Aux. Engine: Low Cooling Water Pressure(Jacket Line)

Phenomenon1: large temperature difference between inlet & outlet.

Reasons & Countermeasures:
1. Insufficient cooling water quantity, due to:
a. Defective cooling water pump(damaged/worn impeller).
Countermeasure: maintenance/repair.
b. Contaminated air cooler.
Countermeasure: clean.
c. Clogged piping.
Countermeasure: clean.
d. Improperly regulated water quantity.
Countermeasure: adjustment.
e. Defective cooling water thermostat valve.
Countermeasure: maintenance/repair.
f. Defective cooling water stop valve (seizing).
Countermeasure: maintenance/repair.

2. Air in Cooling Water system.
Countermeasure: Remove air.

Phenomenon2: small temperature difference between inlet and outlet.

Reasons & Countermeasures:
1. Excessively large cooling water quantity, due to:
a. Improperly regulated water quantity.
Countermeasure: adjustment.
b. Defective cooling water thermostat valve.
Countermeasure: maintenance/repair.

Phenomenon3: Low Cooling water Pressure on Low Temperature side.

Reasons & Countermeasures:
1. Contaminated cooler on Low Temperature line.
Countermeasure: clean/ maintenance.

Phenomenon4: Insufficient amount of water in head tank.
Countermeasure: inspection/supply.