21596642 Control Valve | Genuine Volvo Penta Part

🔧 Product Description

Factory control valve for the exhaust-brake/engine-control circuit used across the listed Volvo Penta TAD12, TAD13, TAD16 and TWD16 industrial engines. Part 21596642 replaces 21452473 and is calibrated for the original actuator and pressure/flow arrangement.

🚤 Compatibility

• Engine Family: TAD, TWD

Full model list at the end of this description.

⚙️ Key Features

• Genuine Volvo Penta engine/exhaust-brake control valve
• Supersedes valve 21452473
• Factory-calibrated ports, flow and actuation
• Used across documented 12.8-litre and 16.1-litre engine families
• Direct replacement only where the catalogue calls for 21596642
• Engine type: 12.8-litre and 16.1-litre inline six-cylinder turbocharged industrial diesel

🔌 Function

Directs or regulates the operating medium that actuates the associated engine-control or exhaust-brake function.

⚠️ Common Signs of Failure

• Exhaust brake or controlled function does not operate
• Delayed, weak or intermittent actuation
• Air/fluid leakage at the valve or connections
• Sticking valve spool caused by contamination
• Engine-control fault code or reduced braking performance

🛠️ Service Notes

• Work clean and cap ports and pipes as they come off — a control valve is a close-fitting part and grit is what kills it
• Find out why the old valve failed: contamination, water or degraded fluid will take the new one out just as fast, so check the fluid and the filters at the same time
• Renew the O-rings, seals and gaskets that come with the valve, lightly lubricated with the system fluid, and make sure the ports and seal faces are clean
• Tighten the valve and its unions evenly to the figures in the workshop manual for your engine or drive; overtightening distorts the body and can make the spool stick
• Refill and bleed the system to the manual's procedure, then test function at low load first and check for leaks and correct operation before normal use

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 21596642 → Supersedes 21452473 → Supersedes 20574702

OEM / Related Numbers

• 21452473 earlier number superseded by this part
• 20574700 earlier number superseded by this part
• 20574690 related valve reference

📦 Condition

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

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta TAD1640GE, TAD1640VE-B, TAD1640-42VE-C
• Volvo Penta TAD1641VE-B, TAD1641GE, TAD1641VE
• Volvo Penta TAD1642VE-B, TAD1642GE, TAD1642VE
• Volvo Penta TAD1650VE-B/51VE, TAD1650GE, TAD1650VE
• Volvo Penta TAD1351GE, TAD1351-53VE
• Volvo Penta TAD1643VE-B, TAD1643VE
• Volvo Penta TAD1350GE
• Volvo Penta TAD1352GE
• Volvo Penta TAD1353GE
• Volvo Penta TAD1354GE
• Volvo Penta TAD1355GE
• Volvo Penta TAD1371-75VE
• Volvo Penta TAD1651GE
• Volvo Penta TAD1660-62VE
• Volvo Penta TAD1662VE EU5
• Volvo Penta TAD1670-72VE
• Volvo Penta TWD1643GE
• Volvo Penta TWD1652GE
• Volvo Penta TWD1653GE
• Volvo Penta TWD1663GE