Doosan D30S-5 Instrukcja Obsługi Pobierz pdf (Strona 209)

4TNV98 & 4TNE98 Diesel Engine Section 5. Cooling System 207

Disassembly of Engine Coolant Pump

1. Remove the thermostat cover (Figure 8-8, (1)).

Discard the gasket.

Figure 8-8

2. Remove the thermostat (Figure 8-8, (2)). Discard

the O-ring. Remove the temperature switch

(Figure 8-8, (3)) and gasket (Figure 8-8, (4)).

Discard the gasket.

Cleaning and Inspection

Thermostat

1. Check for proper operation of the thermostat.

Place the thermostat (Figure 8-10, (1)) and an

accurate thermometer (Figure 8 -10, (2)) in

warm water.

Figure 8-10

2. Slowly increase the temperature of the water

using an external heat source.

3. The thermostat is operating properly if it starts to

open at the temperature value stamped on the

flange of the thermostat, and fully opens as the

temperature of the water is increased.

Radiator Cap

1. Check for proper operation of the radiator cap.

Install the radiator cap (Figure 8-11, (1)) on a

cooling system tester.

Figure 8-11

2. Apply 10.8 - 14.8 psi (75 - 105 kPa; 0.75 - 1.05

kgf/cm²) to the radiator cap. The radiator cap

relief valve must open within the specified range.

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Doosan D30S-5 Instrukcja Obsługi Strona 209