Sinoboom ML10EJ - Page 80

© Mar. 2022 5-36 GTTZ10EJ Maintenance Manual
MAINTENANCE
UNSAFE OPERATION HAZARD
• Cordon off the test area before the
maintenance is performed.
• Be sure to wear goggles,
protective clothing and gloves.
• The machine must be positioned
on a level, firm surface clear of
obstructions.
• The disassembly, if needed, must
be performed by qualified trained
personnel with power supply
completely off.
2. Inspecting hand pump function
Mast up/down
Figure 5-42
1. Open the right turntable cover, and locate the
handle of hand pump.
2. Insert the handle into the hole of hand pump as
indicated.
3. While pressing the button at the end of main boom
lift valve, push and pull the handle up and down, the
main boom should rise.
Turntable rotate
Figure 5-43
1. Open the right turntable cover, and locate the
handle of hand pump.
2. Insert the handle into the hole of hand pump as
indicated.
3. While pressing the button at the end of turntable
rotate valve, push and pull the handle up and down,
the turntable should rotate clockwise.
4. Pull out the ring at the end of the turntable rotate
valve, and push and pull the handle up and down,
the turntable should rotate counterclockwise.
Steer
Figure 5-44
1. Open the right turntable cover, and locate the
handle of hand pump.
2. Insert the handle into the hole of hand pump as
indicated.
3. While pressing the ring of the button at the end of
steer valve, push and pull the handle up and down,
the machine should steer right.
A
A
A
A
B
B
A
A
B
B