21406638 Rocker Arm | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta D13 Exhaust Rocker Arm - Part Number: 21406638

A complete exhaust-valve rocker arm used in selected Volvo Penta TAD13 industrial engines. It transfers camshaft motion through the rocker mechanism to the exhaust valve and incorporates the hydraulic and mechanical components required by the applicable valve-train design.

⚙️ Key Features

• Genuine Volvo Penta exhaust rocker arm

• Designed for D13 valve-train loads

• Precision roller, pivot and valve-contact surfaces

• Works with the original rocker shaft, ball socket and adjusting components

• Six normally required on a six-cylinder engine when this rocker type is fitted

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21406638 (catalogued rocker-arm reference)

• 22472567 - related later service rocker-arm reference; serial applicability must be confirmed

OEM / Related Numbers:

• 20934233

• 21026822

• 21040968

• 21316076

• 21054149 - ball socket

• 944364 - O-ring

• 20917877 - piston

• 20581555 - compression spring

Aftermarket / Verified Equivalents:

• Blumaq VOE21406638 compatible rocker arm

• Non-OE D13 exhaust rocker arm cross-referenced to 20934233, 21026822 and 21040968

🚤 Compatibility

Commonly used on:

• Volvo Penta TAD13 exhaust valve-train assemblies

Typically suits:

• Engine models:

• TAD1351VE

• TAD1352VE

• TAD1353VE

• Related D13 industrial engines using rocker-arm specification 21406638

• HP Range: Engine-rating dependent

• Engine Type: D13 inline-six turbocharged industrial diesel

• Year Range: Cylinder-head, emissions specification and engine-serial dependent

🔌 Function

Transfers camshaft movement to the exhaust valve and controls the valve opening and closing event.

Common signs of failure:

• Excessive valve-train ticking or knocking

• Worn roller or valve-contact pad

• Incorrect valve clearance

• Reduced cylinder performance

• Metal debris beneath the rocker cover

• Valve, camshaft or rocker-shaft damage

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging