9
driving and sliding slope, the corresponding gear shall be controlled and the engine
speed shall not be lower than 1200r/min to meet the needs of lubrication of each part
of the transmession.
The operating pump for suplying oil to torque converter and operating is
mounted inside transmession and aslo controlled by pump wheel. Its flow is
35L/1000r/min,control pressure is 1.6~1.8Mpa (Liuzhou Transmession). Because of
the cushion construction inside the controlling valve, so the pressure of lowering and
rising should have a regularity. During gear change, in this way the geat change can
be smooth and less shock.. Besides, because of “Neutral insurrance” set in
transmession electric circuit, the driver can start the engine when the transmession is
in neytral, so this can prevent from mis-controlling.
The diesel lubrication oil L-ECD15W-40 is applied in this transmession. Filling
oil of the first time is about 28L. When checking oil level, the engine should be in idle
spped and transmession temperature is in normal working condition. At this time, two
oil scales indicate the levels 80
℃
(Upper scale) and 40
℃
(Lower scale). The oil level
will be higher than upper scale if check the engine without starting the engine.
Note: The transmission oil must be changed after operation of the
first 100 hours and later every 1000 hours or at least once a year. The
oil filter also should be changed with oil changing. Please notice that
the used filter could not be assembled again even no apparent
damage found.
Note: When the engine is shut down and the main machine is dragged,
this transmission require that the traction distance and speed of
grader cannot exceed 10km and 10km/h respectively.
Note: When conducting electric welding work on the main frame, the
gear selector circuit must be disconnected to avoid damaging its
internal circuit by unexpected over-current.
6.1.3 Traveling braking (Foot braking) hydraulic system (As shown in Fig. 9)
The foot brake has a one-circuit system with hydraulic pump and accumulator and
operates on four rear wheels of the grader.
When the engine is running, the double pump (2) of the working hydraulic draws
oil from the tank (4).
The oil from the pump is transmitted via the pressure limiting valve (9) into two
accumulators (11) to increase the pressure below 133 bars and to cut off oil when 150
bars.
Filling oil of the accumulator (11) requires only short time and then oil intaking
system makes oil flow into hydraulic circuit (130 bars).
The filling oil of the accumulator (11) has priority and therefore, the pressure oil
necessary for the braking system is available as soon as the engine is running.
Summary of Contents for PY180H
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