C4 Maintenance 12. Replacing the Battery Unit
150 C Series Maintenance Manual Rev.2
12.1 Replacing the Battery Unit (Lithium Battery)
When tightening hexagon socket head cap bolts, refer to the 2.4 Tightening Hexagon Socket
Head Cap Bolts.
1. Turn OFF the Controller power.
2. Remove the Arm #1 upper cover.
For details, refer to C4 Maintenance: 3. Covers.
3. Loosen the screws fixing the L-
shaped plate on the Arm #1 and
remove the plate.
Hexagon socket head cap bolts: 2-M4×8
Be careful not to disconnect the battery connector.
If you removed all the batteries before connecting the new ones, the calibration data will be deleted and
you will need to perform calibration. Follow the steps below to remove the lithium batteries.
4. Cut off the wire tie of the plate.
5. Disconnect the connector of one of two batteries. Then, connect
the connector of the new battery.
6. Disconnect the connector of the other battery. Then, connect the
connector of the new battery.
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