Page 140 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

EXERCISE 8.2: Check Battery Condition

Objectives

At the end of this exercise you shall be able to
• clean the battery terminals and body of the batteries
• top up the battery electrolyte level
• test the battery specific gravity with a hydrometer
• test the battery with a volt meter.

Requirements

Tools/Instruments

• Trainee’s tool kit - 1 No. • Cotton rag -as reqd.
• Hydrometer - 1 No. • Distilled water -as reqd.
• Digital multimeter - 1 No. • water emery -as reqd.
• Battery tester - 1 No. • Vaseline -as reqd.
• 12v lead acid battery - 1 No. • sodium bicarbonate -as reqd.
• Temperature Gauge/thermometer - 1 No. • Bristle brush -1 No.
• sterile gloves -1 Pair
Equipments/Machines • safety goggles -1 No.
• Air compressor - 1 No.

Procedure

TASK 1 : Cleaning and top up of lead acid battery

1 Clean the battery casing using cotton cloth.
2 Apply a solution of baking soda and water over the battery casing.
3 Use a stiff bristle with brush and clean the dirty particles.

Note: Be sure the solution cannot enter the battery cells. Do not clean the battery top surface
keeping the vent plugs open.

4 Rinse the battery with clean water.

5 Wipe the battery casing with dry cloth and remove the wetness.
6 Un screw all the went plugs and check the level of the electrolyte.

Note: Do not use open flame to check the electrolyte level.

7 Top up the electrolyte to the marked level up to max level in all the cells with distilled water.
Note:
• If marking levels are not provided in the battery top up the electrolyte minimum 10mm over the
plates.
• No acid should be used to top up the electrolyte.
• Do not over fill the electrolyte

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