Oberdorfer 20002B Ryton Idle Gear for Rotary Gear Pumps
The Oberdorfer 20002B is a genuine OEM idle gear engineered from Ryton, a glass-reinforced polyphenylene sulfide (PPS) thermoplastic built to hold up in demanding pump environments. As the driven half of the gear set inside a rotary gear pump, the idle gear meshes with the drive gear to keep fluid moving smoothly and consistently through the pump housing, and replacing a worn or damaged idle gear with an OEM part like the 20002B helps restore a pump to its original flow rate and pressure performance.
Ryton was chosen for this component because of how it performs where metal gears often struggle. It resists attack from fuels, oils, coolants, and a wide range of industrial fluids, holds its shape and tolerances even after long exposure to moisture, and continues to perform reliably at elevated operating temperatures. Because it does not corrode the way bronze or steel can, a Ryton idle gear tends to run quieter and maintain tighter clearances over time, which translates into steadier pump output and fewer unplanned rebuilds.
While Oberdorfer pumps are well known in marine engine cooling systems, this idle gear is just as much at home in industrial, agricultural, and general fluid-transfer equipment. Maintenance teams, equipment rebuilders, and OEM manufacturers use parts like the 20002B to keep rotary gear pumps running across a wide range of industries.
Key Features
- Precision-molded Ryton (PPS) construction for consistent gear mesh and smooth, quiet rotation
- Strong resistance to fuels, oils, coolants, and many common industrial chemicals
- Rated for reliable performance in elevated-temperature pump environments
- Practically no moisture absorption, which keeps tolerances stable in wet or humid service
- Lighter weight and more corrosion-resistant than traditional bronze or steel idle gears
- Manufactured as a genuine Oberdorfer OEM part for proper fit and long-term durability
Applications
- Industrial fluid transfer and processing equipment
- Agricultural sprayers, irrigation systems, and farm machinery
- Marine engine raw-water and coolant circulation pumps
- Chemical handling and light-duty chemical transfer systems
- Generator, HVAC, and engine cooling pump assemblies
- OEM pump manufacturing and maintenance, repair, and overhaul operations
- General rotary gear pump rebuilds across multiple industries
Specifications
- Manufacturer: Oberdorfer Pumps
- Component Type: Idle Gear (Idler Gear)
- Material: Ryton (PPS – Polyphenylene Sulfide), glass-reinforced engineering thermoplastic
- Chemical Resistance: Resists most solvents, fuels, and industrial fluids
- Moisture Absorption: Practically none, supporting stable dimensional tolerances
- Compatibility: Designed for use in compatible Oberdorfer rotary gear pump assemblies; confirm exact fitment against your pump's model and parts diagram
- Typical Use: Replacement or rebuild-kit component for rotary gear pumps
Frequently Asked Questions
Q: Will the 20002B idle gear fit any Oberdorfer pump?
A: Not every Oberdorfer pump uses the same idle gear, so it's best to confirm the part number against your pump's nameplate or exploded parts diagram before ordering to make sure it matches your specific model.
Q: Is a Ryton idle gear a good replacement for a worn bronze gear?
A: Yes, in most cases. Ryton resists corrosion and chemical wear better than bronze, runs quieter, and holds tight tolerances longer, making it a durable option when rebuilding a rotary gear pump.
Q: Does this idle gear work with pumps outside of marine use?
A: Yes. Oberdorfer gear pumps and their components, including this idle gear, are used in industrial, agricultural, and general liquid-handling equipment in addition to marine applications.
Q: Can I install the 20002B idle gear myself, or do I need a technician?
A: Many equipment owners with basic mechanical experience can replace an idle gear themselves by following the pump manufacturer's service instructions, though a qualified technician is recommended for pumps handling hazardous or pressurized fluids.
Q: Should the idle gear be replaced along with other pump components?
A: It's common practice to replace the idle gear alongside related wear items such as the drive gear, bearings, seals, and O-rings during a full pump rebuild to restore consistent performance.
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