Oberdorfer CB9000L Gear – Cast Iron Replacement Part
Gear pumps deliver a steady flow against pressure and will pull a useful suction lift, which is why they end up on fuel transfer, oil circulation and dosing duties. The Oberdorfer CB9000L in cast iron is the factory gear for that service.
Gear wear shows up as reduced output at pressure. Clearance between the tooth tips and the bore grows, fluid slips back past the gears instead of going out the discharge, and the pump that used to hold its rating starts falling off under load.
Handle the tooth flanks carefully and assemble clean. A nick on a tooth tip becomes a leak path across the mesh.
Key Features
- Genuine Oberdorfer CB9000L pump gear
- Cast in cast iron
- 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: CB9000L
- Part Type: Gear
- Material: Cast iron
- 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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