Hitachi ZX27U-2 Operator's Manual page 169

Check Electrolyte Specific Gravity
The specific gravity for electrolyte varies depending on
electrolyte temperature. The specific gravity should be
kept within the range shown below. Charge the battery if
the specific gravity is below the limit.
40℃
20℃
0℃
-20℃
-40℃
1.21
NOTE: Check the specific gravity of electrolyte after it is
cooled to air temperature. As electrolyte tem-
perature changes immediately after operation,
correct measurement can be difficult.
Precautions for Handling Batteries
•
If electrolyte spills on your skin or clothes, immediately
flush the spilled skin or clothes with water. Then, suffi-
ciently wash them with soapy water. If electrolyte
splashes in eyes, flush your eyes with water for 10 to
15 minutes. Get medical attention immediately.
•
Don't use fire hazards such as matches or tobacco, or
don't allow sparks to fly near the batteries.
•
Perform battery maintenance only after turning the key
switch OFF and removing the battery caps.
•
Touching the batteries soon after operation is haz-
ardous. Wait for the batteries to cool.
•
During charging, batteries generate flammable hy-
drogen gas. Remove the batteries from the base ma-
chine. Then, charge the batteries in a well-ventilated
area only after removing the caps.
•
When disconnecting the battery terminals, be sure to
disconnect the negative (ground) terminal first, and
when reconnecting the battery terminals, reconnect
the negative (ground) terminal last. If a conductor such
as a metal tool is placed between the battery positive
terminal and the vehicle frame with the battery nega-
tive terminal kept connected to the vehicle frame,
electric short circuit may occur, possibly creating a
hazardous situation.
•
Loosely tightened terminals may cause sparks to fly.
Securely tighten the terminals.
MAINTENANCE
Working Range of Electrolyte Specific Gravity
1.22 1.23 1.24 1.25
Specific gravity of battery fluid
Working Range
1.26 1.27 1.28 1.29
7-49
1.30 1.31 1.32 1.33
M104-07-054
SA-032
SA-036