MAINTENANCE
GTTZ10EJ Maintenance Manual 5-41 © Mar. 2022
2. Ensure the hydraulic tank body and its connections
are free of leaks.
3. Add oil as needed. Never overfill the tank.
Table 5-16
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.
3. Replacing the hydraulic oil
HIGH PRESSURE HAZARD
Slowly release each component to
dissipate the pressure. Hot hydraulic
oil may penetrate the skin. Please
seek medical attention immediately if
hurt.
For the good performance of hydraulic system and safe
machine operation, the hydraulic oil should be replaced
every 1000h or 2 years. The maintenance freqeuncy
may be appropriately adjusted under the following
conditions：
• After major repair or severely defective
• Machine storage period exceeding 6 months
• Plastic or metal scraps are discovered in hydraulic
filter element
1. Open the right turntable cover.
2. Remove the drain plug of the hydraulic tank, drain
all the oil into a suitable container, and re-install the
plug. For the hydraulic tank capacity, see Machine
Specifications, page 2-1
Figure 5-48
3. Remove the retaining bolts and clamps from the
hydraulic tank, and remove the hydraulic tank.
4. Using a mild solvent, clean the inside of the tank
and let it dry up.
5. Install the hydraulic tank onto the machine.
6. Install the drain plug.
7. Open the filler cap, add new oil, do not overfill.
Battery
1. Preparation
UNSAFE OPERATION HAZARD
• Cordon off the test area before the
maintenance is performed.
• 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.
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