1.3 Notes on repair
1.3.1 General repair instructions
NOTICE!
Ensure strict cleanliness when performing
repair work!
– No foreign objects should enter into open sys-
tems.
– Thoroughly clean the area around the affected
components.
– Dry off wet locations with compressed air.
Before removing or disassembling parts, assembly groups, compo-
nents or hoses mark these parts for easier assembly.
1.3.1.1 Repair notes for electrics
NOTICE!
Electrical components may get damaged by
welding work!
– Always remove the main battery switch.
– Disconnect the batteries and connect negative
and positive cables.
– Pull the plugs off the control units.
Always fasten the earth clamp of the welding unit in the immediate
vicinity of the welding location.
When choosing the location for the earth clamp make sure that the
welding current will not pass through joints or bearings.
Maintenance free batteries also need care. Mainte-
nance free only means that the fluid level does not
need to be checked.
Every battery has a self-discharge, which may, if
not checked occasionally, even cause damage to
the battery as a result of exhaustive discharge.
Exhausted batteries (batteries with formation of
sulphate on the plates) are not covered under war-
ranty!
n
When removing a battery always disconnect the minus pole
before the plus pole. When installing the battery connect the
minus pole after the plus pole to avoid short circuits.
n
Assemble the battery terminal clamps without force.
Electrics and welding
Battery
General – Notes on repair
BW 174 APO-4i / BW 174 AP-4i / BW 174 ACP-4i AM / BW 174 AP-4i AM
47
