PLATE 4218472 - Caterpillar

Replace the impeller each time the components of the pump are inspected. Refer to the Disassembly and Assembly Manual for the process.Inspect the components of the pump more frequently when the pump is exposed to debris, sand, or other abrasive materials. Inspect the components if the pump is operating at a differential pressure of more than 103 kPa (15 psi).Check the following components for wear and check the following components for damage:
Cam
Impeller
Seals
Wear plate
End coverIf wear is found or if damage is found, replace the components which are worn or replace the components which are damaged. Use the proper repair kit for the pump. Refer to the Disassembly and Assembly for more information on servicing the auxiliary water pump.