Page 144 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

EXERCISE 8.3: Charge the battery

Objectives
At the end of this exercise you shall be able to
• connect the battery to charger
• charge battery by constant current method
• charge battery by constant volt method.

Requirements

Tools/Instruments Materials

• Trainee’s tool kit - 1 No. • Vaseline - as reqd.
• Hydrometer - 1 No. • Battery acid - as reqd.
• Voltmeter - 1 No. • Battery Cable/Wire with
crocodile clips - as reqd.
Equipments/Machines • Distilled water - as reqd.
• Battery charger - 1 No. • Cotton rag - as reqd.
• Light Motor Vehicle - 1 No. • Water emery - as reqd

Procedure

TASK 1: Battery charging
1 Place the battery on the charging table
2 If the battery is not sealed, check the electrolyte level in all of the cells and adjust the level if necessary.

Do not attempt to charge a battery that appears to be frozen or if ice crystals are visible in the electrolyte. Allow
the battery to become unfrozen fully before charging is attempted.
3 If the battery is sealed battery, check the built in hydrometer. Do not attempt to charge the battery if the
indicator appears clear or light yellow. (Fig 1)

4 Clean the battery terminals and the battery top
5 Consult an appropriate manual and determine the charging rate and time for the battery.
6 Turn off the charger switch. (Fig 2 & Fig 3). Connect the charger leads to the battery. The positive (+)lead must
be connected to the positive(+) terminal. The negative (-) lead must be connected to negative (-)terminal.
7 Turn on the charger switch

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