Water Pump - Test

TM 9-2320-312-24-2

Testing and Adjusting Section

2. Heat water in a pan until the temperature of the

water is equal to the fully open temperature

of the water temperature regulator. Refer to

Specifications, "Water Temperature Regulator"

for the fully open temperature of the water

temperature regulator. Stir the water in the pan.

This will distribute the temperature throughout

the pan.

3. Hang the water temperature regulator in the pan

of water. The water temperature regulator must

be below the surface of the water. The water

temperature regulator must be away from the

sides and the bottom of the pan.

g00296313

Illustration 77

4. Keep the water at the correct temperature for

ten minutes.

Pressure test ports for the water pump (Typical example)

(1) Port (alternate heater supply)

5. After ten minutes, remove the water temperature

(2) Port (engine diagnosis)

(3) Port (heater return line)

regulator. Immediately measure the opening

of the water temperature regulator. Refer to

Specifications, "Water Temperature Regulator"

for the minimum opening distance of the

water temperature regulator at the fully open

Making contact with a running engine can cause

temperature.

burns from hot parts and can cause injury from

rotating parts.

If the distance is less than the amount listed in the

manual, replace the water temperature regulator.

When working on an engine that is running, avoid

contact with hot parts and rotating parts.

i01849228

The pressure rise is the difference between inlet

Water Pump - Test

pressure and outlet pressure. The pressure rise

indicates if the water pump operates correctly. Port

SMCS Code: 1361-081

(1) and Port (2) represent the water pump outlet

pressure. Port (3) represents the water pump inlet

Table 23

pressure.

Required Tools

To measure the pressure rise, compare inlet

Part

Part Name

Quantity

pressure with outlet pressure. Calculate the

Number

difference between the pressure of the inlet port

6V-7775

Air Pressure Gauge

and the outlet ports. The pressure rise must add

up to a minimum of 80 kPa (12 psi) under both of

8J-7844

Adapter Fitting

the following conditions:

3K-0360

O-Ring Seal

The engine is at operating temperature.

5P-2725

Probe Seal Adapter

164-2192

Pressure Probe(1)

The engine operates at full load condition.

5P-4487

Adapter

5P-2720

Probe Adapter

(1)

If port (1) is used, two tools are required.