The battery contains a visual test indicator which gives a green
signal when an adequate charge level exists, and a dark signal
when charging is required.

BATTERY VISUAL INSPECTION (2)

Make sure ignition switch is in "LOCK" (OFF) position and all
battery fed accessories are OFF.
1. Disconnect the negative cable from battery before

disconnecting the positive cable.

WARNING

Care should be taken in the event battery case is
cracked or leaking to protect hands from the electro-
lyte. A suitable pair of rubber gloves (not the house-
hold type) should be worn when removing battery by
hand.

2. Remove the battery from the vehicle.

ACX01557

INDICATOR

DARK EYE:CHARGING NECESSARY
GREEN:GOOD CONDITION

BATTERY

TSB Revision

CHASSIS ELECTRICAL

54A-5

3. Inspect battery carrier for damage caused by loss of acid

from battery. If acid damage is present, it is necessary to
clean area with a solution of clean warm water and baking
soda. Scrub area with a stiff bristle brush. Wipe clean with a
cloth moistened with ammonia or baking soda in water.

4. Clean the battery, especially the top with same solutions as

described in step 3.

5. Inspect the battery case and cover for cracks. If cracks are

present, battery must be replaced.

6. Clean the battery post with a suitable battery post cleaning

tool.

7. Clean the inside surfaces of the terminal clamps with a

suitable battery terminal cleaning tool. Replace damaged or
frayed cables and broken terminal clamps.

8. Install the battery in the vehicle.
9. Connect the positive and negative cables to the battery in

the order of mention.

10.Tighten the clamp nut securely.

BATTERY CHARGING

M1541001100350

WARNING

When batteries are being charged, an explosive gas forms beneath the cover of each cell. Do
not smoke near batteries on charge or which have recently been charged. Do not break live
circuits at the terminals of the batteries on charge. A spark will occur where the live circuit is
broken. Keep all open flames away from the battery.

Battery electrolyte temperature may temporarily be
allowed to rise to 55

°C (131°F). Increase of electro-

lyte temperature above 55

°C (131°F) is harmful to

the battery, causing deformation of battery cell,
decrease in life of battery, etc.

CHARGE RATE

If the test indicator is dark, the battery should be
charged as outlined below. When the dot appears or
when maximum charge shown below is reached,
charging should be stopped.

Charge Rate Chart

BATTERY

80D26L-MF

Slow charging

5 amps 12 hours
10 amps 6 hours

Fast charging

20 amps 2.5 hours
30 amps 0.5 hours

BATTERY

TSB Revision

CHASSIS ELECTRICAL

54A-6

BATTERY TEST

M1541001200357

BATTERY TESTING PROCEDURE

STEP 1. Check the battery cables.
Remove the negative cable, then the positive cable.
Check for dirty or corroded connections.

Q: Are the battery cables dirty or have corroded

connections?
YES :

Clean the battery cables. Then go to Step 2.

NO :

Go to Step 2.

STEP 2. Check the battery post.
Check for loose battery post.

Q: Are the battery post faulty?

Yes :

Replace the battery. Then go to Step 4.

NO :

Go to Step 3.

STEP 3. Check the battery case and cover.
(1) )Remove the hold-downs and shields.
(2) Check for broken/cracked case or cover.

Q: Is the battery case or cover faulty?

YES :

Replace the battery. Then go to Step 4.

NO :

Go to Step 4.

STEP 4. Check the open circuit voltage.
(1) Turn headlights on for 15 seconds.
(2) Turn headlights off for two minutes to allow

battery positive voltage to stabilize.

(3) Disconnect the battery cables.
(4) Read open circuit voltage.

Q: Is open circuit voltage 12.4 volts or more?

NO :

Go to Step 5.

YES :

Go to Step 6.

STEP 5. Charge battery.

Q: Charging the battery?

YES :

Charge the battery at 5 amps for 15 hours.

Then re-test, go to Step 4.

NO :

Go to Step 6.

STEP 6. Check the load test.
(1) Connect a load tester to the battery.
(2) Load the battery at the recommended discharge

rate (See LOAD TEST RATE CHART) for 15
seconds.

(3) Read voltage after 15 seconds, then remove

load.

(4) Compare the measured value with the minimum

voltage. (See LOAD TEST CHART.)

Q: Is the voltage higher than minimum voltage?

NO :

Replace the battery. Then go to Step 4.

YES :

The battery is normal.

LOAD TEST CHART

LOAD TEST RATE CHART

TEMPERATURE
°C (°F)

21 (70)
AND
ABOVE

16 (60)

10 (50)

4 (40)

−1 (30)

−7 (20)

−12 (10) −18 (0)

Minimum voltage

9.6

9.5

9.4

9.3

9.1

8.9

8.7

8.5

Load test

300 amps

Cranking ratio (0

°F)

582 amps

Reserve capacity

133 minutes

Application

80D26L-MF

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