Material Terminal grease
Distilled water
Cleaning cloth
Protective gloves
Eye protection
Precondition The machine is switched off.
The machine is standing level.
The machine is fully vented, the pressure gauge reads 0 psig.
The machine has cooled down.
➤ Remove the left-rear panel.
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.
Checking 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 off with pure acid will increase the electrolyte concentration and can destroy the bat‐
tery.
➤ Top off only with distilled water.
2. Check the electrolyte level.
If the electrolyte level does not reach the mark -
➤ Top off with distilled water.
➤ Attach the panel.
Winter operation:
The battery is especially stressed during winter. Only a fraction of the normal starting energy is
available at low temperatures.
1.
Danger of batteries freezing!
Discharged batteries are subject to frost damage and can freeze at 14 °F.
➤ Check battery charge with a specific acid density tester.
➤ Recharge the battery.
➤ Clean the battery terminals and coat with terminal grease.
2. Check the battery charge weekly.
Recharge as necessary.
3. For machine standstill times of several weeks: Remove the battery and store in a frost-free
room.
In extreme cases, the use of a heavy-duty cold-start battery and/or an additional booster bat‐
tery is recommended.
10 Maintenance
10.4 Drive engine maintenance
128
Operator Manual Portable Rotary Screw Compressor
MOBILAIR M58utility SIGMA CONTROL SMART
No.: 901779 08 USE
