Isuzu N-Series. Manual - part 42

0B-46 MAINTENANCE AND LUBRICATION

NKR77 and NPR77 (Front Rigid Suspension) Models (For Europe)

W : Wheel bearing grease

C : Multipurpose type grease

M : MoS

2

 contained type grease

B : Brake fluid

A : Automatic transmission fluid

E : Engine oil

G : Gear oil

     : Change

     : Check and Replenish or Lubricate

W

B

E

E

G

C

M

C

M

Differential gear

Rear hub bearing

Engine [B3]

Engine [B2]

W

Prop. shaft center bearing [B3]

Prop. shaft center bearing [B2]

Every 9 months or 15,000 km (9,000 miles)

Every 12 months or 20,000 km (12,000 miles)

Every 18 months or 30,000 km (18,000 miles)

Every 3 years or 60,000km (36,000 miles)

W

W

C

M

M

M

M

M

M

M

M

King pin [B3]

C

King pin [B2]

Prop. shaft universal joint [B3]

Front hub bearing

Prop. shaft sliding sleeve [B2]

Transmission

Rear hub bearing

Prop. shaft universal joint [B2]

Prop. shaft universal joint [B3]

Power steering fluid

Prop. shaft universal joint [B2]

Prop. shaft universal joint [B2]

Prop. shaft sliding sleeve [B3]

Prop. shaft universal joint [B3]

E

King pin [B3]

King pin [B2]

Brake and clutch fluid

Front hub bearing

[B2]: ACEA B2 spec.
        engine oil model
[B3]: ACEA B3 or more spec.
        engine oil model

A

N0A0025E

MAINTENANCE AND LUBRICATION 0B-47

NKR77 (Front Independent Suspension) Model (For Europe)

W : Wheel bearing grease

C : Multipurpose type grease

M : MoS

2

 contained type grease

B : Brake fluid

A : Automatic transmission fluid

E : Engine oil

G : Gear oil

     : Change

     : Check and Replenish or Lubricate

Differential gear

Rear hub bearing

Engine [B3]

Engine [B2]

Prop. shaft center bearing [B3]

Prop. shaft center bearing [B2]

King pin [B3]

King pin [B2]

Prop. shaft universal joint [B3]

Front hub bearing

Prop. shaft sliding sleeve [B2]

Transmission

Rear hub bearing

Prop. shaft universal joint [B2]

Prop. shaft universal joint [B3]

Power steering fluid

Prop. shaft universal joint [B2]

Prop. shaft universal joint [B2]

Prop. shaft sliding sleeve [B3]

Prop. shaft universal joint [B3]

A

W

W

W

B

E

E

G

C

C

M

M

M

M

M

M

M

M

M

C

M

C

Upper link [B3]

Upper link [B2]

Brake and clutch fluid

Front hub bearing

W

E

Every 9 months or 15,000 km (9,000 miles)

Every 12 months or 20,000 km (12,000 miles)

Every 18 months or 30,000 km (18,000 miles)

Every 3 years or 60,000km (36,000 miles)

[B2]: ACEA B2 spec.
        engine oil model
[B3]: ACEA B3 or more spec.
        engine oil model

N0A0026E

SERVICE INFORMATION 00-1

HEATING AND AIR CONDITIONING

SECTION 00

SERVICE INFORMATION

Contents

TROUBLESHOOTING .......................................... 00-2

Heating Cycle Troubleshooting ......................... 00-2
Fan Switch Troubleshooting .............................. 00-3
Air Conditioning Cycle Troubleshooting .......... 00-15
Magnetic Clutch Troubleshooting .................... 00-19
Compressor Troubleshooting .......................... 00-28
Individual Inspection ........................................ 00-29

MAIN DATA AND SPECIFICATIONS ................. 00-32
FIXING TORQUE................................................ 00-34

Refrigerant Line Fixing Torque (Except 4HK1-TC En-
gine Model For Australia) ................................ 00-34
Refrigerant Line Fixing Torque (4HK1-TC Engine 
Model For Australia) ........................................ 00-35
Drive Plate / Field Coil Fixing Torque .............. 00-36

SPECIAL TOOLS................................................ 00-37

00-2 SERVICE INFORMATION

TROUBLESHOOTING

Heating Cycle Troubleshooting

TROUBLE

POSSIBLE CAUSE

CORRECTION

No heating or Insufficient 
heating.

1. BIower motor does not run, or runs 

improperly.

• Refer to “Fan Switch Troubleshooting”.
• Check the engine coolant temperature 

after warming up the engine and check 
the thermostat. Replace as necessary.

• Add engine coolant as required.
• Check if the water hose to the heater 

core is clogged, collapsed or twisted.
Repair or replace as necessary.

• Check water pump function. Repair or 

replace as necessary.

• Clean or replace as necessary.

2. Engine coolant temperature is low.

3. Insufficient engine coolant.

4. Circulation volume of engine cool-

ant is insufficient.

5. Heater core clogged or collapsed.

• Repair the temperature control link unit 

or mode doors.

• Repair or adjust the control cables.
• Repair or replace as necessary.

6. The heater core is not provided with 

air sent from the blower motor.

7. Duct connections defective or un-

sealing.

Control knob moves but 
mode door does not oper-
ate.

1. Cable attaching clip is not correct.

• Repair.

2. Link unit of heater unit or blower as-

sembly defective.

• Repair.

The mode door cannot be 
set to the mode selected.

1. Link unit of heater unit or blower as-

sembly defective.

• Repair.

2. Control cable is not adjusted.

• Adjust.