Battery Service Battery Service

Chapter 31Chapter 31

Page 413Page 413

Charging and Discharging batteries

gives off Hydrogen Gas---

Very Flammable—Don’t make sparks or

have open flame!

The Hindenburg Was Filled With Hydrogen!!!!!

Check Battery’s Check Battery’s ConditionCondition Date of ManufactureDate of Manufacture

Case ConditionCase Condition – swelling, leaking, – swelling, leaking, cracks, meltingcracks, melting

Cables, clamps, battery tray, and hold Cables, clamps, battery tray, and hold downsdowns..

Level of Electrolyte-Level of Electrolyte- check Magic eye check Magic eye (maintenance free), look at the side of (maintenance free), look at the side of case- (sometimes you can see level case- (sometimes you can see level through side), remove caps and check through side), remove caps and check levels.levels.

Low Good Bad Electrolyte

Magic Eye

Remove, Service, and Replace Remove, Service, and Replace BatteryBattery

Refilling Battery with Refilling Battery with WaterWater

Use clean filter water Use clean filter water only- distilled water is only- distilled water is the best.the best.

When levels are low, it When levels are low, it is down on water. is down on water. *Electrolyte doesn't *Electrolyte doesn't evaporate.*evaporate.*

Look carefully at the Look carefully at the opening- there will be opening- there will be a line inside the a line inside the opening that indicates opening that indicates proper level. proper level.

Cleaning Terminals and Cleaning Terminals and ClampsClamps

Lead oxidation Lead oxidation (black)(black)

Corrosion (white Corrosion (white powder)powder)

Sprays and Terminal Sprays and Terminal CleanerCleaner

Cleaning Case Tray and Cleaning Case Tray and Stray AcidStray Acid

A mix of baking A mix of baking soda and water will soda and water will neutralize the acid. neutralize the acid. A 50/50 mix usually A 50/50 mix usually works well.works well.

Remove the batteryRemove the battery

and clean the tray, and clean the tray, case,case,

posts, cables, and posts, cables, and clamps.clamps.

Removing and Replacing Removing and Replacing BatteryBattery Shut off all electronics in the vehicle- Shut off all electronics in the vehicle-

this will reduce the chance for sparks.this will reduce the chance for sparks. Remove Remove NEGATIVENEGATIVE clamp clamp FIRSTFIRST then then

thethe positive next.positive next. Service battery-clean, replace water, etcService battery-clean, replace water, etc Replace Replace POSITIVEPOSITIVE clamp clamp FIRSTFIRST the the

then negativethen negative

(Negative off first-----Negative on (Negative off first-----Negative on last)last)

Battery ToolsBattery ToolsClamp Puller

Don’t use hammer!

Hydrometer

More ToolsMore Tools

Clamp Spreaders

Clamp Bolt PliersBattery Carrier

Computer Memory Tool--- 9 volt batteryKeep all electronics off

Final ResultFinal Result

Hydrometer TestsHydrometer Tests

SPECIFIC GRAVITY of SPECIFIC GRAVITY of ELECTROLYTEELECTROLYTE

100% charge 1.265100% charge 1.265

75% charge 1.23975% charge 1.239

50% charge 1.20050% charge 1.200

25% charge 1.17025% charge 1.170

fully discharged fully discharged 1.1101.110at 75 degreesat 75 degrees

(Specific Gravity =Weight)

Voltage TestVoltage Test

Battery TestingBattery Testing

Jump Starting SafetyJump Starting Safety

+-+ +

-

Need Heavy Cables--- Those tread-thin emergency type are Need Heavy Cables--- Those tread-thin emergency type are not good enough.not good enough.Set up as follows:Set up as follows:

Jump StartingJump Starting

Battery Drain TestBattery Drain Test

Test for key-off drains (parasitic drain)Test for key-off drains (parasitic drain) Place amp meter in seriesPlace amp meter in series Make sure all lights, Make sure all lights,

electronics, etc. are off.electronics, etc. are off. No more that 50 milli ampsNo more that 50 milli amps Test light substitute---Test light substitute---

Should not lightShould not light*hood, trunk, glove box?*hood, trunk, glove box?

Battery Leakage TestBattery Leakage Test

Place one clip on positive terminalPlace one clip on positive terminal Place other lead over all suspected Place other lead over all suspected

places on battery you think may be places on battery you think may be acid.acid.

Voltage on meter =LeakVoltage on meter =Leak

Your Job.Your Job.

Complete chapter Questions 1-10 Complete chapter Questions 1-10 (review) and 1-5 (ASE-style). Page 430(review) and 1-5 (ASE-style). Page 430

Write on a separate paper and write Write on a separate paper and write out the complete question and your out the complete question and your answer. ( do not write the other answer. ( do not write the other answer options). answer options).

Complete the chapter worksheet (I will Complete the chapter worksheet (I will give it out). You may write on it. give it out). You may write on it.

File all items in your note book.File all items in your note book. Notebooks will be graded in the future.Notebooks will be graded in the future.