21406638 Rocker Arm | Genuine Volvo Penta Part

🔧 Product Description

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.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD1371-75VE
• Volvo Penta TAD1351-53VE

• Engine Family: TAD

⚙️ 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
• Engine type: D13 inline-six turbocharged industrial diesel
• Quantity varies by assembly, most commonly six

🔌 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

🛠️ Service Notes

• Keep the rocker arms in their fitted order if any are being refitted, and check the arms, the shaft or pivot and the pad or roller face for pitting, scoring and uneven wear
• Make sure the oil feed holes and any drilling through the arm are clear and flushed, and prime the contact faces with clean engine oil before assembly
• Confirm the pushrods are seated in their cups and the valve gear is correctly located before pulling the rocker shaft or pedestals down, then tighten evenly in the sequence and to the figures in the manual for your engine
• Set the valve clearances with the engine at the crank position the manual specifies for that cylinder, and recheck them once the pedestal bolts are fully torqued
• Turn the engine over by hand through a complete cycle to confirm nothing binds, and recheck the clearances after the first period of running if the manual requires it

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21406638 → Supersedes 21277402 → Supersedes 21209536 → Supersedes 21205795 → Supersedes 21165788 → Supersedes 21046041

OEM / Related Numbers

• 22472567 earlier number superseded by this part
• 21277402 earlier number superseded by this part
• 21209536 earlier number superseded by this part
• 21205795 earlier number superseded by this part
• 21165788 earlier number superseded by this part
• 21046041 earlier number superseded by this part
• 20934233 related reference
• 21026822 related reference
• 21040968 related reference
• 21316076 related reference
• 21054149 - ball socket
• 944364 - O-ring
• 20917877 - piston
• 20581555 - compression spring

Other-Brand OEM Numbers

• Blumaq VOE21406638 compatible rocker arm

📦 Condition

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