Komatsu Galeo BR380JG-1E0 Shop Manual page 284

SEN02303-00
2. Combination of pump, actuator, and valve
a When the oil from the pumps is divided,
the front pump and rear pump act inde-
pendently on each actuator as shown in
the table below. Note that different actua-
tors relieve different valves.
Pump Actuator
Crusher
Right travel
Front
Lock cylinder reset
(Unload)
(Unload)
Magnetic separator
Side conveyor
Primary conveyor
elevator
Side conveyor
Rear
elevator
Lock cylinder extension
and retraction
Primary conveyor
Left travel
Feeder
3. Measuring unload pressure
1) Start the engine.
2) Run the engine at high idle, turn OFF the
work equipment switch, set the travel con-
trol lever to neutral, and measure the oil
pressure.
a The pressure measured when the
unload valve is unloaded is indicated.
4. Measuring main relief pressure
1) Run the engine at high idle.
2) Relieve each actuator and measure the oil
pressure.
a The set pressures of the safety valves
of the actuators other than the travel
motor are lower than the set pressure
of the main relief valve. Accordingly,
the relief pressure of each safety
valve is measured.
a As the relief pressure of the crusher
motor, measure the oil pressure when
the crusher motor is started.
a When measuring the relief pressure
of each motor drive circuit of the griz-
zly feeder, primary conveyor, side
conveyor, and magnetic separator,
block the piping of the motor inlet cir-
cuit or the valve outlet circuit.
26
Valve relieved
Crusher motor safety
valve
F main relief valve
Safety valve
F unload valve
R unload valve
Safety valve
Safety valve
Safety valve
Safety valve
Safety valve
Safety valve
R main relief valve
Safety valve
5. Measuring travel relief pressure
1) Run the engine and lock the travel mecha-
nism.
k
Put pin [2] between the sprocket
and track frame to lock the travel
mechanism securely.
2) Set the conveyor height to Hi (Travel oper-
ation position), set the machine in the
travel mode, and select travel speed Hi.
3) Run the engine at high idle, operate the
travel lever to relieve the travel motor, and
measure the oil pressure.
k
Before operating the travel lever,
check the position and locking
direction of the locked sprocket
again.
a The pressure measured when the main
relief valve of the control valve is
relieved is indicated. The travel circuit is
always relieved at high pressure.
30 Testing and adjusting
BR380JG-1E0