Further instructions on working with batteries:
➤ Do not remove battery terminal covers unnecessarily.
➤ Do not lay tools on the battery. This can lead to short circuiting, overheating and battery burst‐
ing.
➤ Take particular care when the battery has been in service for a long time or has just been
charged as highly explosive gas is emitted!
Ensure adequate ventilation!
10.4.8.2 Battery checking and care
Even so-called 'maintenance-free' batteries need a degree of care to obtain their maximum opera‐
tional life.
The outside of the battery and the terminals should be cleaned regularly with a soft cloth.
This avoids current leaks and minimises the discharge rate.
Material Terminal grease
Distilled water
Cleaning cloth
Protective gloves
Eye protection
Precondition The machine is shut down.
The machine is standing level.
The machine is fully vented, the pressure gauge reads 0 psig.
The machine is cooled down.
➤ Open both left-hand doors.
1. Clean the casing and terminals. Do not use a wire brush!
2. Lightly grease the terminals to prevent corrosion.
3. Check that the batteries and cable connections are properly seated and tighten if necessary.
Check the battery electrolyte level.
The fluid is generally sufficient for the life of the battery. Nevertheless, the fluid level should be
checked annually. The level should be up to the mark, 0.4 inches above the plates.
Replace the battery immediately if the casing leaks.
1.
Battery destruction!
Topping up with pure acid will increase the electrolyte concentration and can destroy the bat‐
tery.
➤ Top up only with distilled water.
2. Check the electrolyte level.
If the level does not reach the mark -
➤ Top up with distilled water.
➤ Close the doors.
10 Maintenance
10.4 Engine maintenance
134
Operator Manual Screw Compressor
M250 SIGMA CONTROL MOBIL
No.: 9_9570 07 USE