2445110060 Gear-Type Fuel Transfer Pump Rotor – Diesel Common Rail Low-Pressure Feed Element

Before common rail injectors receive high-pressure fuel, the low-pressure stage must deliver diesel with stable volume and minimal aeration. The 2445110060 gear-type fuel transfer pump rotor is a displacement component inside that low-pressure circuit. It does not generate injection pressure. It creates the suction and feed pressure that allows the high-pressure pump to fill correctly. In common rail systems, poor transfer pump performance quickly becomes a high-pressure problem: unstable rail pressure, hard starting, derate, and accelerated pump wear.

A gear-type transfer pump uses two meshing rotors or gears. As the teeth separate, volume increases and fuel is drawn in. As the teeth mesh, volume decreases and fuel is pushed toward the high-pressure pump. The 2445110060 rotor is one of the rotating displacement members in this arrangement. Its tooth profile, face clearance, tip clearance, and backlash determine how much fuel is moved per revolution. In a common rail diesel system, even a small loss of volumetric efficiency can reduce filling of the high-pressure pump plungers. That affects fuel metering valve authority, rail pressure build-up, and cold-start behavior.

The 2445110060 rotor is not selected by thread size or external shape. It is selected by pump model, tooth count, module, pressure angle, face width, bore diameter, and shaft interface. Typical transfer pump rotors in common rail low-pressure stages operate from around 500 to 3,000 rpm, producing roughly 4–10 bar transfer pressure depending on engine calibration and pump design. Flow capacity is usually matched to the high-pressure pump's filling demand. Critical inspection points include tooth flank wear, scoring, pitting, bore wear, keyway or spline damage, and end-face clearance. A clearance increase of only a few microns can reduce delivery noticeably at low speed, where cranking and hot restart performance are most sensitive.

Many 2445110060 rotors are made from case-hardened alloy steel or high-density powder metal. Surface hardness often falls in the 58–62 HRC range, with fine surface finish on the tooth flanks and bearing bore. Wear is rarely random. Abrasive wear follows contaminated fuel. Cavitation follows inlet restriction or air ingress. Adhesive wear follows low lubricity fuel. Fatigue pitting follows overpressure or long-term cyclic load. Because the transfer pump is upstream of the high-pressure pump, debris generated by a worn rotor can travel into the fuel metering unit and plunger area. This is why a worn 2445110060 rotor should be treated as a system cleanliness issue, not just a flow issue.

The 2445110060 gear-type fuel transfer pump rotor is platform-specific. It may appear under descriptions such as feed pump rotor, transfer pump gear, or low-pressure pump rotor. Cross-reference by the high-pressure pump part number, engine serial number, and OEM catalog. Do not rely on photos alone. Rotors that look similar can differ in rotation direction, helix angle, tooth count, and shaft fit. In common rail service, the safest order information is the pump number, ESN, and original rotor marking.

Does 2445110060 fit every common rail gear pump?
No. It is matched to specific pump families and engine applications. Confirm by pump number and ESN.

What usually destroys a gear-type transfer pump rotor first?
Contaminated fuel, air ingress, inlet restriction, and low fuel lubricity are leading causes.

Can I replace just the rotor and reuse the housing?
Only after measuring housing, cover, and shaft wear. If clearances are out of specification, a rotor-only repair may fail again.

Will a worn rotor always set a rail pressure code?
Not always. It may first appear as hard starting, rough idle, or low power before a code is stored.

What should I check before ordering 2445110060?
Check the high-pressure pump number, engine serial number, tooth count, rotation direction, and original part marking.

How can I prevent repeat transfer pump failure?
Correct fuel contamination, replace filters on schedule, repair air leaks, and verify inlet and return line restrictions.