2004 ISUZU TF SERIES belt

1-40 HEATER AND AIR CONDITIONING
COMPRESSOR
REMOVAL AND INSTALLATION (4J ENGINE)





852R300006
Removal Steps
1. Air duct
2. Magnetic clutch harness connector
3. Lock nut
4. Tension adjustment bolt
5. Drive belt
6. Refrigerant line
7. Bolt; compressor to bracket
8. Compressor assembly

Installation Steps
8. Compressor assembly

7. Bolt; compressor to bracket

6. Refrigerant line
5. Drive belt
4. Tension adjustment bolt
3. Lock nut
2. Magnetic clutch harness connector
1. Air duct

HEATER AND AIR CONDITIONING 1-41
Important Operations - Installation

7. Bolt; Compressor to Bracket
N
m (kgf
m/lb
ft)

Torque 44 (4.5/33)



6. Refrigerant Line
N
m (kgf
m/lb
ft)

Torque 11
19 (1.1/9.5
1.9/14)



Compressor Belt
Check the drive belt tension.
Depress the drive belt mid-portion with a 98N (10kg/22Ib)
force.
mm(in.)

Standard deflection 14~17 (0.55~0.67)

1-42 HEATER AND AIR CONDITIONING

REMOVAL AND INSTALLATION (6VE1)



RTW310MF000301

Removal Steps
1. Magnetic clutch harness connector
2. Compressor belt
3. Refrigerant line
4. Bolt; compressor to bracket
5. Compressor assembly

Installation Steps
5. Compressor assembly

4. Bolt; compressor to bracket

3. Refrigerant line

2. Compressor belt
1. Magnetic clutch harness connector

HEATER AND AIR CONDITIONING 1-43
Important Operations - Installation

4. Bolt; Compressor to Bracket
N
m (kgf
m/lb
ft)

Torque 19 (1.9/14)



3. Refrigerant Line
N
m (kgf
m/lb
ft)

Torque 11
19 (1.1/9.5
1.9/14)

RTW310MH000101

2. Compressor Belt
Move compressor belt tensioner to loose side using
wrench, then install serpentine belt to normal position.

1-44 HEATER AND AIR CONDITIONING

REMOVAL AND INSTALLATION (C24SE)

RTW310MF000401

Removal Steps
1. Magnetic clutch harness connector
2. Compressor belt
3. Refrigerant line
4. Bolt; compressor to bracket
5. Compressor assembly

Installation Steps
5. Compressor assembly

4. Bolt; compressor to bracket

3. Refrigerant line

2. Compressor belt
1. Magnetic clutch harness connector

HEATER AND AIR CONDITIONING 1-45
Important Operations - Installation

4. Bolt; Compressor to Bracket
N
m (kgf
m/lb
ft)

Torque 19 (1.9/14)



3. Refrigerant Line
N
m (kgf
m/lb
ft)

Torque 11
19 (1.1/9.5
1.9/14)



2. Compressor Belt
Move compressor belt tensioner to loose side using
wrench, then install serpentine belt to normal position.

HEATER AND AIR CONDITIONING 1-83

AIR CONDITIONING CYCLE TROUBLESHOOTING

TROUBLE POSSIBLE CAUSE CORRECTION
No cooling or
insufficient
cooling
1. Magnetic clutch does not run


Refer to “MAGNETIC CLUTCH”
troubleshooting in this section
2. Compressor is not rotating properly

Drive belt loosened or broken

Adjust the drive belt to the specified
tension or replace the drive belt


Magnetic clutch face is not clean and
slips
Clean the magnetic clutch face or replace




Incorrect clearance between magnetic
drive plate and pulley

Adjust the clearance (Refer to
“COMPRESSOR OVERHAUL”



Compressor oil leaks from shaft seal or
shell

Replace the compressor




Compressor seized

Replace the compressor

3. Insufficient or excessive charge of
refrigerant

Discharge and recover refrigerant.
Recharge to specified amount.
4. Leaks in the refrigerant system




Check refrigerant system for leaks and
repair as necessary
Discharge and recover refrigerant.
Recharge to specified amount.
5. Condenser clogged or insufficient radiation


Clean the condenser or replace as
necessary


Check radiator or condenser fan function

6. Temperature control link unit of the heater
unit defective

Repair the link unit

7. Unsteady operation due to foreign
substance in expansion valve

Replace the expansion valve

8. Poor operation of electronic thermostat


Check electronic thermostat and replace
as necessary
Insufficient
velocity
of cooling air

1. Evaporator clogged or frosted


Check evaporator core and replace or
clean the core
2. Air leaking from cooling unit or air duct

Check evaporator and duct connection,
then repair as necessary

3. Blower motor does not rotate prop-erly


Refer to “FAN CONTROL KNOB (FAN
SWITCH)” troubleshooting in this section

* For the execution of the charging and discharging operation in the table above, refer to the “RECOVERY,
RECYCLING, EVACUATING AND CHARGING” in this section.

POWER-ASSISTED STEERING SYSTEM 3B-7


Power Steering System Test
Test Procedure
F02RX002
Legend
(1) Bolt
(2) Hose
(3) Power Steering Unit
(4) Power Steering Pump


Test of fluid pressure in the power steering system is
performed to determine whether or not the oil pump and
power steering unit are functioning normally.
The power steering system test is used to identify and
isolate hydraulic circuit difficulties. Prior to performing
this test, the following inspections and corrections, i
f
necessary, must be made.


Inspect pump reservoir for proper fluid level.


Inspect pump belt for proper tension.


Inspect pump driver pulley condition.
1. Place a container under the pump to catch the fluid
when disconnecting or connecting the hoses.
2.
With the engine NOT running, disconnect the
pressure hose at the power steering pump and
install power steering tester 5-8840-0135-0 as
shown in the illustration. The gage must be between
the shutoff valve and pump. Open the shutoff valve.
3. Check the fluid level. Fill the reservoir with powe
r
steering fluid, to the "Full" mark. Start the engine,
then turn the steering wheel and momentarily hold it
against a stop (right or left). Turn the engine off and
check the connections at tester for leakage.
4. Bleed the system. Refer to Bleeding the Powe
r
Steering System in this section.
5. Start the engine and check the fluid level. Add
power steering fluid if required. When the engine is
at normal operating temperature, increase engine
speed to 1500 rpm.
CAUTION: Do not leave shutoff valve fully closed
for more than 5 seconds, as the pump could
become damaged internally.