Isuzu N-Series. Manual — part 31

0B-2 MAINTENANCE AND LUBRICATION

MAINTENANCE SCHEDULE

For General Export

When performing the checks on the following items, regular inspection items should also be checked.

Abbreviations

I : Inspect, clean and correct or replace as necessary
A : Adjust
R : Replace or change
T : Tighten to specified torque
L : Lubricate
[V] : Variation (optional on some models).
[OPT] : Optional equipment.
[4JG] : For 4JG2 engine model.
[4JH] : For 4JH1-TC engine model.
[4J] : For 4J engine models.
[4HF1-2] : For 4HF1-2 engine model.
[4HK1-TC] : For 4HK1-TC engine model.
[4H] : For 4H engine model.
[MT] : For manual transmission model only.
[SA] : For Smoother model only.
*Marks: Under severe driving conditions, more frequent maintenance is required. Refer to “Maintenance schedule un-
der severe driving conditions”.

Maintenance Schedule

Use odometer reading or months whichever comes first

SERVICE
INTERVAL:

× 1,000
km

1

5

10 15

20

25 30

35

40

45 50

55

60

65 70

75

80 85

90

95 100

× 1,000
miles

0.6

3

6

9

12

15 18

21

24

27 30

33

36

39 42

45

48 51

54

57

60

or
months

1

3

6

9

12

15 18

21

24

27 30

33

36

39 42

45

48 51

54

57

60

[4J] ENGINE

*Engine oil

—

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

R

[4JH] *Engine oil

— — —

R

— —

R

— —

R

— —

R

— —

R

— —

R

— —

*Oil filter

— —

R

—

R

—

R

—

R

—

R

—

R

—

R

—

R

—

R

—

R

[4JH] *Engine oil
filter

— — —

R

— —

R

— —

R

— —

R

— —

R

— —

R

— —

Fuel filter

— — — —

R

— — —

R

— — —

R

— — —

R

— — —

R

[4JH] Fuel filter

— — — — — — — —

R

— — — — — — —

R

— — — —

*Air cleaner ele-
ment

— —

I

—

I

—

I

—

R

—

I

—

I

—

I

—

R

—

I

—

I

[4JH] *Air cleaner
element

— — — — — — — —

R

— — — — — — —

R

— — — —

Idling speed and
acceleration

— — — —

I

— — —

I

— — —

I

— — —

I

— — —

I

Valve clearances

I

— — — — — — —

A

— — — — — — —

A

— — — —

Fuel tank cap &
fuel pipes for
loose connec-
tions or damage

— — — — — — — —

I

— — — — — — —

I

— — — —

[OPT] [4JG] Tim-
ing belt

— — — — — — — — — — — — — — — — — — — —

R

MAINTENANCE AND LUBRICATION 0B-3

Drive belt ten-
sion and damage

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

[4JH] Drive belt
tension and dam-
age

Every 7,500 km (4,500 miles) Inspect

Radiator coolant

— — — — — — — —

R

— — — — — — —

R

— — — —

*Exhaust pipes
and mounting
damage or loose-
ness

— — — —

I

— — —

I

— — —

I

— — —

I

— — —

I

Cooling system

— — — —

I

— — —

I

— — —

I

— — —

I

— — —

I

Engine operation
condition

— —

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

[4H] ENGINE

*Engine oil

— —

R

—

R

—

R

—

R

—

R

—

R

—

R

—

R

—

R

—

R

[4HK1-TC]
*Engine oil

— — — —

R

— — —

R

— — —

R

— — —

R

— — —

R

*Oil filter

— —

R

—

R

—

R

—

R

—

R

—

R

—

R

—

R

—

R

—

R

[4HK1-TC] *Oil
filter

— — — —

R

— — —

R

— — —

R

— — —

R

— — —

R

Fuel filter: Main
fuel filter

— — — —

R

— — —

R

— — —

R

— — —

R

— — —

R

[OPT] Main fuel
filter and Sub fuel
filter: With sub
fuel filter

— — — — — — — —

R

— — — — — — —

R

— — — —

*Air cleaner ele-
ment

— —

I

—

I

—

I

—

R

—

I

—

I

—

I

—

R

—

I

—

I

Idling speed and
acceleration

— — — —

I

— — —

I

— — —

I

— — —

I

— — —

I

Valve clearances

I

— — — — — — —

A

— — — — — — —

A

— — — —

Feed pump
strainer (Except
[4HF1-2])

— — — —

I

— — —

I

— — —

I

— — —

I

— — —

I

Fuel tank cap &
fuel pipes for
loose connec-
tions or damage

— — — — — — — —

I

— — — — — — —

I

— — — —

Drive belt ten-
sion and damage

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

Radiator coolant

— — — — — — — —

R

— — — — — — —

R

— — — —

SERVICE
INTERVAL:

