Spare Parts for John Deere Combine Harvester: 900 1000 4000 6000 7000 Series
What is a water pump bearing？
A water pump bearing is a device used to support the end of the water pump impeller shaft. Fitting securely around the impeller shaft and tightly into the water pump housing, the water pump bearing is designed to withstand the stress and load placed upon the water pump shaft by the engine's accessory-belt drive system. In many cases, the water pump bearing is charged with performing double duty as a bearing for the rotating impeller shaft as well as a seal to prevent the coolant from leaking out of the water pump housing.
The sign of a damaged water pump bearing can come in one of several ways. A squealing sound is a common sound of a failing water pump bearing, however, many bearings have been known to go bad without making a sound. Often, a bad water pump bearing will be noticed by leaking coolant coming out of the bottom or the backside of the water pump. In this event, it is time for a new water pump or a rebuild for the existing pump. In some circumstances, a rebuild kit is not available for the water pump, so a new water pump must be installed when the bearing goes bad in the existing pump