21739606 Air Valve | Genuine Volvo Penta Part

🔧 Product Description

Air-control valve installed in the exhaust-brake and aftertreatment arrangement of Volvo Penta TAD8 industrial engines. It regulates the air path associated with the exhaust brake and adjoining exhaust hardware.

🚤 Compatibility

Typically suits:

• Volvo Penta TAD840GE
• Volvo Penta TAD853VE
• Volvo Penta TAD840-43VE
• Volvo Penta TAD850-52VE

• Engine Family: TAD

⚙️ Key Features

• Genuine Volvo Penta control valve
• Factory pressure or flow calibration
• Correct port and sealing geometry
• Designed for the original system circuit
• Engine type: 7.7-litre inline-six industrial diesel

🔌 Function

Opens, closes or diverts system flow according to pressure, temperature or control demand.

⚠️ Common Signs of Failure

• Valve sticking open or closed
• Restricted or uncontrolled flow
• Leakage at the body or seals
• System warning or reduced performance
• Corrosion or deposit build-up

🛠️ Service Notes

• This is the air control for the exhaust brake on TAD8 industrial engines — how quickly and how firmly the brake takes up depends on this valve and on the small-bore air line and union feeding it.
• Check the air line and its union before condemning the valve; a split, chafed or loose pipe produces the same weak or absent braking and is far quicker to rule out.
• The air reaching the valve must be clean and dry — moisture and oil carried over from the air system are the usual reason these valves start to stick or respond slowly.
• The valve sits in the exhaust-brake area and runs hot, so refit any heat shielding and keep the air line routed clear of the exhaust when reassembling.
• Renew the gaskets on any joints you disturb and check the clamp on the exhaust-brake body for distortion — a leaking joint here will upset brake performance even with a sound valve.

🔄 Supersession & Cross Reference

Other-Brand OEM Numbers

• VOE21739606

Aftermarket / Verified Equivalents

• Exhaust brake: 22719433
• Gasket: 21588074
• V-clamp: 21472836
• Pipe: 22504276

📦 Condition

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