1556192 Plug | Genuine Volvo Penta Part

🔧 Product Description

This genuine Volvo Penta plug is a machined connection, housing or closure component used in the engine gallery closure. It is manufactured to the original Volvo Penta dimensions and interface requirements so the adjoining component remains supported, located and sealed at the housing or closure. M20 threaded plug. In service, it closes the designated threaded engine passage and retains the fluid or pressure within it. Fitment is controlled by the exact engine or product configuration and serialised parts list; confirm OEM number 1556192 against the installed assembly before ordering.

🚤 Compatibility

Typically suits:

• Volvo Penta TWD610V
• Volvo Penta TWD710V
• Volvo Penta TWD731VE
• Volvo Penta TWD740GE
• Volvo Penta TWD740VE
• Volvo Penta TID71A
• Volvo Penta TD730VE
• Volvo Penta THD102KB
• Volvo Penta THD102KD
• Volvo Penta THD102K-KB
• Volvo Penta TD71A
• Volvo Penta TD630VE
• Volvo Penta TWD630VE
• Volvo Penta TD610V
• Volvo Penta DH10A
• Volvo Penta TAD730V
• Volvo Penta TAD740GE
• Volvo Penta TAD741GE

• Engine Family: TWD, TID, TD, THD, DH, TAD

⚙️ Key Features

• OEM Volvo Penta part number 1556192
• M20 thread size
• System group: Engine
• Net weight 0.0023 kg
• Supersedes earlier part number 477764
• Fits TD, TID, TWD, THD, TAD and DH series industrial and marine diesel engines

🔌 Function

The plug seals a threaded port or service opening in the engine so oil, coolant or pressure is retained within the intended passage. It can be removed to allow draining, inspection or fitting of a sender or fitting where the port is used for that purpose.

⚠️ Common Signs of Failure

• Oil or coolant seeping or weeping from around the plug
• Corroded, galled or stripped threads that will no longer hold torque
• Damaged or rounded drive recess preventing removal or tightening
• Deformed or scored sealing face causing a persistent leak after retightening
• Plug loosening in service due to vibration, leaving a wet residue trail

🛠️ Service Notes

• Clean the threads and the seating face before fitting, and make sure the opening itself is clear of old sealant, swarf and corrosion
• Renew the sealing washer or O-ring where one is fitted rather than reusing a flattened one, and only use thread sealant where the workshop manual for your engine calls for it
• Tighten to the figure given in the workshop manual for your engine — plugs in aluminium and other soft castings strip easily, and a plug pulled up hard to cure a leak usually distorts the seat and makes it worse
• Where the plug closes an oil, fuel or coolant passage, run the engine up to temperature afterwards and check the joint under pressure before signing the job off
• Keep removed plugs paired with the holes they came out of during a strip-down — plugs of very similar appearance often differ in thread, reach or sealing type

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 1556192 → Supersedes 477764

OEM / Related Numbers

• 477764 earlier number superseded by this part

📦 Condition

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