Isuzu N-Series. Service manual — part 33

0B-10 MAINTENANCE AND LUBRICATION

For Australia and Taiwan

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.
[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: 4JH1-TC Engine Model (ACEA B2 Specification Engine Oil)

SERVICE INTERVAL:

(Use odometer
reading or months
Whichever comes
first)

× 1,000
km

10

20

30

40

50

60

70

80

90

100

× 1,000
mile

6

12

18

24

30

36

42

48

54

60

ENGINE

*Engine oil

R

R

R

R

R

R

R

R

R

R

or every 6 months

*Engine oil filter

R

R

R

R

R

R

R

R

R

R

or every 6 months

Fuel filter

—

R

—

R

—

R

—

R

—

R

or every 12 months

*Air cleaner element

I

I

I

R

I

I

I

R

I

I

or every 24 months

Idling speed and acceleration

—

I

—

I

—

I

—

I

—

I

or every 12 months

Valve clearances

—

—

—

A

—

—

—

A

—

—

or every 24 months

Fuel tank cap and fuel pipes for
loose connections or damage

—

—

—

I

—

—

—

I

—

—

or every 24 months

Drive belt tension and damage

I

I

I

I

I

I

I

I

I

I

or every 6 months

Radiator coolant

—

—

—

R

—

—

—

R

—

—

or every 24 months

*Exhaust pipes and mountings
for looseness or damage

—

I

—

I

—

I

—

I

—

I

or every 12 months

Cooling system for water leak-
age

—

I

—

I

—

I

—

I

—

I

or every 12 months

Engine operation condition

I

I

I

I

I

I

I

I

I

I

or every 6 months

CLUTCH

Clutch fluid

I

I

I

R

I

I

I

R

I

I

or every 24 months

Clutch pedal travel and free
play

I

I

I

I

I

I

I

I

I

I

or every 6 months

TRANSMISSION

*Manual transmission oil

I

I

I

R

I

I

I

R

I

I

or every 24 months

Gear control mechanism for
looseness

—

—

—

I

—

—

—

I

—

—

or every 24 months

Gear control cables

—

A

—

A

—

A

—

A

—

A

or every 12 months

PROPELLER SHAFT

*Universal joints and sliding
sleeve grease

—

L

—

L

—

L

—

L

—

L

or every 12 months

MAINTENANCE AND LUBRICATION 0B-11

Loose connections

I

I

I

I

I

I

I

I

I

I

or every 6 months

Splines for excessive wear

—

—

—

I

—

—

—

I

—

—

or every 24months

Bearings and related parts for
looseness

—

—

—

I

—

—

—

I

—

—

or every 24 months

Center bearing

—

L

—

L

—

L

—

L

—

L

or every 12 months

REAR AXLE

*Differential gear oil

I

I

I

R

I

I

I

R

I

I

or every 24 months

FRONT AXLE

*Kingpins

L

L

L

L

L

L

L

L

L

L

or every 6 months

STEERING

Power steering system oil leak-
age

I

I

I

I

I

I

I

I

I

I

or every 6 months

Power steering system for
looseness or damage

I

I

I

I

I

I

I

I

I

I

or every 6 months

Power steering fluid

—

—

—

R

—

—

—

R

—

—

or every 24 months

Power steering hoses

—

—

—

—

—

—

—

R

—

—

or every 48 months

Fitting of knuckles and front
axle for looseness

I

I

I

I

I

I

I

I

I

I

or every 6 months

Steering mechanism for loose-
ness or damage

—

—

—

I

—

—

—

I

—

—

or every 24 months

Ball joints for damage (Inde-
pendent suspension model
only)

I

I

I

I

I

I

I

I

I

I

or every 6 months

Ball joints for excessive play
(Independent suspension
model only)

I

I

I

I

I

I

I

I

I

I

or every 6 months

Relay lever shaft for excessive
play (Independent suspension
model only)

I

I

I

I

I

I

I

I

I

I

or every 6 months

Steering wheel play

I

I

I

I

I

I

I

I

I

I

or every 6 months

Steering function

I

I

I

I

I

I

I

I

I

I

or every 6 months

Wheel alignment

—

—

—

I

—

—

—

I

—

—

or every 24 months

SERVICE BRAKES

Brake fluid

I

I

I

R

I

I

I

R

I

I

or every 24 months

Brake system for fluid leakage

I

I

I

I

I

I

I

I

I

I

or every 6 months

*Brake linings and drums for
wear

I

I

I

I

I

I

I

I

I

I

or every 6 months

*Disc brake pads and discs for
wear

I

I

I

I

I

I

I

I

I

I

or every 6 months

Brake pedal travel and free play

I

I

I

I

I

I

I

I

I

I

or every 6 months

Pipes and hoses for loose con-
nections or damage

I

I

I

I

I

I

I

I

I

I

or every 6 months

SERVICE INTERVAL:

(Use odometer
reading or months
Whichever comes
first)

× 1,000
km

10

20

30

40

50

60

70

80

90

100

× 1,000
mile

6

12

18

24

30

36

42

48

54

60

0B-12 MAINTENANCE AND LUBRICATION

(I): Inspect and correct or replace as necessary (A): Adjust (R): Replace or change (T): Tighten to specified torque
(L): Lubricate

