Tuthill 2C1B-24 Rotor for 2C Series Cast Iron Gear Pumps
The Tuthill 2C1B-24 is a genuine rotor for Tuthill 2C1B and 4302 size 2 cast iron gear pumps. The rotor is the driven element of an internal gear pump: it carries the internal teeth that mesh with the idler gear either side of the crescent partition, and everything the pump does in terms of flow and pressure depends on how closely it still fits its housing. When a pump has lost capacity and the gasket stack has already been taken up, the rotor is usually the reason.
It is listed as item 15 on both the 2C1B and the 4302 parts lists, which share the same size 2 wet end. A rotor is replaced as a set with the idler gear where both show wear, because fitting a new rotor against a worn idler simply moves the leak path. Handle the new rotor carefully on assembly. A burr raised on an end face during fitting will score the cover on the first run and undo the clearance that has just been set.
Key Features
- Genuine Tuthill rotor
- Direct replacement for 2C1B and 4302 pumps
- Drives the idler gear across the crescent partition to create flow
- Restores volumetric efficiency on a pump that has lost capacity
- Replaced as a set with the idler gear where both show wear
- Sold as the rotor alone for a planned rebuild
Applications
- Lubrication circuits on compressors, gearboxes and engines
- Burner oil and fuel oil transfer and circulation
- Low pressure hydraulic supply circuits
- Heat transfer oil and quench oil service
- Scheduled overhaul of Tuthill rotary gear pumps
- Spares holding for equipment that cannot afford downtime
Specifications
- Brand: Tuthill
- Manufacturer Part Number: 2C1B-24
- Part Type: Rotor
- Fits: Tuthill 2C1B and 4302 size 2 cast iron gear pumps
- Quantity Required: 1
- Condition: New
Frequently Asked Questions
Q: Does a new rotor need the clearance reset?
Yes. Rotor end clearance is set by the cover gasket thickness, so it is checked and adjusted after any rotor change.
Q: What causes rotor wear fastest?
Abrasive particles, fluid with too little lubricity, and running the pump too fast for the viscosity it is handling.
Q: Does the shaft come with it?
Check the parts list for your build. Some listings cover the rotor alone and others cover a rotor and shaft assembly.
Q: How do I know the rotor is worn rather than something else?
Look for a polished or stepped band on the end faces and measurable clearance at the teeth. If capacity is still low after the gasket stack has been taken up, the rotor is the usual cause.
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 rotor.
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