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CAUTION
Danger of battery freezing!
Discharged batteries are subject to frost damage and can freeze at –10 ℃.
➤ Check battery charge with a acid density tester.
➤ Recharge the battery.
➤ Clean the cable connections and apply terminal grease.
1. Check the battery charge weekly.
Recharge as necessary.
2. For machine standstill times of several weeks: Remove the batteries and store in a frost-free
room.
In extreme cases, the use of heavy-duty cold-start batteries and/or additional batteries is rec‐
ommended.
10.4.9.3 Battery removal and installation
Precondition The machine is shut down.
The machine is standing level.
The machine is fully vented, the pressure gauge reads 0 bar.
Machine is cooled down.
The «battery isolating switch» is off.
WARNING
Risk of battery bursting!
If a battery is short circuited it will overheat and can burst.
Battery electrolyte will be sprayed out in such an event.
➤ Never short-circuit a battery (e.g. with a hand tool).
➤ Wear gloves and eye protection.
CAUTION
Excessive voltage produced by the alternator.
Voltage peaks can destroy the alternator regulator and diodes.
➤ The battery serves as a buffer and must not be disconnected while the engine is running.
1. Open the left-hand door.
2. Disconnect the negative cable first, then the positive cable.
3. Unscrew the battery fixing clamp.
4. Replace in the reverse order.
5. Activate the «battery isolating switch».
6. Close the door.
Replacing batteries
Replacement batteries must have the same capacity, current strength and form as the original bat‐
teries.
➤ Always replace a battery with one of the same type.
Old batteries are special waste and must be disposed of correctly in accordance with local
environment protection regulations.
10 Maintenance
10.4 Engine
124
Service Manual Screw Compressor
M170 SIGMA CONTROL MOBIL
No.: 9_9425 01 E