AR12270

AR12270 is catalogued as CUMMINS KT450/1150 ENGINE MAIN BEARING STD including thrust washer. In service this component carries load in the rotating or reciprocating assembly. Parts in this group are dimensional: they are matched to a size, and the size fitted at the last overhaul governs what fits now. This number is not mapped to a single engine family in our catalogue, which usually means it spans several builds — send the engine serial and we will confirm fitment against your unit specifically.

This number carries 2 cross-references in our catalogue: CM442BK-EB10, MS-1625P. Buyers routinely search the number stamped on the part they are removing rather than the number that will actually ship, so all of these are searchable here and all of them reach this page. If the number on your old part is not listed, send us a photograph of the markings — supersession chains on the older families run deep and we may still be able to place it.

Buyers usually reach this number for one of a small set of reasons: low or falling oil pressure, particularly at idle when hot; a deep knock that follows load rather than speed; metal in the oil filter or on the sump magnet; oil consumption and blow-by rising together; coolant loss with no external leak, on liner seal failure.

Bearings have a strong branded aftermarket, and several manufacturers who supply original equipment sell the same component under their own name. Where that is the case we will say so and quote it. For liners we lean toward genuine, because block fit and seal groove tolerances are exactly where aftermarket variation shows up in service.

This is a heavy or bulky line. Sea freight LCL through Dubai to Berbera is the economic route and the one we quote by default; air cargo is available where a set is down and the cost is justified. We will normally give you both prices and both dates and let you decide, and where an order mixes urgent and non-urgent lines we will split the shipment rather than hold everything for the slowest item.

To quote this line accurately we need the engine serial, the CPL, whether the block has been bored, and what sizes were fitted at the last overhaul. Photographs of the old shells with the markings visible are often faster than paperwork. Orders are confirmed with a 50% deposit, balance on shipment.