© Jan 2022 5-12 0607SE Maintenance Manual
MAINTENANCE
BODILY INJURY HAZARD
Lead-acid batteries and lead-acid
maintenance-free batteries contain
acid. Avoid acid overflow or contact
with acid in lead-acid batteries and
lead-acid maintenance-free batteries.
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 or
even fires.
2. Ensure the battery negative and positive are
correctly connected.
3. Ensure the battery connections are not corroded.
Note: Adding a terminal protector and anti-
corrosion agent will prevent the terminals 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. Fill up the liquid gravity meter and drain it for two or
three times, then take a sample from the battery
electrolyte.
7. Measure the 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 gravity reading for every
5℃ (40°F) higher; if the ambient temperature is
below 27℃ (80°F), reduce 0.004 to calibrate the
gravity reading for every 5℃ (40°F) lower;
• Result 1: if the gravity readings of all battery
cells are 1.250 or higher, and the difference of
the gravity readings is less than 0.050, proceed
with the next step.
• Result 2: if the gravity readings of all battery
cells are below 1.250, it indicates the battery is
running low and needs charging. After charging,
measure the gravity reading, if it meets the
Result 1, proceed with the next step.
• Result 3: if the difference of the gravity readings
is greater than 0.050, equalize the battery pack
and hold it still for 6 hours before re-
measurement of the gravity readings, if
satisfying the Result 1, proceed with the next
step.
Note: if the Result 1 cannot be met even after many
attempts, the battery may have malfunctions.
9. Check the battery electrolyte level, add distilled
water to the required level if needed.
10. Install the ventilation cover to the battery.
B-4 Inspect Hydraulic Oil
Inspecting and replacing the hydraulic oil is important
for the proper operation of the machine and the
extension of service life. The machine may be unable to
operate properly if the hydraulic oil becomes dirty, and
the hydraulic parts may be damaged if using
contaminated oil. Replace the hydraulic oil often,
especially when the service environment is very dirty.
NOTE: Due to wear and tear on the mesh components,
metal particles may appear in the hydraulic fluid or filter
of the new machine.
BURN HAZARD
Before maintaining the hydraulic
system, allow the hydraulic fluid to
cool to room temperature.
Replace the hydraulic oil if any of the following
conditions exist.
• The hydraulic oil is milky white and cloudy.
• The hydraulic oil is blackened.
• Obtain a sample of the hydraulic oil and inspect it in
sunlight. Rub the oil between two fingers to
determine if it contains metal particles.
• The hydraulic oil has an abnormal smell.
See D-3 Replace Hydraulic Oil, page 5-19 for
replacement steps.
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