Maintenance
Electrical System
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Refer to: Maintenance Positions (Page 122).
2. Get access to the batteries.
Refer to: Access Apertures (Page 125).
3. If the machine has a battery isolator, move the switch to the off position then remove the key.
Refer to: Battery Isolator (Page 34).
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
The electrical circuits are protected by fuses. If a fuse blows, find out why before a new one is installed.
Notice: Always replace fuses with ones of correct ampere rating to avoid electrical system damage.
Refer to: Fuses (Page 182).
1. Make the machine safe.
Refer to: Maintenance Position (Excavator Arm Lowered) (Page 122).
2. The primary and secondary fuses are located in the engine compartment underneath the right side engine
compartment cover hinge.
2.1. Open the engine compartment cover.
2.2. Remove the cover to get access to the secondary fuses.
2.3. Install the cover.
2.4. Close the engine compartment cover
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