1638090 Injection Timing Device | Genuine Volvo Penta Part

🔧 Product Description

This is a genuine Volvo Penta injection timing device from the fuel system group, fitted to TWD630ME and TWD630VE marine diesel engines. It controls the point of injection relative to crankshaft position so fuel delivery stays correctly phased across the engine's speed and load range. This current part number supersedes the earlier 1638130 timing device.

🚤 Compatibility

Typically suits:

• Volvo Penta TWD630ME
• Volvo Penta TWD630VE

• Engine Family: TWD

⚙️ Key Features

• Complete hydraulic-mechanical injection timing device
• Confirmed for the TWD630ME fuel system
• Works with timing gear 479985 and oil-pressure pipe 420945
• Contains precision bearing, bushing, thrust and sealing interfaces
• Fuel-pump timing must be set and verified after installation
• Engine type: Volvo Penta TWD6 diesel

🔌 Function

The injection timing device advances or retards the start of fuel injection in relation to engine speed, keeping combustion timing correct throughout the operating range. Correct timing is essential for clean starting, rated power output and controlled exhaust emissions.

⚠️ Common Signs of Failure

• Hard starting or extended cranking, particularly when cold
• Loss of power or poor throttle response under load
• Excessive black or white exhaust smoke
• Rough running, knocking or uneven engine note at certain speeds
• Increased fuel consumption with no other identifiable cause

🛠️ Service Notes

• Supersedes 1638130 — an older parts list under that number now calls up this device
• Fitted with timing gear 479985 and oil-pressure pipe 420945; check both are the correct current specification when replacing the timing device
• Injection timing is calibration work — have the setting checked and verified on the correct test equipment once fitted, and confirm engine designation and serial before ordering since this is listed against TWD630ME/VE specifically

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 1638090 → Supersedes 1638130

OEM / Related Numbers

• 1638130 earlier number superseded by this part
• 477554 - bearing housing
• 477551 - bushing
• 1638218 - related bushing
• 1546221 - sealing ring
• 477409 - thrust washer
• 479985 - timing gear
• 420945 - oil-pressure pipe
• 950545 - pin

📦 Condition

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