Fuel injection pump JS (Isuzu) 333/E3950 JCB JS, genuine

For the JCB JS crawler excavators: fuel injection pump JS (Isuzu) 333/E3950, a genuine JCB part. According to the product card, the pump is for Isuzu-engined JCB JS290 to JS370 excavators.

The pump is chosen by part number for the engine type and version: pumps for different power versions of the same engine are set differently, and the wrong pump changes power, smoke and fuel use. The pump maker's number on the card identifies its calibration. Before replacing the pump, check the fuel filters, water separator and lift pump, as the cause of failure is often poor supply or dirty fuel, and unless that is fixed a new pump will soon fail too. Older numbers on the card are earlier versions of the same pump. The label on the pump is kept, as it is used to confirm the part number.

Specifications

Compatibility

According to the product card, 333/E3950 is a fuel injection pump. The card also lists 8-98091565-3, 8980915653. Fit is confirmed by the part number. Other parts are in Fuel injection pumps.

Fitting

Before removing the pump, turn the engine until the timing marks line up and mark the position of the pump gear. Cap the fuel line ends at once. Fit the new pump in the timed position following the engine maker's instructions and tighten the connections with new seals to the specified torque. Then bleed the fuel system, without cranking for long on the first start. Once the engine runs, check for fuel leaks, idle, smoke and power, and read the fault codes on electronic systems. In the first hours, keep an eye on fuel consumption and exhaust smoke.