3925626

3925626 is catalogued as CM660BK-OSCI CUMMINS ISC-8 CRANKSHAFT SEAL FRONT. In service this component seals a joint against pressure, coolant or oil. Low value in itself, and responsible for a disproportionate share of downtime when it lets go. It is catalogued here against the Cummins ISM / ISX.

We hold no alternate or superseded numbers against this part. That usually means it is current, but it is not proof: if the number stamped on the part you are removing differs from this one, send a photograph of the markings before ordering rather than assuming the two are equivalent.

Buyers usually reach this number for one of a small set of reasons: visible weeping or a wet joint face that returns after cleaning; coolant loss with no external leak, or oil and coolant mixing; combustion pressure in the cooling system, or a header tank that pressurises quickly; oil on the underside of the engine after a period standing.

On the ISM and ISX, fitment for fuel system and electronic parts follows the ECM calibration rather than the engine serial alone. Send the calibration where it can be read.

Branded aftermarket gasket product is generally good and we quote it openly. The exception is head gaskets on the large KTA families, where cylinder pressures make the genuine part the sensible purchase and we will say so on the line.

Consumable lines are worth ordering ahead rather than at the point of need. Shelf life is not the constraint; freight is. Consolidating a period's requirement into one shipment through Dubai is materially cheaper per unit than ordering by service interval, and it is the difference between a planned sea shipment and an emergency air freight.

To quote this line accurately we need the engine serial, the CPL, and the scope of work — a single gasket, a head set and a full overhaul set are three different purchases. Orders are confirmed with a 50% deposit, balance on shipment.