Battery Isolator - jcb JS300 Service Manual

4. Apply a thin layer of petroleum jelly to the terminal posts.
Connect
CAUTION The machine is negatively earthed. Always connect the negative pole of the battery to earth.
When connecting the battery, connect the earth (-) lead last.
When disconnecting the battery, disconnect the earth (-) lead first.
1. Get access to the batteries.
Refer to: Maintenance > Electrical System > Battery > Disconnect (Page 225).
2. Connect the battery leads. Connect the earth (-) terminal last.
3. If the machine has a battery isolator, move the switch to the on position.
Refer to: Operation > Battery Isolator (Page 128).
Disconnect
CAUTION The machine is negatively earthed. Always connect the negative pole of the battery to earth.
When connecting the battery, connect the earth (-) lead last.
When disconnecting the battery, disconnect the earth (-) lead first.
NOTICE Do not disconnect the battery while the engine is running, otherwise the electrical circuits may
be damaged.
1. Make the machine safe.
Refer to: Maintenance > Maintenance Positions (Page 184).
2. Get access to the batteries.
Refer to: Maintenance > Access Apertures (Page 191).
3. If the machine has a battery isolator, move the switch to the off position then remove the key.
Refer to: Operation > Battery Isolator (Page 128).
4. Disconnect the battery leads. Disconnect the earth (-) terminal first.

Battery Isolator

Check (Operation)
NOTICE Do not isolate the machine electrics when the engine is running, this may cause damage to the
machine electrics.
225
Figure 235.
9831/1100-2
Maintenance
Electrical System
225