Komatsu PC22MR-3 Operation & Maintenance Manual page 237

Hydraulic excavator
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MAINTENANCE
Whenever possible, use an indicator to check electrolyte level
If an indicator can be used to check electrolyte level, proceed as indicated below.
Battery with charge indicator
q A visual gauge indicates the battery charge level in different colours, according to the table positioned beside
the gauge:
q Green: optimal charge
q Gray: the battery needs recharging
q White: the battery must be replaced.
WEAM014500
MAINTENANCE PROCEDURES
4-29

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