3406E and 3456 Industrial Engines Testing and Adjusting – Water Pump – Test

Table 1
Tools Needed
Part Number Part Name Quantity
6V-7775 Air Pressure Gauge 1

Illustration 1 g00300304
Typical example

(1) Water outlet

(2) Port

(3) Temperature regulator housing

(4) Water manifold assembly

(5) Coolant temperature sensor

(6) Port

(7) Water pump

Perform the following procedure in order to determine if the water pump is operating correctly:


  1. Remove the plug from port (2).


  1. Install the 6V-7775 Air Pressure Gauge in port (2) .


  1. Start the engine. Run the engine until the coolant is at operating temperature.


  1. Note the water pump pressure. The water pump pressure should be 100 to 125 kPa (15 to 18 psi).

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