3806777 Injection Pump Core | Genuine Volvo Penta Part

🔧 Product Description

Core line for an injection pump, held under Fuel System. It holds the refundable charge on the old pump being handed back against an exchange unit. Nothing is shipped against the deposit, which exists only to be cancelled out when the worn pump arrives back. The unit the deposit is raised against is part number 3803777; that is where the pump itself comes from, and the two go on the order together. The line is listed at 22.5 kg. Nothing goes out against the deposit, so read that as the scale weight of the pump coming back for credit - a two-man lift, or one man and a hoist. The lines in this run are not separated by any published engine application, so match the number to the pump coming off rather than trying to identify it by description.

⚙️ Key Features

• Core deposit line, not an injection pump you can fit
• Belongs with the exchange unit, part number 3803777
• Refunded when the old injection pump is returned
• 22.5 kg listed, the return weight to plan freight around
• No engine application published against the line, so order by part number
• Fuel System group

🔌 Function

As a deposit line it does nothing mechanical; the injection pump it belongs to is what puts the fuel under injection pressure and sends a measured shot to each cylinder at the timed point in the cycle.

⚠️ Common Signs of Failure

• This is a deposit line and has nothing to fail in itself; the signs below are what normally condemns the injection pump being exchanged
• Rough or uneven running traced back past the injector to the pump element serving that cylinder
• Stiff or binding drive as the engine is turned over, with the pump loading the timing gear
• The engine down on one bank or one cylinder with no injector, compression or valve fault behind it
• The engine running on after the stop control has been pulled

🛠️ Service Notes

• The charge is refunded when the worn injection pump is returned, so keep the old pump and send it back rather than scrapping it
• Ordering this number on its own supplies no part - it goes on the order beside the exchange unit, part number 3803777
• Send the old pump back complete rather than robbing it for its solenoid, governor or drive gear - an incomplete unit can lose the credit

📦 Condition

• Refundable core deposit - not a physical part