Operation Manual
42
Chapter IV Structures of Main Components
I.
Diesel engine
For detail descriptions, see
Operation and Maintenance Manual
for the diesel engine provided for this
model.
Notes:
1.
When the loader shall travel for long distance or stops with antifreeze fluid not filled in the coolant
during cold weather (the ambient temperature is below the freezing point), switch on the water draining
switches for diesel engine body, water pump, oil cooler, water tank lower chamber and torque
converter oil cooler to drain out the water to avoid frost crack.
2.
If the coolant contains oil or the diesel engine oil pan oil contains water, check the oil cooler core
of torque converter for crack while checking diesel engine.
II. Hydraulic torque converter
Here is equipped with a single-stage
three
-element hydraulic converter between its engine and
transmission mechanism (transmission).
(i) Features
1.
The hydraulic torque converter can automatically adjust the output torque and rotation speed so
that the loader can automatically change the traveling speed and traction force according to the road
condition and resistance, adapting to changing working conditions. After gear engagement, the
machine can start stably and accelerate to the maximum speed with good performance and automatic
stepless speed change. In case of a steep slope or a sudden obstacle, it will decelerate automatically
without gear shifting to increase traction force and can travel at any low speed. After the obstacle is
passed and the external resistance is reduced, it can automatically accelerate quickly to increase
working efficiency. For material shoveling, it can stretch the bucket into the material at a high speed
and then, with the resistance increase, automatically decelerate to increase the wheel traction force to
ensure deep shoveling. The above-mentioned advantages provide a high average traveling speed and
a short cycle time, improving the productivity.
2.
The hydraulic torque converter has
one
turbine which can realize automatic shift between low
speed with heavy load and high speed with light load, significantly reducing the transmission gears,
simplifying structure and reducing manufacturing cost.
3.
The high torque conversion ratio and wide high efficiency range make the loader bring the traction
force and speed into full play by utilizing the engine power, providing good economy performance.
4.
The hydraulic torque converter with oil as the medium supersedes the mechanically connected
main clutch and the working oil absorbs and eliminates the vibration and shock from the engine and
external loads, protecting the diesel engine and power train system, prolonging the loader’s service life
and reducing maintenance and cost. Even if the external load increases suddenly or cannot be
overcome, the engine will not stop, ensuring pump operation and improving the loader safety and
reliability.
5.
The elimination of vibration and shock, removal of main clutch, stepless speed change and
