60
SEBU8337
Maintenance Section
Cooling System Coolant Level - Check
i01197583
Cooling System Coolant Level
- Check
Check the coolant level when the engine is stopped
and cool.
g00285520
Illustration 23
Cooling system
fi
ller cap
Pressurized System: Hot coolant can cause seri-
ous burns. To open the cooling system
fi
ller cap,
stop the engine and wait until the cooling system
components are cool. Loosen the cooling system
pressure cap slowly in order to relieve the pres-
sure.
1.
Remove the cooling system
fi
ller cap slowly in
order to relieve pressure.
2.
Maintain the coolant level within 13 mm (0.5 inch)
of the bottom of the
fi
ller pipe. If the engine is
equipped with a sight glass, maintain the coolant
level to the proper level in the sight glass.
g00103639
Illustration 24
Typical
fi
ller cap gaskets
3.
Clean the cooling system
fi
ller cap and check the
condition of the
fi
ller cap gaskets. Replace the
cooling system
fi
ller cap if the
fi
ller cap gaskets are
damaged. Reinstall the cooling system
fi
ller cap.
4.
Inspect the cooling system for leaks.
i02573904
Cooling System Water
Temperature Regulator -
Replace
Replace the water temperature regulator before
the water temperature regulator fails. This is a
recommended preventive maintenance practice.
Replacing the water temperature regulator reduces
the chances for unscheduled downtime.
A water temperature regulator that fails in a
partially opened position can cause overheating or
overcooling of the engine.
A water temperature regulator that fails in the closed
position can cause excessive overheating. Excessive
overheating could result in cracking of the cylinder
head or piston seizure problems.
A water temperature regulator that fails in the open
position will cause the engine operating temperature
to be too low during partial load operation. Low
engine operating temperatures during partial loads
could cause an excessive carbon buildup inside the
cylinders. This excessive carbon buildup could result
in an accelerated wear of the piston rings and wear
of the cylinder liner.
Refer to Disassembly and Assembly, “Water
Temperature Regulator Housing - Remove and
Install” for the replacement procedure of the water
temperature regulator, or consult your Perkins
distributor.
Note:
If only the water temperature regulators are
replaced, drain the coolant from the cooling system to
a level that is below the water temperature regulator
housing.