2004 ISUZU TF SERIES lock

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 1-75
Important Operation - Removal
1. Control lever assembly
Refer to “CONTROL LEVER ASSEMBLY” in this section.

2. Illumination Bulb
To remove the illumination bulb, insert an ordinary screwdriver
into the slot (B) at the back of the bulb. Turn the bulb
counterclockwise and pull it free.

1-86 HEATER AND AIR CONDITIONING

RESULT SYMPTOM TROUBLE CAUSE CORRECTION
Suction
(Low)
pres-sure
abnormally
low
Condenser is not hot and
excessive bubble in sight glass







Insufficient refrigerant








Check sight
glass.(See “Reading
Sight Glass”)


Check for leaks


Discharge and
recover refrigerant.
Recharge to specified
amount
Frost on the expansion valve inlet
line

Expansion valve clogged


Replace the
expansion valve

A distinct difference in
temperature between the inlet and
outlet refrigerant lines of the
receiver/drier

Receiver/drier clogged




Replace the receiver/
drier


Expansion valve outlet refrigerant
line is not cold and low-pressure
gauge indicates vacuum



The temperature sensor of
the expansion valve is
defective, and the valve
cannot regulate the correct
flow of the refrigerant

Replace the
expansion valve



Discharge temperature is low and
air flow from vents is restricted

Frozen evaporator core fins


Check electronic
thermostat and
replace as necessary
Low-pressure gauge reading is
low, or a vacuum reading may be
shown

Clogged or blocked
refrigerant line


Replace refrigerant
line
Suction
(Low) and
Discharge
(High)
pressure
abnor-
mally
high
No bubbles in sight glass after
condenser is cooled by water
(Insufficient cooling)





Excessive refrigerant in
system






Check sight
glass.(See “Reading
Sight Glass”)


Discharge and
recover refrigerant.
Recharge to specified
amount
Reduce air flow through con-
denser


Condenser clogged

Radiator (condenser) fan
does not rotate properly

Clean

Check cooling fan
operation
Suction (Low) pressure hose is
not cold

Air in system

Evacuate and charge
refrigerant
Suction
(Low) and
Discharge
(High)
pres-sure
abnor-
mally
low
Insufficient cooling and excessive
bubbles in the sight glass

Insufficient refrigerant in
system


Check sight glass.
(See “Reading Sight
Glass”)


Check for leaks

Discharge and
recover refrigerant.
Recharge to specified
amount

MSG MODEL 7B-3
GENERAL DESCRIPTION


The MSG type transmission is fully synchronized 5-speed unit with blocking ring type synchronizers and a constant
mesh type reverse gear.
The unit consists principally of a case with an integral clutch housing, intermediate plate, rear cover and gears.
The top of the rear cover is a quadrant box containing the transmission control mechanism.
The case and rear cover are cast aluminum alloy to reduce weight.

MSG MODEL 7B-15
DISASSEMBLY
MAJOR COMPONENTS




RTW47BLF000301

Disassembly Steps
1. Clutch shift block and release bearing
2. Clutch shift fork
3. Speedometer sensor
4. Speedometer driven gear assembly
5. Gear control box assembly


6. Front cover with oil seal



7. Counter gear snap ring


8. Bearing snap ring
9. Rear cover with oil seal
10. Transmission case
11. Intermediate plate with gear assembly

MSG MODEL 7B-17
MAJOR COMPONENT

INTERNAL PARTS




Disassembly steps
1. Detent assembly
2. Shift fork assembly & interlock pin
3. Rev. and 5th gear assembly

4. Counter gear shaft assembly
5. Top & main gear shaft assembly

7B-18 MSG MODEL
MINOR COMPONENTS

DETENT, SHIFT ARM ASSEMBLY AND INTERLOCK PIN


Disassembly Steps
1. Detent spring plate and gasket
2. Detent spring


3. Detent ball
4. Rev. - 5th shaft rod
5. Rev. - 5th shaft arm
6. 1st - 2nd shift rod



7. 3rd - 4th shift rod


8. 3rd - 4th shift arm


9. 1st - 2nd shift arm
10. Interlock pin
11. Intermediate plate and gear assembly

MSG MODEL 7B-19


Important Operations
3. Detent Ball




7. 3rd - 4th Shift Rod
8. 3rd - 4th Shift Arm
9. 1st - 2nd Shift Arm
1) Hold a round bar against the shift arm end.
This will prevent damage to other components.





2) Use a spring pin remover to remove the shift arm spring pin
from the shift arm and the shift rod.
Spring Pin Remover : 9-8529-2201-0
Discard the used spring pin.
3) Move the 3rd - 4th shift rod forward.
Take care not to lose the interlock pins.