× 1,000
km

1

5

10 15

20

25 30

35

40

45 50

55

60

65 70

75

80 85

90

95 100

× 1,000
miles

0.6

3

6

9

12

15 18

21

24

27 30

33

36

39 42

45

48 51

54

57

60

or
months

1

3

6

9

12

15 18

21

24

27 30

33

36

39 42

45

48 51

54

57

60

0B-4 MAINTENANCE AND LUBRICATION

*Exhaust pipes
and mounting
damage or loose-
ness

— — — —

I

— — —

I

— — —

I

— — —

I

— — —

I

Cooling system

— — — —

I

— — —

I

— — —

I

— — —

I

— — —

I

Engine operation
condition

— —

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

[MT] CLUTCH

Clutch fluid

— —

I

—

I

—

I

—

R

—

I

—

I

—

I

—

R

—

I

—

I

Clutch pedal
travel and free
play

—

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

I

TRANSMISSION

*Manual trans-
mission oil

— —

I

—

I

—

I

—

R

—

I

—

I

—

I

—

R

—

I

—

I

[SA] Smoother
clutch fluid

— —

I

—

I

—

I

—

R

—

I

—

I

—

I

—

R

—

I

—

I

Gear control
mechanism for
looseness

— — — — — — — —

I

— — — — — — —

I

— — — —

Gear control
cable

— — — —

A

— — —

A

— — —

A

— — —

A

— — —

A

TRANSMIS-
SION WITH
TRANSFER
CASE (NPS
model only)

*Transmission
with transfer case
oil

— —

I

—

I

—

I

—

I

R

I

—

I

— —

I

R

—

R

—

I

Gear control
mechanism for
looseness

— — — — — — — —

I

— — — — — — —

I

— — — —

Gear control
cable

— — — —

A

— — —

A

— — —

A

— — —

A

— — —

A

REAR PROPEL-
LER SHAFT

*Universal joints
and sliding
sleeve

— — — —

L

— — —

L

— — —

L

— — —

L

— — —

L

Loose connec-
tions

— —

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

Splines for
excessive wear

— — — — — — — —

I

— — — — — — —

I

— — — —

SERVICE
INTERVAL:

× 1,000
km

1

5

10 15

20

25 30

35

40

45 50

55

60

65 70

75

80 85

90

95 100

× 1,000
miles

0.6

3

6

9

12

15 18

21

24

27 30

33

36

39 42

45

48 51

54

57

60

or
months

1

3

6

9

12

15 18

21

24

27 30

33

36

39 42

45

48 51

54

57

60

MAINTENANCE AND LUBRICATION 0B-5

Bearings and
related parts for
looseness

— — — — — — — —

I

— — — — — — —

I

— — — —

Center bearing

— — — —

L

— — —

L

— — —

L

— — —

L

— — —

L

FRONT PRO-
PELLER SHAFT
(NPS model
only)

*Universal joints,
double cardan
joint and sliding
sleeve

— — —

L

— —

L

— —

L

— —

L

— —

L

— —

L

— —

Loose connec-
tions

— — —

I

— —

I

— —

I

— —

I

— —

I

— —

I

— —

Splines for
excessive wear

— — — — — — — —

I

— — — — — — —

I

— — — —

REAR AXLE

*Differential gear
oil

— —

I

—

I

—

I

—

R

—

I

—

I

—

I

—

R

—

I

—

I

FRONT AXLE

*Kingpin

— —

L

—

L

—

L

—

L

—

L

—

L

—

L

—

L

—

L

—

L

Differential gear
oil (NPS model
only)

— — —

I

— —

I

— — I/R — —

I

— —

I

— — I/R — —

STEERING

Manual steering
gear oil

— — — — — —

I

— — — — —

I

— — — — —

I

— —

[OPT] Power
steering system
oil leakage

— —

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

[OPT] Power
steering fluid

— — — — — — — —

R

— — — — — — —

R

— — — —

* [OPT] Power
steering system
for looseness or
damage

— —

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

Fitting of knuck-
les and front axle
for looseness

— —

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

—

I

Steering mecha-
nism for loose-
ness or damage

— — — — — — — —

I

— — — — — — —

I

— — — —

SERVICE
INTERVAL:

× 1,000
km

1

5

10 15

20

25 30

35

40

45 50

55

60

65 70

75

80 85

90

95 100

× 1,000
miles

0.6

3

6

9

12

15 18

21

24

27 30

33

36

39 42

45

48 51

54

57

60

or
months

1

3

6

9

12

15 18

21

24

27 30

33

36

39 42

45

48 51

54

57

60