Isuzu N-Series. Manual - part 403

 

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Isuzu N-Series. Manual - part 403

 

 

6D1-2 ENGINE ELECTRICAL

BATTERY

General Description

There are six battery fluid caps at the top of the battery.
The battery is completely sealed except for the six small
vent holes at the side. These vent holes permit the es-
cape of small amounts of gas generated by the battery.
This type of battery has the following advantages over
conventional batteries:

1. There is no need to add water during the entire ser-

vice life of the battery.

2. The battery protects itself against overcharging.

The battery will refuse to accept an excessive
charge.
(A conventional battery will accept an excessive
charge, resulting in gassing and loss of battery flu-
id.)

3. The battery is much less vulnerable to self-dis-

charge than a conventional type battery.

Diagnosis

Visual Inspection

Inspect the battery for obvious physical damage, such
as a cracked or broken case, which would permit elec-
trolyte loss.
Replace the battery if obvious physical damage is dis-
covered during inspection.
Check for any other physical damage and correct it as
necessary. If not, proceed to “Hydrometer check”.

Hydrometer Check

There is a built-in hydrometer (Charge test indicator) at
the top of the battery. It is designed to be used during di-
agnostic procedures.
Before trying to read the hydrometer, carefully clean the
upper battery surface.
If your work area is poorly lit, additional light may be nec-
essary to read the hydrometer.

a. BLUE RING OR DOT VISIBLE - Go to “Voltage

check”.

b. BLUE RING OR DOT NOT VISIBLE - Go to

“Fluid level check”.

Fluid Level Check

The fluid level should be between the upper level line
and lower level line on side of the battery.

a. CORRECT FLUID LEVEL - Charge the battery.
b. BELOW LOWER LEVEL - Replace battery.

Voltage Check

1. Put voltmeter test leads to battery terminals.

a. VOLTAGE IS 12.4V OR ABOVE - Go to “Load

test”.

b. VOLTAGE IS UNDER 12.4V - Go to procedure

2 below.

2. Determine fast charge amperage from specifica-

tion.
(See Main Data and Specifications in this section).
Fast charge battery for 30 minutes at amperage
rate no higher than specified value.
Take voltage and amperage readings after charge.
a. VOLTAGE IS ABOVE 16V AT BELOW 1/3 OF

AMPERAGE RATE - Replace battery.

b. VOLTAGE IS ABOVE 16V AT ABOVE 1/3 OF

AMPERAGE RATE - Drop charging voltage to
15V and charge for 10 — 15 hours.

Then go to “Load test”.
c. VOLTAGE IS BETWEEN 12V AND 16V - Con-

tinue charging at the same rate for an additional
3-1/2 hours. Then go to “Load test”.

d. VOLTAGE IS BELOW 12V - Replace battery.

Load Test

1. Connect a voltmeter and a battery load tester

across the battery terminals.

2. Apply 300 ampere load for 15 seconds to remove

surface charge from the battery.
Remove load.

Legend

1. Battery
2. Upper level
3. Lower level

N6A0983E

ENGINE ELECTRICAL 6D1-3

3. Wait 15 seconds to let battery recover. Then apply

specified load from specifications (See Main Data
and Specifications in this section).
Read voltage after 15 seconds, then remove load.
1) VOLTAGE DOES NOT DROP BELOW THE

MINIMUM LISTED IN FOLLOWING TABLE -
The battery is good and should be returned to
service.

2) VOLTAGE IS LESS THAN MINIMUM LISTED

-Replace battery.

On-vehicle Service

Battery Charging

Observe the following safety precautions when charging
the battery:

1. Never attempt to charge the battery when the fluid

level is below the lower level line on the side of the
battery.
In this case, the battery must be replaced.

2. Pay close attention to the battery during the charg-

ing procedure.
Battery charging should be discontinued or the rate
of charge reduced if the battery feels hot to the
touch.
Battery charging should be discontinued or the rate
of charge reduced if the battery begins to gas or
spew electrolyte from the vent holes.

3. In order to more easily view the hydrometer blue

dot or ring, it may be necessary to jiggle or tilt the
battery.

4. Battery temperature can have a great effect on bat-

tery charging capacity.

5. The sealed battery used on this vehicle may be ei-

ther quick-charged or slow-charged in the same
manner as other batteries.
Whichever method you decide to use, be sure that
you completely charge the battery. Never partially
charge the battery.

