21294973 Rocker Arm Shaft | Genuine Volvo Penta Part

🔧 Product Description

A precision-machined shaft supporting the intake and exhaust rocker arms on selected Volvo Penta TAD7 cylinder heads.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD752GE
• Volvo Penta TAD753GE
• Volvo Penta TAD754GE
• Volvo Penta TAD765VE
• Volvo Penta TAD764VE
• Volvo Penta TAD763VE
• Volvo Penta TAD762VE
• Volvo Penta TAD761VE

• Engine Family: TAD

⚙️ Key Features

• Provides the rocker arms with an aligned pivot surface
• Incorporates oil passages for valve-train lubrication
• Designed for selected TAD7 engine cylinder heads
• Engine type: Six-cylinder turbocharged generating-set diesel

🔌 Function

Supports the rocker arms and distributes lubricating oil through the valve-train assembly.

⚠️ Common Signs of Failure

• Excessive valve-train noise
• Worn or scored shaft surface
• Low oil flow to the rocker arms
• Excessive rocker-arm side play
• Repeated rocker-bushing wear

🛠️ Service Notes

• Check the shaft and the rocker bushes for wear, scoring and ovality and measure them against the figures in the manual for your engine — a worn shaft will ruin new rockers
• Make sure the oil feed holes in the shaft are clear and face the way the procedure for your engine specifies, and that the supply drilling in the head or pedestal is clear; a blocked or misaligned feed starves the whole rocker gear
• Rebuild the shaft in its original order and orientation, keeping rockers, spacers, springs and pedestals in the positions they came from
• Coat the shaft and bushes with clean engine oil before assembly and turn the assembly by hand to confirm every rocker moves freely
• Tighten the pedestals down evenly and in stages so the shaft is not pulled out of straight, then set the valve clearances by the procedure for your engine and prime the valve gear with oil before starting

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21294973 → Supersedes 21160803 → Supersedes 20861310

OEM / Related Numbers

• 21160803 earlier number superseded by this part
• 20861310 earlier number superseded by this part
• 3801237, 3801471, 22243674 and 3801588 - related cylinder heads
• 21242550 - intake rocker arm
• 21242533 - exhaust rocker arm
• 20861884 - valve bridge
• 20799622 - plug
• 945495 - snap ring
• 20800018 - spring

📦 Condition

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