Overview – TURBOCHARGER, HT3B 3801589 Series
The Cummins TURBOCHARGER, HT3B 3801589 fits Cummins N14, L10, M11 and NH/NT 855 heavy-duty diesel engines; because multiple part numbers interchange, we list the related series so you can match what is on your machine.
Parts Characteristics
The HT3B is a wastegate turbocharger built around a cast-iron turbine housing and an aluminium compressor housing. The shaft and wheels are balanced as a single rotating assembly, and the journal bearings are fed by the engine lubricating oil circuit. A calibrated wastegate limits boost so the engine stays inside its safe operating envelope.
Applicable Models & Applications
This turbocharger is fitted to Cummins N14, L10, M11 and 855-family engines used in excavators, generators, marine and heavy trucks. Before ordering, confirm the turbo tag number and the engine arrangement, because several HT3B variants share the same housing.
Maintenance & Replacement
Inspect the turbocharger at every oil-change interval, or at least every 500 service hours. Check boost pressure with a gauge against the Cummins specification, examine the oil feed and return lines for leaks or coking, and confirm the wastegate actuator rod moves freely without seizing. Listen for a rising whine or whistle under load, which points to a failing bearing or shaft.
Replace the unit at the first sign of trouble rather than waiting. Clear warning signs are visible shaft play when you gently wiggle the compressor wheel, a high-pitched whistle, blue or black exhaust smoke, a sudden loss of power, oil traces in the intake tract, or excessive crankcase pressure. Turbos do not recover on their own – running one that is failing quickly takes the engine with it.
When fitting the replacement, let the engine cool first. Disconnect the intake and exhaust clamps, unplug the wastegate hose and any sensor, and remove the oil feed and drain lines (catch the oil). Fit new gaskets, torque the mounting studs to spec, and prime the cartridge by filling the oil feed with clean oil and cranking the engine on the starter without firing it. Reconnect everything, start the engine, and check for leaks before applying load.
Always replace the oil feed line if it shows any coking, and confirm the turbo tag number against your engine arrangement – several HT3B variants share the same housing but differ in trim, so a visual match is not enough on its own.
Price Reference (USD)
Budget roughly USD 450 to USD 1200 for a TURBOCHARGER, HT3B 3801589; volume orders and stock status can move this range either way.
Value & Service
We verify each HT3B against the Cummins tag before dispatch, ship from stocked inventory with traceable sourcing, and back the unit with a usable warranty – so a failed turbo no longer means days of downtime.
Related interchange numbers for the TURBOCHARGER, HT3B: 3801598, 3801613, 3801851, 3801949, 3803199, 3803270, 3803279, 3803671, 3803673 – confirm the exact variant against your model’s parts book before ordering.
Backed by Racer Machinery’s parts expertise, the Cummins TURBOCHARGER, HT3B 3801589 is ready to order with clear documentation and fast delivery to your site.
