Instruction Manual

52
Caterpillar: Non-Confidential
Engine
Engine Coolant
The proper maintenance of engine cooling
system is very important. Overheating,
overcooling, pitting, cavitations, cylinder
head cracks, stuck piston and plugged
radiator, are common problems of the
cooling system, these problems will not
only reduce the work efficiency of the
engine, but also can cause the engine
damage.
Antifreeze Fluid
The main function of antifreeze fluid is to
decrease the condensation and increase
the boiling point of the coolant. The
antifreeze fluid is also needed when
operating the machine under the normal
temperature, because it can increase the
boiling point of the coolant, the additive
included in the antifreeze fluid can also
reduce the framework corrosion and
cracks.
The antifreeze fluid Caterpillar (Qingzhou)
Ltd. recommends are listed as follows:
When replacing antifreeze fluid, use
premium antifreeze liquid and fill according
to its use guide. Attention: Antifreeze fluid
is highly flammable, do not use near an
open flame.
Checking the Coolant Level
The water radiator is located on the rear of
the machine.
 Wait until the temperature of the
engine coolant drops to below 50°C, then
remove the water radiator filler cap slowly
in order to relieve pressure. Any contact
with hot coolant or with steam can cause
severe burns.
 Check the coolant level. The coolant
should be located between the high-level
mark and low-level mark of the radiator
tank. Fill coolant to the high level mark if
the coolant is below the low level mark.
 Check the sealing of the water radiator
filler cap; change the filler cap if it is
damaged.
 Fasten the radiator filler cap.
 If filling coolant is needed every day,
please check engine-cooling system for
leaks. If there is a leakage, follow through
with the necessary repair, then fill
antifreeze fluid to corresponding level.
Fill the Coolant
Prior to filling the coolant of a new engine,
or an engine with a clean cooling system,
choose the anti-freeze fluid density of the
coolant basing on the lowest local
temperature (10°C below the lowest local
temperature is even better), calculate the
anti-freeze fluid quantity by volume of the
total engine cooling system, the total
cooling system volume of this machine is
30 liters.
Attention: Make sure not to use water as
a coolant, this will caused corrosion
damage. If water is used as coolant, the
warranty to the cooling system is void.
Attention: Do not fill coolant then the
engine is at a high temperature, this could
cause engine body damage. Wait until the
engine temperature is below 50C, and
then continue.
Fill the Coolant as Follows:
1. Turn on the power negative switch;
Lowest ambient
Temperature （C）
Changcheng
Antifreeze Fluid
Model
－50
YF-3
－45
YF-2A
－40
YF-2B
－35
YF-2
－25
YF-1