Oberdorfer # 7441 Neoprene impeller

Oberdorfer # 7441 Impeller

Oberdorfer # 7441

Oberdorfer catalog # 7441, Flexible Flexible Impeller, made of Neoprene. Impeller has 8 blades/fins, and is 2-9/16 inches wide (65mm) x 2 inches thick (51mm), and has a 5/8 inch (16mm) Brass Spline Drive shaft hub.

Price : $ 140.00

Product Information :

The Oberdorfer impeller # 7441 is a flexible rubber impeller, made of Neoprene, with 8 blades/fins, and is 2-9/16 inches wide (65mm) by 2 inches thick (51mm), and has a 5/8 inch (16mm) Brass Spline Drive shaft hub. This impeller is made from Neoprene rubber material, which is the standard impeller material used for most flexible impellers. It offers a wide range of chemical resistant properties and has a temperature range of 45 degrees F (7 C) to 180 degrees F (82 C). Use Neoprene impellers for engine cooling, and for fresh or salt water transfer duties. Neoprene is the most commonly used material and is suitable for use where only small amounts of oil or diesel fuel are present. Replace all impellers at least once every year, or sooner, depending on the engine duty. When the installation is correct an impeller may last for several years, but it is always advisable to stick to a schedule of preventative, rather than corrective, maintenance. Always carry spare impellers on board in case of emergency. The impeller is one of the most vital components of the engine cooling system and should always be treated as such. Oberdorfer flexible impellers are subjected to rigorous quality processes to ensure reliable, efficient and long lasting performance.

NUMBER of BLADES : 8.

SHAFT HUB TYPE : Spline Drive.

DIMENSIONS : 2-9/16 inches wide (65mm wide), 2 inches thick/deep (51mm), with 5/8 inch (16mm) Spline Drive shaft hub.

Applications:

The Oberdorfer 7441 impeller is a replacement impeller used in Marine Engine Cooling and Bilge applications, as well as Industrial processing applications. After replacing and installing the new impeller, the pump will need up to 30 seconds to prime - DO NOT run dry any longer than 30 seconds as the lack of liquid will damage the impeller. Ensure suction pipework is airtight or the pump will not self-prime.

Impeller Replacement:

Replacing impellers is easy. By removing the end cover screws, it is possible to remove the impeller by using either an Impeller Removal Tool, or channel lock pliers, to grip the hub of the impeller. Don't use screwdrivers as they may damage the face of the pump body, causing leaks, and they can be dangerous in confined spaces.
Always grease new impellers. Firstly, it makes it easier to install the impeller into the pump bore, and secondly it gives added protection to the impeller during initial prime. After replacing the gasket and end cover the pump is ready to use.

Troubleshooting:

This is a replacement impeller.
Depending on how often you use the pump and how hard you are on the impeller you may need to replace this once every few years, or a few times per year.
Note that Flexible Impeller pumps need up to 30 seconds to prime - but do not run dry any longer as lack of liquid will damage the impeller.
If the system does not have liquid in it while the impeller is running for even a minute the impeller can burn out. If this is the case you will see that the impeller end faces are hard, polished, and cracked, like carbon. You may be missing some or all of the blades completely in severe cases. Do not run your impellers dry / without liquid.
The normal end of the flexible impeller is when there are some pieces of a blade or blades missing, and/ or some of the impeller blades are permanently and excessively curved. The blades might also be cracked about half way up their height. Sometimes the impellers can wear out because of system issues like cavitation or air being sucked into the system, and you might see pieces missing from blades tips especially in center of impeller. |