TUBE AS 4700864 - Caterpillar

and seals require periodic inspection. Impellers have a service life that is limited. The service life depends on the engine operating conditions.Inspect the components more frequently when the pump is exposed to debris, sand, or other abrasive materials.Refer to Disassembly and Assembly, "Auxiliary Water Pump - Remove" to remove the auxiliary water pump. Refer to Disassembly and Assembly, "Auxiliary Water Pump - Disassemble" to disassemble the auxiliary water pump.Inspect the following components for wear or damage:
Bearings
Impeller
Seals
Wear plateIf wear or damage is found, replace the components which are worn or damaged. Use the proper repair kit for the pump.Refer to Disassembly and Assembly, "Auxiliary Water Pump - Assemble" to assemble the auxiliary water pump. Refer to Disassembly and Assembly, "Auxiliary Water Pump - Install" to install the auxiliary water pump.