PARKING BRAKE

Parking brake cables

I

I

I

I

I

I

I

I

I

I

or every 6 months

Parking brake function

I

I

I

I

I

I

I

I

I

I

or every 6 months

Parking brake lever travel

I

I

I

I

I

I

I

I

I

I

or every 6 months

Linings for wear

—

—

—

I

—

—

—

I

—

—

or every 24 months

Drum for wear or damage

—

—

—

I

—

—

—

I

—

—

or every 24 months

Ratchet for wear or damage

—

—

—

I

—

—

—

I

—

—

or every 24 months

SUSPENSION

Spring leaves for damage

I

I

I

I

I

I

I

I

I

I

or every 6 months

Torsion bar spring (Indepen-
dent suspension model only)

I

I

I

I

I

I

I

I

I

I

or every 6 months

Ball joint boots for damage
(Independent suspension
model only)

I

I

I

I

I

I

I

I

I

I

or every 6 months

Ball joints for excessive play
(Independent suspension
model only)

—

—

—

I

—

—

—

I

—

—

or every 24 months

Mounts for looseness or dam-
age

I

I

I

I

I

I

I

I

I

I

or every 6 months

Shock absorbers for oil leakage

I

I

I

I

I

I

I

I

I

I

or every 6 months

Shock absorbers mount for
looseness

I

I

I

I

I

I

I

I

I

I

or every 6 months

Upper links (Independent sus-
pension model only)

L

L

L

L

L

L

L

L

L

L

or every 6 months

WHEELS

Wheel pins and nuts

—

T

—

T

—

T

—

T

—

T

or every 12 months

Wheel discs for damage

—

I

—

I

—

I

—

I

—

I

or every 12 months

Hub bearings grease

—

—

—

R

—

—

—

R

—

—

or every 24 months

Tire pressures and damage

I

I

I

I

I

I

I

I

I

I

or every 6 months

ELECTRICAL EQUIPMENT

Specific gravity of battery elec-
trolyte

I

I

I

I

I

I

I

I

I

I

or every 6 months

OTHERS

Lights, horn, windshield, wiper
and washers

I

I

I

I

I

I

I

I

I

I

or every 6 months

Bolts and nuts on chassis and
body

—

—

—

I

—

—

—

I

—

—

or every 24 months

SERVICE INTERVAL:

(Use odometer
reading or months
Whichever comes
first)

× 1,000
km

10

20

30

40

50

60

70

80

90

100

× 1,000
mile

6

12

18

24

30

36

42

48

54

60

MAINTENANCE AND LUBRICATION 0B-13

Maintenance Schedule: 4JH1-TC Engine Model (Engine Oil that Meets or Exceeds ACEA B3 Speci-
fication)

SERVICE INTERVAL:
(Use odometer
reading or months
Whichever comes
first)

× 1,000
km

15

30

45

60

75

90

105 120 135 150

× 1,000
mile

9

18

27

36

45

54

63

72

81

90

ENGINE

*Engine oil

R

R

R

R

R

R

R

R

R

R

or every 9 months

*Engine oil filter

R

R

R

R

R

R

R

R

R

R

or every 9 months

Fuel filter

—

R

—

R

—

R

—

R

—

R

or every 18 months

*Air cleaner element

I

I

I

R

I

I

I

R

I

I

or every 36 months

Idling speed and acceleration

—

I

—

I

—

I

—

I

—

I

or every 18 months

Valve clearances

—

—

—

A

—

—

—

A

—

—

or every 36 months

Fuel tank cap and fuel pipes for
loose connections or damage

—

—

—

I

—

—

—

I

—

—

or every 36 months

Drive belt tension and damage

I

I

I

I

I

I

I

I

I

I

or every 9 months

Radiator coolant

—

—

—

R

—

—

—

R

—

—

or every 36 months

*Exhaust pipes and mountings
for looseness or damage

—

I

—

I

—

I

—

I

—

I

or every 18 months

Cooling system for water leak-
age

—

I

—

I

—

I

—

I

—

I

or every 18 months

Engine operation condition

I

I

I

I

I

I

I

I

I

I

or every 9 months

CLUTCH

Clutch fluid

I

I

I

R

I

I

I

R

I

I

or every 24 months

Clutch pedal travel and free
play

I

I

I

I

I

I

I

I

I

I

or every 6 months

TRANSMISSION

*Manual transmission oil

I

I

I

R

I

I

I

R

I

I

or every 24 months

Gear control mechanism for
looseness

—

—

—

I

—

—

—

I

—

—

or every 24 months

Gear control cables

—

A

—

A

—

A

—

A

—

A

or every 12 months

PROPELLER SHAFT

*Universal joints and sliding
sleeve grease

—

L

—

L

—

L

—

L

—

L

or every 12 months

Loose connections

I

I

I

I

I

I

I

I

I

I

or every 6 months

Splines for excessive wear

—

—

—

I

—

—

—

I

—

—

or every 24 months

Bearings and related parts for
looseness

—

—

—

I

—

—

—

I

—

—

or every 24 months

Center bearing

—

L

—

L

—

L

—

L

—

L

or every 12 months

REAR AXLE

*Differential gear oil

I

I

I

R

I

I

I

R

I

I

or every 24 months

FRONT AXLE

*Kingpins

L

L

L

L

L

L

L

L

L

L

or every 9 months

STEERING