PRE-OPERATION INSPECTION
GTZZ25J Operation Manual 5-3 © Nov. 2022
Perform the following procedures with the boom in
stowed position:
1. Open the left turntable cover to make visual
inspection of the sides of hydraulic tank, the
hydraulic oil level should be within the marking
range of oil level indicator.
Figure 5-1
2. Ensure the hydraulic tank body and its connections
are free of leaks.
3. Add oil as needed. Never overfill the tank.
Table 5-1
CUSTOMER
REQUIREMENTS
HYDRAULIC OIL
MARK
Normal-temperature region
0°C to 40°C (32°F to 104°F)
L-HM46
Cold region
-25°C to 25°C (-13°F to 77°
F)
L-HV32
High-temperature region
greater than 40°C (104°F)
L-HM68
Extremely cold region
less than -30°C (-22°F)
Special programmes
need to be identified.
NOTICE
Different hydraulic oils can be added according to
customer requirements upon factory delivery, but
cannot be mixed.
INSPECTING FUEL LEVEL
NOTICE
Be sure to shut down the engine before inspection.
Keeping the diesel fuel at an appropriate level is vital to
maintaining the engine performance and extending
service life. An inappropriate fuel level will bring
damage to the engine parts and lead to improper
functioning of the machine.
Perform the following procedures with the boom in
stowed position:
1. Turn the Ground/Platform control select switch at
the ground controller to the ground control position,
and pull out the emergency stop button at the
ground controller to the ON position, and then turn
on the key switch at the ground controller, the
ground control display will show the diesel fuel
percentage.
Figure 5-2
2. OR turn the Ground/Platform control select switch
at the ground controller to the platform control
position, and pull out the emergency stop buttons at
both the ground and platform controller to the ON
position, and then turn on the key switch at the
ground controller, the platform control display will
show the diesel fuel level.
Figure 5-3
3. When the fuel level is less than or equal to 10%, the
alarm will sound, make sure to add fuel to continue
work.