Maintenance Section
-107-
Cooling System Specifications
Coolant Information
NOTE:
The following information is generic and valid for
lift trucks.
Engine operating temperatures have increased to
improve engine efficiency. This means proper cooling
system maintenance is especially important.
Overheating, overcooling, pitting, cavitation erosion,
cracked heads, piston seizures, and plugged radiators
are classic cooling system failures. In fact, coolant is as
important as the quality of fuel and lubricating oil.
NOTICE
DOOSAN
recommends that the coolant mixture contain
50% commercially available automotive antifreeze, and
50% water.
The coolant mix with concentration of antifreeze smaller
than 30% does not provide sufficient corrosion
protection. Concentrations over 60% adversely affect
freeze protection and heat transfer rates.
Never add coolant to an overheated engine, engine
damage can result. Allow the engine to cool first.
If the machine is to be stored in, or shipped to, an area
with freezing temperatures, the cooling system must be
protected to the lowest expected outside (ambient)
temperature.
The engine cooling system is normally protected to -
28°C(-20°F) with antifreeze, when shipped from the
factory unless special requirements are defined.
Check the specific gravity of the coolant solution
frequently in cold weather to ensure adequate protection.
Clean the cooling system if it is contaminated, the
engine overheats or foaming is observed in the radiator.
Old coolant should be drained, the system cleaned and
new coolant added every 2000 service hours or yearly.
Refer to topic, “Cooling System - Clean, Change” in
Every 2000 Service Hours or Yearly section.
Filling at over 20 liters (5 U.S. gallons) per minute can
cause air pockets in the cooling system.
After draining and refilling the cooling system, operate
the engine with the radiator cap removed until the
coolant reaches normal operating temperature and the
coolant level stabilizes. Add coolant as necessary to fill
the system to the proper level.
Never operate without a thermostat in the cooling
system. Cooling system problems can arise without a
thermostat.
Summary of Contents for D35S-2
Page 31: ...Safety Section 29 Lean away from the direction of fall Lean forward...
Page 39: ...General Section 37 Capacity Chart...
Page 40: ...General Section 38 Capacity Chart...
Page 41: ...General Section 39 Capacity Chart with Side Shifter...
Page 42: ...General Section 40 Capacity Chart with Side Shifter...
Page 43: ...General Section 41 Capacity Chart...
Page 44: ...General Section 42 Capacity Chart...
Page 45: ...General Section 43 Capacity Chart with Side Shifter...
Page 46: ...General Section 44 Capacity Chart with Side Shifter...
Page 47: ...General Section 45 Capacity Chart D G 50C 2...
Page 48: ...General Section 46 Capacity Chart with Side Shifter D G 50C 2...
