PRE-OPERATION INSPECTION
GTZZ15J Operation Manual 5-5 © Nov. 2022
8. Add engine oil as needed. Do not overfill the tank. It
is recommended to use engine oil equivalent to or
higher than CH-4 with viscosity grade of 15W-40.
Table 5-3
VISCOSITY RECOMMENDED AMBIENT TEMP
0W-30 -35℃～0℃
5W-40 -25℃～30℃
15W-40 -15℃～40℃
20W-50 0℃～50℃
NOTICE
• The engine oil filled by the factory is generally
CH-4 with viscosity of 15W-40, suitable for
regions with ambient temperature range of -15℃
～40℃. If the operating ambient temperature is
outside of the range, please change the engine oil
as appropriate.
• The multi-grade engine oil can provide excellent
lubrication under high-temperature operating
condition, reduce the sediments, and improve the
engine low-temperature start performance and
durability. Also, the multi-grade engine oil plays
an important role in ensuring the machine
meeting the emission standards.
• Do not mix the engine oils of different grades.
• It is recommended that the sulphated ash content
not exceed 1%, otherwise it will damage the air
valve or piston, and lead to excessive
consumption of engine oil.
• The use of high-quality engine oil in conjunction
with suitable oil filter and replacement interval of
oil filter is very critical to maintaining engine
performance and extending service life. If the oil
or oil filter is not replaced as recommended, there
will be sediments, contaminants or wear incurred
which will shorten the engine service life.
INSPECTING COOLANT
LEVEL
An appropriate coolant level is vital to maintaining the
engine performance and extending its service life,
otherwise it will damage the engine parts. Through the
daily check, the inspector can know about the changes
in coolant level which may indicate a system distress
with the engine.
HIGH TEMPERATURE AND
PRESSURE HAZARDS
Before inspecting the coolant level,
allow the coolant to cool down to room
temperature, and slowly open the cover
to release the pressure.
NOTICE
Turn off the engine before inspection.
1. Turn off the engine, and open the right turntable
cover.
2. Open the cover of coolant box over the radiator to
inspect the coolant level.
Figure 5-4
3. The coolant level should be at the fill inlet of the
coolant box.
4. Add coolant as needed. Do not overfill the tank. It is
recommended to choose the -18℃ ready-mix
coolant or the ethylene glycol (ethylene and
propene) coolant proportionally mixing with water.
The water quality must meet the requirements as
listed in the table below.
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