Manitowoc Grove GMK 5200-1, Maintenance Manual

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Maintenance work on the carrier
7.17 Electrical system
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GMK5200-1
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7.17.3
Checking the charge level of the batteries
Spare parts and
tools – Battery charger (additional equipment);
à
p. 7 - 128 or
– Acid siphon.
Charge level table The measurement of the acid concentration with the acid siphon will give
you an indication of the charge level of the batteries. The acid siphon can
have a scale in g/cm³, for example. Observe the special scale on your acid
siphon.
M 3
Acid concentration (g/cm³) Charge level
1.28 good
1.20 half-charged; recharge
1.12 flat; recharge immediately
G
Risk of poisoning from batteries containing lead.
Battery poles, terminals and parts inside the battery contain lead. Residue
containing lead can stick to your hands and may not be allowed to enter
your body – e.g. by touching food.
Wash your hands after working on batteries.
G
Risk of explosion from escaping hydrogen.
Do not place tools on the battery and keep naked lights away from it.
G
Risk of explosion from static charge.
Only use antistatic cloth to clean the batteries.
This prevents static charging which could result in hydrogen mixtures
exploding.
G
Risk of burns from battery acids.
Battery acid is highly caustic. Wear safety glasses and protective gloves. Do
not tilt the battery. Rinse off or wash out any acid spray on the skin or cloth-
ing using soap suds.
S
Risk of damage to the crane's electrical system.
Always switch off the battery master switches before commencing work on
the truck crane's electrical system.
This prevents short circuits and resulting damage to the electrical system.