Cummins Hoses, Clamps & Fittings — part numbers

331 numbers covering coolant hoses, fuel and oil lines, air intake and charge-air hoses, clamps, unions, adaptors and the fittings that join them.

This is the category most often left out of an order and most often responsible for the second shipment. A cooling system job that arrives without the hoses, or an aftercooler removal that arrives without the charge-air hose clamps, is a set standing idle over parts worth very little. When you send us a job scope rather than a parts list, these are the items we will add — and it is worth letting us.

Hoses are also the parts most affected by the operating environment here. High ambient temperatures, heat cycling on standby duty, and ultraviolet exposure on outdoor installations age rubber considerably faster than temperate-climate service intervals assume. On a set that has been in service several years in Berbera or Hargeisa, treat the published hose replacement intervals as optimistic. Squeeze the hoses at the next service: a hose that has gone hard or spongy is telling you something a schedule will not.

Charge-air hoses on turbocharged engines deserve specific attention. They carry hot pressurised air, they fail from the inside where you cannot see it, and a failure dumps boost with immediate effect on performance and exhaust temperature. On the KTA families particularly, these are worth inspecting properly rather than visually.

On tier, quality aftermarket hose and fitting product is entirely legitimate and we quote it openly. The exception is silicone charge-air hose on the large engines, where we recommend the genuine part.

For a quotation, send the engine serial and CPL, and for anything non-standard, photographs with the routing visible and a measurement.