20459850 Rocker Arm | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta TAD420VE/TAD620VE Rocker Arm - Part Number: 20459850

A genuine Volvo Penta rocker arm used in the cylinder-head valve-actuation system. It is supplied as an individual service component under part number 20459850 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 cylinder-head valve-actuation system

• 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:

• 20459850 - Current genuine Volvo Penta service reference

OEM / Related Numbers:

• 20459850 - Rocker arm

• 20459847 / 20459848 / 20459849 - Related rocker-shaft brackets

• 20459851 - Related valve spring

• 20459852 / 20459854 - Related valve seats

• 20459855 - Related valve stem seal

• 20459835 - Related cylinder-head cover

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta TAD420VE industrial diesel engines

• Volvo Penta TAD620VE industrial diesel engines

• Shared D5/D7 cylinder-head, rocker and valve-cover service applications

Typically suits:

• Engine models:

• TAD420VE

• TAD620VE

• Engine Type: Volvo Penta D5/D7 industrial diesel engine family

• HP Range: Determined by the exact engine model and rating

• Year Range: Engine-generation and serial-number controlled

• Serial Applicability: Confirm the cylinder-head casting, valve-cover version and exact schematic position

🔌 Function

Transfers camshaft and push-rod movement to the valve while maintaining the intended valve lift.

Common signs of failure or reasons for replacement:

• Abnormal tapping or knocking develops in the valve train

• Valve lift or valve clearance becomes incorrect

• The rocker pad, bore or shaft surface is scored or excessively worn

• The affected cylinder produces reduced power or uneven running

• Oil supply to the rocker arm is restricted or metal debris is present

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging