© Feb. 2023 82 TB20J Plus Maintenance Manual
POWER SYSTEM
4. Repeat the above steps at least 4 times until the fuel
lines are fully vented.
Lubrication System
Check the Engine Oil Level
1. Turn off the engine.
2. Make sure that the machine and engine are
horizontal.
3. Remove the oil dipstick from the engine and wipe
the dipstick with non-fiber cleaning cloths.
4. Put the clean dipstick back to its original position.
5. Remove the dipstick again and check the oil level,
which should be between the FULL (HOT) mark and
LOW (COLD) mark on the dipstick.
6. If necessary, fill with correct engine oil to the FULL
(HOT) mark on the dipstick according to the Oil Re-
quirements , and do not overfill the tank.
Change the Engine Oil
It is recommended to change the engine oil every 6
months or after 500 hours of operation.
NOTICE
• Every time the engine oil is changed, the engine
oil filter must also be replaced.
• Changing the oil with the engine warmed up can
make the engine oil flow smoother and remove
more impurities.
1. Before changing the oil, run the engine until the
coolant reaches approximately 60°C (140°F), and
then turn off the engine.
2. Make sure that the machine and engine are
horizontal.
3. Place an appropriate oil-collecting vessel under the
engine oil drain valve.
4. Remove the drain plug to drain the oil. Make sure to
remove all oil and suspended dirt from the engine.
Hot engine oil poses a risk of burns, so avoid
contact with hot oil when draining oil.
5. Clean and inspect the threads and sealing surfaces
of the drain plug. If damaged, replace the O-ring
with a new one.
Fig 37
6. Reinstall the drain plug after the oil is fully drained.
7. Fill with correct and clean engine oil according to
the Oil Requirements , and never overfill the tank.
8. Idle the engine and check the drain plug for
leakage.
9. Turn off the engine. Wait about 5 minutes for the oil
to flow back from the upper parts of the engine.
10. Check the oil level, which should be in the proper
position.
Replace the Engine Oil Filter Element
It is recommended to replace the engine oil filter ele-
ment every 6 months or after 500 hours of operation.
1. Place an appropriate oil-collecting vessel under the
engine oil filter.
2. Disassemble the oil filter with special tools.
3. Collect the drained fuel.
4. Wipe the sealing surface of the filter holder with
clean, non-fiber cloths.
5. Apply a thin layer of oil to the sealing surface of the
new filter.
6. Fill the filter with clean oil.
7. Mount the filter on the oil filter bracket.
8. Screw on the filter by hand until the gasket is touch-
ing, then tighten it.
9. Idle the engine and check the oil filter gasket for
leakage.
Cooling System
It is recommended to replace the coolant every year or
after 1000 hours of operation.
Check the Coolant Level
1. Turn off the engine.
2. Make sure that the machine and engine are
horizontal.
3. Check the coolant level, which should be between
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