MAINTENANCE PROCEDURES
TB18 Plus&20J Plus Maintenance Manual 5-9 © Apr 2022
1. Turn the ground/platform select switch to ground
control.
2. Pull out the emergency stop button at ground
controls to ON position.
3. Turn the key switch at ground controls to ON
position.
4. Move the engine start switch and idle for 2 minutes.
5. Switch off the engine, and 5 minutes later open the
turntable cover on the right side.
6. Remove the engine dipstick to inpsect the engine
oil level.
7. The engine oil level should be between the FULL
and ADD marks.
8. Add engine oil as needed. Do not overfill. It is
recommended to use engine oil equivalent to or
higher than CH-4 with viscosity grade of 15W-40.
Table 5-6
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 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 muti-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 fullfilling the machine with 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 change interval is very
critical to maintaining engine performance and
extending service life. If the oil or oil filter is not
changed as recommended, there will be
sediments, contaminants or wear incurred which
will shorten the engine service life.
A-9 Inspect Coolant Level（water-
cooled engine）
The 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
on 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.
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