5 - 3
Air Bleeding from the Slew Motor
!!
WARNING
DO NOT remove the hydraulic tank filler cap or cover
plate when the engine is running. The hydraulic system
is under pressure. You or others could be injured. First
stop the engine and then release the pressure.
8-3-4-4/1
!!
WARNING
The temperature of the hydraulic oil will be high soon
after stopping the engine. Wait until it cools down (less
than 40°C) before beginning maintenance.
8-3-4-10
1. Prepare the Machine
a. Position the machine on level ground.
b. Idle the engine at low speed, loosen the air bleeding
plug A and check that oil comes out from the air
bleeding port.
DO NOT SLEW THE MACHINE.
c. If no oil comes out, stop the engine, remove the air
bleeding plug A and fill the motor case with hydraulic
oil.
d. Temporarily tighten the air bleeding plug.
e. Idle the engine at low speed and continue to run until
oil comes out from the air bleeding port.
f. Completely tighten the air bleeding plug.
g. Idle the engine at low speed and slowly slew the
machine left to right evenly more than 2 turns.
h. After bleeding is completed, stop the engine for 5
minutes or more and release the bubbles from the oil
in the hydraulic oil Tank.
Section 3
Routine Maintenance
9803/6400
Section 3
5 - 3
Issue 2*
Hydraulics (continued)
A
A
JS200/JS210/JS220 JS240/JS260
*
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