Oberdorfer 32409 Gear – OEM Pump Replacement Part
The Oberdorfer 32409 is a pump gear. In a rotary gear pump a pair of meshing gears carries fluid around the outside of the teeth from inlet to outlet, and the close fit between gear, bore and end faces is what creates the positive displacement action.
Abrasives and dry running are what kill gears. Oberdorfer rates this pump family for clear lubricating and non-lubricating fluids in the pH 4 to 11 range, and grit in the fluid will scour the tooth flanks and the bore together.
Confirm the gear against the parts breakdown for your pump model before ordering, as tooth width and shaft fit vary across the range.
Key Features
- Genuine Oberdorfer 32409 pump gear
- Factory material specification
- Machined for the close bore and end clearance the design relies on
- Restores delivered flow and pressure in a worn gear pump
- Designed to run with Oberdorfer stainless shafts and fasteners
Applications
- Fuel and lubricating oil transfer
- Marine gear pump circulation duties
- Industrial process and dosing transfer
- Viscous fluid handling where a centrifugal will not prime
- Overhaul of Oberdorfer rotary gear pumps
Specifications
- Brand: Oberdorfer
- Manufacturer: Ingersoll Rand
- Manufacturer Part Number: 32409
- Part Type: Gear
- Condition: New
Frequently Asked Questions
Q: Should both gears be changed together?
Yes, as a rule. A worn gear meshing with a new one wears the new one quickly and leaves the pump short of its rating.
Q: Why has the pump lost pressure but not flow at zero head?
That pattern is classic internal slip. The gears still move fluid, but clearance lets it return past them as soon as the discharge is restricted.
Q: Can a gear pump run dry while priming?
Only momentarily. These pumps depend on the fluid for lubrication between the gear faces and the bore, and dry running scores both.
Q: Does fluid viscosity affect gear life?
It does. Thin, non-lubricating fluids give the gear faces less to work with, so service intervals on those duties are shorter.
Not sure this is the right part? Send us a Picture of the pump plate on your pump and the CLR Marine team will confirm the correct gear before you order.
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