Komatsu PC88MR-10 Shop Manual page 515

Since the battery produces combustible gas
that can explode, do not bring any open
flame near it.
Battery electrolyte is dangerous. Take care
that it does not come in contact with your
eyes or skin. If it does, wash it away with
water and contact your doctor.
a Do not add the electrolyte to the battery
exceeding UPPER LEVEL line. If the electrolyte
level is too high, it may leak and cause damage
to the paint surface or corrode other parts.
a To avoid freezing, add the purified water (such
as a commercial battery fluid) before starting the
work in the next day.
When checking the electrolyte level through the
side face of the battery
1. Open the battery room door and roll up rubber
cover (1) installed above the battery.
2. Wipe and clean the battery surface, especially
around the battery level lines with a wet cloth,
and check to see that the battery fluid is
between the UPPER LEVEL (U.L.) and LOWER
LEVEL (L.L.) lines.
a Do not clean the battery with a dry cloth
since static electricity may cause an
explosion.
3. If the electrolyte level is below the center
between the UPPER LEVEL (U.L.) and LOWER
LEVEL (L.L.) lines, remove cap (2) and add
purified water (example: commercially available
PC88MR-10
Related information on troubleshooting
battery fluid) to the UPPER LEVEL (U.L.) line
immediately.
4. After adding the purified water, tighten cap (2)
securely.
a If the purified water is added to above
UPPER LEVEL (U.L.) line, remove the fluid
by using a syringe to lower the level to
UPPER LEVEL (U.L.) line. Neutralize the
removed fluid with baking soda (sodium
bicarbonate), then flush it away with a large
amount of water.
When electrolyte level cannot be checked
through the side face of the battery
1. Remove cap (2) on the top of battery. (described
previously)
2. Look into filler port (3) and check the surface of
fluid. If the fluid level is below sleeve (4), always
add the purified water (such as a commercial
battery fluid) until it reaches the bottom of sleeve
(the UPPER LEVEL).
(A) Correct level: Since the electrolyte level
reaches to the sleeve bottom, the shape of
the electrode plates will appear distorted due
to the surface tension.
(B) Low level: Electrolyte level does not
reach the bottom of sleeve, so pole plates
appear straight and not bent.
3. After adding fluid, tighten cap (2).
40 Troubleshooting
40-27