1998 ISUZU TROOPER Service Repair Manual

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Page 137 of 3573

ISUZU TROOPER 1998 Service Repair Manual AIR CONDITIONING 1B Ð 11
13 12
11
10
8
732
91 1
5
4
6
Legend
(1) Liquid Line (High-Pressure Pipe)
(2) Pressure Switch
(3) Receiver Drier
(4) Discharge line (High-Pressure Hose)
(5) Suction Line (Low

Page 138 of 3573

ISUZU TROOPER 1998 Service Repair Manual 1B Ð 12 AIR CONDITIONING
Legend
(1) Liquid Line (High-Pressure Pipe)
(2) O-ring
(3) Compressor
(4) Discharge line (High-Pressure Hose)
(5) Pressure Switch
(6) Receiver Drier(7) Condenser Assembly
(8)

Page 139 of 3573

ISUZU TROOPER 1998 Service Repair Manual AIR CONDITIONING 1B Ð 13
ACR41) Using the ACR4(HFC-134a Refrigerant Recovery/
Recycling/ Recharging/ System) or equivalent to
thoroughly discharge and recover the refrigerant.
ACR
4(115V 60Hz) : 5-

Page 140 of 3573

ISUZU TROOPER 1998 Service Repair Manual 1B Ð 14 AIR CONDITIONING
REPAIR OF REFRIGERANT LEAKS
Refrigerant Line Connections
Install new O-rings, if required. When disconnecting or
connecting lines, use two wrenches to prevent the
connecting

Page 141 of 3573

ISUZU TROOPER 1998 Service Repair Manual AIR CONDITIONING 1B Ð 15
COMPRESSOR LEAKS
If leaks are located around the compressor shaft seal or
shell, replace or repair the compressor.
RECOVERY, RECYCLING, EVACUATION AND
CHARGING
Handling Refr

AIR CONDITIONING 1B Ð 15
COMPRESSOR LEAKS
If leaks are located around the compressor shaft seal or
shell, replace or repair the compressor.
RECOVERY, RECYCLING, EVACUATION AND
CHARGING
Handling Refrigerant-134a (HFC-134a)
Air conditioning systems contain HFC-134a.
This is a chemical mixture which requires special
handling procedures to avoid personal injury.
·Always wear safety goggles and protective gloves.
·Always work in a well-ventilated area. Do not weld or
steam clean on or near any vehicle-installed air
conditioning lines or components.
·If HFC-134a should come in contact with any part of
the body, flush the exposed area with cold water and
immediately seek medical help.
·If it is necessary to transport or carry any container of
HFC-134a in a vehicle, do not carry it in the passenger
compartment.
·If it is necessary to fill a small HFC-134a container
from a large one, never fill the container completely.
Space should always be allowed above the liquid for
expansion.
·Keep HFC-134a containers stored below 40 ¡C (104¡F).
LEAK AT REFRIGERANT LINE CONNECTIONS
1) Check the torque on the refrigerant line fitting and, if
too loose, tighten to the specified torque.
·Use two wrenches to prevent twisting and damage
to the Line.
·Do not over tighten.
2) Perform a leak test on the refrigerant line fitting.
3) If the leak is still present, discharge and recover the
refrigerant from the system.
4) Replace the O-rings.
·O-rings cannot be reused. Always replace with
new ones.
·Be sure to apply specified compressor oil to the
new O-rings.
5) Retighten the refrigerant line fitting to the specified
torque.
·Use two wrenches to prevent twisting and damage
to the line.
6) Evacuate, charge and retest the system.
LEAK IN THE HOSE
If the compressor inlet or outlet hose is leaking, the entire
hose must be replaced. Refrigerant hose must not be cut
or spliced for repair.
1) Locate the leak.
2) Discharge and recover the refrigerant.
3) Remove the hose assembly.
·Cap the open connections at once.
4) Connect the new hose assembly.
·Use two wrenches to prevent twisting or damage
to the hose fitting.
·Tighten the hose fitting to the specified torque.
5) Evacuate, charge and test the system.

Page 142 of 3573

ISUZU TROOPER 1998 Service Repair Manual 1B Ð 16 AIR CONDITIONING
WARNING
·SHOULD HFC-134a CONTACT YOUR EYE(S),
CONSULT A DOCTOR IMMEDIATELY.
·DO NOT RUB THE AFFECTED EYE(S). INSTEAD,
SPLASH QUANTITIES OF FRESH COLD WATER
OVER THE AFFECTE

Page 143 of 3573

ISUZU TROOPER 1998 Service Repair Manual AIR CONDITIONING 1B Ð 17
7) Check to ensure that the pressure does not change
after 10 minutes or more.
·If the pressure changes, check the system for leaks.
·If leaks occur, retighten the refrige

Page 144 of 3573

ISUZU TROOPER 1998 Service Repair Manual 1B Ð 18 AIR CONDITIONING
CHARGING THE REFRIGERANT SYSTEM
There are various methods of charging refrigerant into the
air conditioning system.
These include using ACR
4(HFC-134a Refrigerant
Recovery/ R

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