© Apr 2022 5-28 TB18 Plus&20J Plus Maintenance Manual
MAINTENANCE PROCEDURES
B-19 Inspect Battery
The condition of battery could affect the performance of
machine. Improper level of battery electrolyte or
damaged cable and wiring may damage battery parts
and pose dangerous conditions.
ELECTROCUTION HAZARD
• Contact with live circuit may
cause serious injury or death. Be
sure to wear goggles, gloves and
protective clothing.
• Remove all rings, watches and
other jewelry.
CHEMICAL BURN HAZARD
• Avoid the battery acid escaping
out and contact with skin, if does,
wash the skin with plenty of clear
water and seek medical
assistance.
• If battery acid spills, use water
mixed with bicarbonate (baking
soda) to neutralize the acid.
Note: Before performing this procedure, fully charge
the battery, and hold it still for 24 hours to equalize the
battery cells.
1. Ensure the battery cells are wired reliably with the
locking nuts torqued to the specifications as below:
Nut type Torque
M8 9～11Nm (6.6～8.1ft-lb)
M10 18～23Nm (13.2～17ft-lb)
NOTICE
Improper connection may cause reduced
performance, damaged terminals, fusions and
even fires.
2. Ensure the battery negative and positive are
correctly connected.
3. Ensure the battery cable connections are not
corroded.
Note: Adding a terminal protector and anti-
corrosion sealant will prevent the terminals and
cables from corrosion.
The instructions below are applied only for batteries
requiring maintenance：
4. Wear goggles, gloves and protective clothing.
5. Remove the ventilation cover.
6. Top up the liquid gravity meter and drain it for two or
three times, then take a sample from the battery
electrolyte.
7. Measure the specific gravity of all battery cells in
sequence and note down the readings.
8. If the ambient temperature is above 27℃ (80°F),
add 0.004 to calibrate the specific gravity reading
for every 5℃ (40°F) higher; if the ambient
temperature is below 27℃ (80°F), subtract 0.004 to
calibrate the specific gravity reading for every 5℃
(40°F) lower.
• Result 1: if the specific gravity reading of each
battery cell is 1.250 or higher, and the difference
in the specific gravity readings is less than
0.050, proceed with the next step.
• Result 2: if the specific gravity reading of one or
more battery cells is below 1.250, it indicates the
battery is running low and needs charging. After
charging, measure the specific gravity, and if the
Result 1 is obtained, proceed with the next step.
• Result 3: if the difference in the specific gravity
readings of any battery cells is greater than
0.050, equalize the battery pack and hold it still
for 6 hours before re-measurement of the
specific gravity. If the Result 1 is obtained,
proceed with the next step.
Note: if the Result 1 cannot be obtained even after
many attempts, the battery may have malfunctions.
9. Check the battery electrolyte level, and add distilled
water to the required level if needed.
10. Install the ventilation cover to the battery.
B-20 Test Oscillate Outriggers
TIPPING HAZARD
To perform this test, the machine
must be in stowed position.
1. Inspect the tie rod of multi-way valve is properly
secured before machine startup.
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