- devices for stripping battery terminals and wire terminals;
- voltmeter;
- Charger.
When servicing the battery, it is necessary to follow the safety regulations (see «Safety measures for car maintenance and repair»).
Regular battery maintenance
1. We prepare the car for work (see «Preparing the car for maintenance and repair»),
2. Wipe the top of the battery case with a cloth moistened with a 10% solution of baking soda or ammonia, and then with clean water.
3. We check the reliability of fastening the battery to the car, if necessary, tighten the bolt of the pressure plate (see «Battery - removal and installation»).
4. Check the condition of the battery terminals. If they are covered with a layer of oxides, remove the terminals from the battery terminals. We clean the terminals of the battery with a special device.
5. Check the condition of the power wire terminals. If they are covered with a layer of oxides, remove the terminals from the battery terminals, clean the internal surfaces of the terminals to a shine, apply conductive grease and install the terminals in place.
Checking and charging
1. For an approximate assessment of the degree of contamination of the battery, we measure the voltage at its terminals and compare it with that given in table 14.4 (voltage values are given at a battery temperature of 20-24°C. If the degree of contamination of the battery is less than 50%, it must be charged).
Table 14.4
2. To check the battery under load, remove the fuse Ef6 (see «Fuse and relay mounting blocks»).
3. Turning the key in the ignition switch to position III (an assistant should do it), measure the voltage at the terminals of the battery. If the voltage is less than 8.6V, the battery needs to be charged.
4. Remove the battery from the car or disconnect the wire terminals from the battery terminals (see «Battery - removal and installation»).
5. For charging, we connect the charger to the terminals of the battery, observing the polarity, and only after that we turn on the charger in the mains. The charging current should not exceed 10% of the battery capacity in amperes, that is, for a battery with a capacity of 66 Ah, the maximum charge current is 6.6 A.
6. We charge the battery. The process is controlled by periodically checking the degree of infection, as described above. The charging time of a completely discharged battery is at least ten hours at the maximum charging current.
7. We stop charging the battery after the voltage at the terminals with the charger turned off reaches 12.6 V: first we disconnect the charger from the mains, and only after that we disconnect the wires from the battery terminals.
8. We put on the terminals of the power wires on the terminals of the battery. We tighten the nuts of the clamping bolts of the terminals and apply a protective varnish to the terminals and battery terminals.
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