driveline vibration or coupling noise increases

• The diaphragm no longer transmits torque evenly

• Fastener holes show elongation, fretting or fatigue damage

• Replacement is required after driveline misalignment or overload

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging