MAINTENANCE EVERY 50 OPERATING HOURS 27.4 CHECKING THE BATTERY AND ACID LEVEL Danger of injury! The battery contains highly toxic battery acid which may squirt out and burn your eyes! Use goggles and rubber gloves if you work on the battery. Immediately rinse your eyes or skin using plenty of water and immediately seek medical attention. Gases which may explode can form inside in the battery! Do not come with open fire or sparks into proximity of the battery. Do not smoke. 1 - For maintenance operations, park and secure the machine as described in chapter "22.1 Preparing the Ma- chine for Maintenance". 2 - Check the battery and pole terminals for proper fit.
3 - Clean the environment of the plugs. 4 - Remove all plugs and check whether the battery acid is at the acid level markings. Refill distilled water if the acid level is too low. In cold weather, refill distilled water only immediately before starting the machine. The water can then mix with the battery acid and does not freeze. 5 - Measure the specific density of the battery acid and read off the battery charging using the following conver- sion table. 6 - Recharge insufficiently charged batteries.
7 - Lock the cells with the cleaned plugs.Re-Charging the Battery 158 BATTERY TEMPERATURE 20°C / 68°F 5°C / 41°F -10°C / 14°F -25°C / -13°F Charge Specific density (kg/l) full half empty empty 1.28 1.20 1.12 1.29 1.21 1.13 1.30 1.22 1.14 1.31 1.23 1.15