Jump Starting

Jump Starting With An Auxiliary (Booster) Battery

Caution:
Never push or to the vehicle in an attempt to start it.
Serious damage to the emission system as well as other
vehicle parts will result.
Treat both the discharged battery and the booster bat-
tery with great care when using jumper cables.
Carefully follow the jump starting procedure, being care-
ful at all times to avoid sparking.

Warning:

WARNING:
FAILURE TO CAREFULLY FOLLOW THE JUMP
STARTING PROCEDURE COULD RESULT IN THE
FOLLOWING:

1. SERIOUS PERSONAL INJURY, PARTICULAR-

LY TO YOUR EYES.

2. PROPERTY DAMAGE FROM A BATTERY EX-

PLOSION, BATTERY ACID, OR AN ELECTRI-
CAL FIRE.

3. DAMAGE TO THE ELECTRONIC COMPO-

NENTS OF ONE OR BOTH VEHICLES PARTIC-
ULARLY.

Never expose the battery to an open flame or electrical
spark. Gas generated by the battery may catch fire or
explode.
Remove any rings, watches, or other jewelry before
working around the battery. Protect your eyes by wear-
ing an approved set of goggles.
Never allow battery fluid to come in contact with your
eyes or skin.
Never allow battery fluid to come in contact with fabrics
or painted surfaces.
Battery fluid is a highly corrosive acid.
Should battery fluid come in contact with your eyes,
skin, fabric, or a painted surface, immediately and thor-
oughly rinse the affected area with clean tap water.
Never allow metal tools or jumper cables to come in con-
tact with the positive battery terminal, or any other metal
surface of the vehicle. This will protect against a short
circuit.
Always keep batteries out of the reach of young chil-
dren.
Jump Starting Procedure

1. Set the vehicle parking brake.

If the vehicle is equipped with an automatic trans-
mission, place the selector lever in the “PARK” po-
sition.
If the vehicle is equipped with a manual transmis-
sion, place the shift lever in the “NEUTRAL” posi-
tion.
Turn “OFF” the ignition.
Turn “OFF” all lights and any other accessory re-
quiring electrical power.

2. Look at the built-in hydrometer.

If the indication area of the built-in hydrometer is
completely clear, do not try to jump start.

ESTIMATED TEMPERA-

TURE

MINIMUM VOLTAGE

°F

°C

70

21

9.6

60

16

9.5

50

10

9.4

40

4

9.3

30

−1

9.1

20

−7

8.9

10

−12

8.7

0

−18

8.5

The battery temperature must be estimated by feel 
and by the temperature the battery has been 
exposed to for the preceding few hours.

6D1-4 ENGINE ELECTRICAL

3. Attach the end of one jumper cable to the positive

terminal of the booster battery.
Attach the other end of the same cable to the pos-
itive terminal of the discharged battery.
Do not allow the vehicles to touch each other.
This will cause a ground connection, effectively
neutralizing the charging procedure.
Be sure that the booster battery has a 12 volt rat-
ing.

4. Attach one end of the remaining cable to the nega-

tive terminal of the booster battery.
Attach the other end of the same cable to a solid
engine ground (such as the A/C compressor brack-
et or the generator mounting bracket) of the vehicle
with the discharged battery.
This ground connection must be at least 450 mm
(18 in) from the battery of the vehicle whose battery
is being charged.

Warning:

WARNING:
NEVER ATTACH THE END OF THE JUMPER CABLE
DIRECTLY TO THE NEGATIVE TERMINAL OF THE
DEAD BATTERY.

5. Start the engine of the vehicle with the good bat-

tery.
Make sure that all unnecessary electrical accesso-
ries have been turned “OFF”.

6. Start the engine of the vehicle with the dead bat-

tery.

7. To remove the jumper cables, follow the above di-

rections in the reverse order.

Be sure to first disconnect the negative cable from
the vehicle with the discharged battery.

Removal

1. Negative cable
2. Positive cable
3. Retainer screw and rods
4. Retainer
5. Battery

Installation

To install the battery, follow the removal procedure in
the reverse order, noting the following points:

1. Make sure that the rod is hooked on the body side.

Main Data and Specifications

N6A0984E

Model

(JIS)

65D23R

75D23R

80D26R

115E41R

DELCO 31-750

Voltage

(V)

12

12

12

12

12

Cold-Cranking Performance

(Amp)

520

356

750

Reserve Capacity

(Min.)

180

133

160

 

 

 

 

 

 

 

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