HOSE AS 2780618 - Caterpillar

Illustration 1 g01660833
Visually inspect jacket water pump (2) for leaks.Note: If the machine is equipped with the additional retarding (configuration), a second water pump will be installed on the engine.
If equipped, visually inspect auxiliary water pump (1) for leaks.If a continuous drip is found coming from the water pump weep hole when the engine is off, or a constant stream when the engine is running, replace the seals or replace the pump.An intermittent drip coming from the weep hole is an acceptable amount of leakage. Intermittent dripping can start and stop throughout the life of the pump, and is a normal part of the operation of the pump.Wetness or discoloration as a result of dried coolant around the weep hole, without the presence of a continuous drip or a constant stream, is typically another indication of intermittent dripping that is part of the normal operation of the pump. If you are also experiencing low coolant levels, or having to top off coolant frequently, and there is no other source for system coolant loss, replace the pump.For the replacement of the water pump or the water pump seals, refer to Disassembly and Assembly, KENR8726.