Isuzu N-Series. Service manual — part 1309
1尧Frame 2尧Spare wheel riser as鄄
sembly 3尧Eccentric wheel
4尧Spare wheel 5尧Chain 6尧Carrier
spare wheel riser set
54
HFC1048
series trucks
55
IV尧Electrical equipment
(玉) Starter
(域) Generator and adjuster
(芋) Illumination equipments
(郁) Battery
(吁) Sensor
57
Use the measuring cell to testing.
Put the car and the measuring cell
for a line, from measuring cell screen
to testing left, right, the far and near
light beam to project light upon di鄄
rections to be partial to move a value
respectively.
To adjusting the headlight' the up鄄
rightess and the level. To adjusting
the passing beam , make it match di鄄
agram the shining area center re鄄
quest a left and right light to left and
right (the V is left-the V is left, the V
is right-the V is right for the middle
point) be partial to move a value to
be no bigger than a 100 mms.
2. Small light
Two small lights are embedded on
the two symmetrical corner of front
panel. They should be turned on
Right
Screen
Left
Left
Right
10 m
headlamp(old series)
(玉)Starter
Note:
1) Starter should be connected with
battery correctly.
2) Every time start, don't keep starter
work continuously for more than 15s
and stop for 1-2 seconds in the in鄄
terval, since over hot may damage it.
Rest it before try start once again.
3) After several continuative failures,
check starter, solenoid switch, bat鄄
tery, wires, and also oil supply sys鄄
tem. Retry after trouble is shot.
(域)Generator and adjuster
Note:
1) Generator should be connected
with adjuster correctly, and the po鄄
larities of generator and adjuster
should be matched properly.
2) Never check generator by short-
circuit fire wire and magnetic field.
3冤The diode and insulation of gener鄄
ator can be inspected with multime鄄
ter and
ohmmeter.
Don't
use
megohmmeter to inspect, also AC
power whose voltage exceeds 200v.
(芋) Illuminate equipments
1. Headlamp
This series of truck have two head鄄
lamps which are embedded in front
of cab symmetrically. The headlamp
which is called double filament bulb
has two different pieces of filament
and can shine two different kinds of
ray, the brighter one is used as high
lamp while the dimmer one is used
as low lamp. Running in night, turn
on the high lamp to lighten the road,
but switch to low lamp when two ve鄄
hicles pass each other.
In order to see the road clearly ,
when you stripping and re-assembly
headlight that you sould be adjuste鄄
ment the position . The way is to put
the car on a evenly road then put a
screen in front of the car. The dis鄄
tance between the car and the
screen is about 10meters.(as picture)
56
headlamp(new series)
HFC1048
series trucks
59
pacitance into battery. Cut down the
charging current for half after single
cell's voltage reaches 2.4V. After
charging battery for 3~5 hours, if the
specific gravity of electrolyte don't
rise any more, keep on charging for
2~3 more hours. Table 2 shows the
relationship between temperature
and the corrected specific gravity
value of electrolyte.
6)Protect the joint of terminal post
and wire from dirt and loose, or the
terminal post will be burnt. Applying
a Vaseline coat on the terminal post
after tighten the joint which can pro鄄
tect joint from rust and loose contact,
so that engine can be started easily.
7)If left unused for a long time, bat鄄
tery should be removed and pre鄄
served in a place where is dry,
shady, cool, and ventilative And do
the additional charging every month.
(吁)Sensor
1. Fuel level gauge sensor
The fuel level sensor is sliding re鄄
sister. Floating on the fuel level, the
float rises and drops with the level's
change. This change causes the re鄄
sister connected in circuit and short鄄
ed, and make the electromagnetic fu鄄
el level gauge changes. Connecting
the fuel level alarm lamp's terminal
with the indicator light can shows the
lowest fuel level.
2. Water temp sensor
The temp sensor is a thermistor
which is mounted in water jacket to
detect the temp of cooling water. It is
connected with the water temp
gauge on instrument board. The wa鄄
Loca
Specific gravity of
fully charged bat鄄
tery under 15益
Where temp above -30益 in winter
1.290 1援260
Where temp above -20益 in winter
1援280 1援250
Where temp above -10益 in winter
1援270 1援240
Where temp below 0益 in winter
1援270 1援240
Winter Summer
Where temp below -40益 in winter
1援310 1援270
Table 1 Specific gravity of electrolyte
Measured temp
of electrolyte
+45益+30益+15益 0益 -15益-30益-45益
Corrected value
on hydrometer
+0.02 +0.01 0 -0.01 -0.02 -0.03 -0.04
Table 2 Corrected specific gravity
value of electrolyte under 15益
when vehicle park in dark or fog, al鄄
so when run in day to show the posi鄄
tion and the width of the vehicle.
3. Fog lamp
Fog lamp can light further in fog than
other lamp. They should be turned
on when vehicle run or park in fog or
in dark, so that vehicle can be seen
clearly. Fog lamp is combined with
headlamp.
4. Ceiling lamp
The ceiling lamp is installed on the
ceiling, and it is combined with in鄄
side rear mirror together. It can light鄄
en the cab, and also it can observe
the condition behind.
(郁)Battery
1. General
The battery of this series is aneroid,
and it is sealed by a plastic case.
This kind of battery has a big capac鄄
ity and a light weight.
2. Use & Note
1) Keep the case clean, and protect
battery from leak.
2) Make sure that the hole on the
upper cap not choked, or the plate
will be damaged by the vapor pro鄄
duced own to electrolyzing.
3)The electrolyte level should be 10~
15mm higher than plate. Only dis鄄
tilled water can be filled into battery.
Never fill battery with fountain or river
water, for them will do harm to it.
4)Check the electrolyte for specific
gravity and level. Do it every 10~15
days in winter, while do it every 5~10
days in summer. Specific gravity is
measured with gravimeter. Table 1
shows normal specific gravity of
electrolyte.
5)The battery should always being
charged. Check battery for electrical
voltage if engine is hard to be start鄄
ed. Additional charging if it is detect鄄
ed that specific gravity of electrolyte
lower than 1.18 ~1.20, or battery
plates will be vulcanized and it will
do harm to the plates. Additional
charging should be held for 13 ~16
hours, and it can breathe 1/10 of ca鄄
58
HFC1048
series trucks
61
吁尧Vehicle service and maintenance
(玉) Notice during running-in period
(域) Daily maintenance
(芋) Second-class maintenance
(郁) Seasonal maintenance
ter temp sensor has a negative tem鄄
perature coefficient and its resistance
decreases with the increase of water
temperature. Don't replace the sen鄄
sor with a positive temperature coef鄄
ficient one, or the water temp gauge
can not work correctly.
3. Oil pressure alarm
Oil pressure alarm is a normal closed
switch. It will be opened when oil
pressure reaches and over the low鄄
est pressure, so that circuit is dis鄄
connected and indicator goes out.
60
HFC1048
series trucks
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