Electrolyte Level Check - Hitachi ZW 370-6 Operator's Manual

Electrolyte Level Check

--- every 100 hours (Do this when machine is cold.)
1. Check the electrolyte solution level at least once a
month.
2. Park the machine on level ground and stop the engine.
3. Check the electrolyte solution level.
3.1 When checking the level from the battery side:
Clean around the level check lines with a wet towel.
Do not use a dry towel. Static electricity may spark,
causing the battery gas to explode. Check if the
electrolyte solution level is between U.L (Upper Level)
and L.L (Lower Level). In case the electrolyte solution
level is lower than the middle level between the
U.L and L.L, immediately refill with distilled water or
commercial battery fluid. Be sure to refill with distilled
water before recharging (operating the machine).
After refilling, securely tighten the filler caps.
3.2 When impossible to check the level from the battery
side or no level check mark is indicated on the side:
After removing the filler plug from the top of the
battery. Check the electrolyte solution level by
viewing through the filler port. Use a flash light and a
mirror to do this. It is difficult to accurately judge the
electrolyte solution level in this case. Therefore, when
the electrolyte solution level is flush with the U.L, the
level is correct. Referring to the illustrations to the
right, check the level.
When the electrolyte solution level is lower than the
bottom end of the sleeve, refill with distilled water
or commercial battery fluid up to the bottom of the
sleeve. Be sure to refill with distilled water before
recharging (operating the machine). After refilling,
securely tighten the filler caps.
3.3 When an indicator is available to check the level, use it.
4. Always keep the battery areas clean to prevent battery
discharge. Check terminals for looseness and/or
corrosion. Coat terminals with grease or petroleum jelly
to prevent corrosion build up.
MAINTENANCE
Separator Top
Correct
Lower
7-81
U.L (Upper Level)
L.L (Lower Level)
Filler Port
Sleeve
Upper Level
Lower Level
Since the electrolyte solution surface touches the bottom
end of the sleeve, the electrolyte solution surface is raised
due to surface tension so that the electrode ends are seen
curved.
When the electrolyte solution surface is lower than the
bottom end of the sleeve, the electrode ends are seen
straight.
M146-07-109
M146-07-110
M146-07-111
M146-07-112
M409-07-072