1 Start the engine and let it run at low idle for 5
minutes.
2 Then increase engine speed to approx. 1,200
rpm.
3 Carefully follow the instructions given below.
If the green bar for hydraulic oil temperature
covers more than one gradation, perform the
next steps 4 and 5.
If the green bar for hydraulic oil temperature
covers less than one gradation, raise the boom
slightly from the ground and operate bucket-in
and bucket-out using the control lever for 5
minutes (stop operation for 2-3 seconds after 1
operation, i.e. bucket-in or out).
After 5 minutes, if the green bar for hydraulic oil
temperature has not reached one gradation,
operate bucket-in using the control lever and
hold the control lever in that position for 10
seconds to reach relief pressure. Release the
control lever for 5 seconds and then repeat the
operation until the green bar has reached one
gradation.
4 Run out the bucket cylinder using the control
lever and let the bucket move to its end-position.
5 Then carry out a number of boom, dipper arm,
swing, and travel movements with the machine
to distribute the warmed hydraulic oil to all
hydraulic cylinders and motors.
Carry out these movements until the hydraulic
system has reached working temperature/rapid
working movements.
Travelling a short distance
Moving the machine a short distance (for example,
when loading onto or off a trailer) may be done
without a complete warm-up. This operation must
be done with great care. Under these conditions the
engine speed must not exceed 1,200 rpm and the
travel speed control should be in low speed
position.
V1140828
Hydraulics
Oil temperature
Hi
Hydraulic oil temperature screen
182
Operating instructions
Hydraulic system, warming up
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