Maintenance
Electrical System
126 9831/7750-1 126
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.
CAUTION Understand the electrical circuit before connecting or disconnecting an electrical component. A
wrong connection can cause injury and/or damage.
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 Positions (Page 87).
2. Get access to the batteries.
Refer to: Access Apertures (Page 90).
3. If the machine has a battery isolator, switch off the battery isolator and remove the key.
Refer to: Battery Isolator (Page 32).
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.
1. Isolate the machine electrics.
2. Make sure that the machine electrics are isolated.
A defective isolator must be repaired before the machine is used. For more information, contact your JCB
dealer.
Fuses
Replace
Secondary Fuses- Steering Column
Notice: Always replace fuses with ones of correct ampere rating to avoid electrical system damage.
The electrical circuits are protected by fuses. If a fuse blows, find out why before a new one is installed. Refer
to: Fuses (Page 142).
The secondary fuses are situated in the back side of steering column panel. Refer to Figure 75.
To get accesses to the secondary fuses:
1. Make the machine safe.
Refer to: Maintenance Positions (Page 87).
2. Remove the screws.
3. Remove the panel. Refer to Figure 75.
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