Doosan DX60R Shop Manual page 388

Thermostat
1. Check for proper operation of the thermostat. Place the
thermostat (1, Figure 315) and an accurate thermometer
(2, Figure 315) in warm water.
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 (1, Figure 315) on a cooling system tester.
2. Apply 10.8 - 14.8 psi (75 - 105 kPa; 0.75 - 1.05 kgf/cm
the radiator cap. The radiator cap relief valve must open
within the specified range.
Reassembly of Engine Coolant Pump
1. Reinstall the thermostat (1, Figure 317) and a new O-ring.
2. Reinstall the thermostat cover (2, Figure 317) and a new
gasket. Tighten the thermostat cover bolts.
3. Reinstall the temperature switch (3, Figure 317) and a new
gasket (4, Figure 317)
Installation of Engine Coolant Pump
1. Position the engine coolant pump on the engine and install
a new gasket. Install a new special O-ring (5, Figure 317)
on assembly between the engine coolant pump and the
joint.
Engine
Page 208
Figure 315
2
) to
Figure 316
Figure 317
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