1998 ISUZU TROOPER check oil

1D Ð 4 COMPRESSOR OVERHAUL
COMPRESSOR OIL
OIL SPECIFICATION
·The HFC-134a system requires a synthetic
(PAG) compressor oil.
·Compressor (PAG) oil varies according to
compressor model. Be sure to use oil specified
for the model of compressor.
DKV-14D : ZXL-200PG
(ISUZU PART NO.
8-97101-336-0)
DKS-15CH : ZXL-100PG
(ISUZU PART NO.
8-97101-338-0)
HANDLING OF OIL
·The oil should be free from moisture, dust,
metal powder, etc.
·Do not mix with other oil
·The water content in the oil increases when
exposed to the air. After use, seal oil from air
immediately.
·The compressor oil must be stored in steel
containers, not in plastic containers.
COMPRESSOR OIL CHECK
The oil used to lubricate the compressor is
circulating with the refrigerant.
Whenever replacing any component of the system
or a large amount of gas leakage occurs, add oil to
maintain the original amount of oil.
Oil Capacity
Capacity total in system 150cc (4.2 Imp fl oz)
Compressor (Service
150cc (4.2 Imp fl oz)
parts) charging amount
Checking and Adjusting for Used Compressor
1) Perform Oil return operation.
(Refer to ÒOil Return OperationÓ in this section.)
2) Discharge refrigerant and remove the
compressor.
3) Drain the compressor oil and measure the
extracted oil with a measuring cylinder.
4) If the amount of oil drained is much less than
90cc (2.5 Imp fl oz), some refrigerant may have
leaked out. Conduct leak tests on connections
of each system, and if necessary, repair or
replace faulty parts.5) Check the compressor oil for contamination.
(Refer to ÒContamination of Compressor OilÓ in
this section.)
6) Adjust oil level following the procedure below.
Collected Amount Charging Amount
same as collected
more than 90cc (2.5 Imp fl oz)
amount
less than 90cc (2.5 Imp fl oz) 90cc (2.5 Imp fl oz)
7) Install the compressor, then evacuate, charge
and perform oil return operation.
8) Check system operation.
When it is impossible to perform oil return
operation, the compressor oil should be checked in
the following order:
1) Discharge refrigerant and remove the
compressor.
2) Drain the compressor oil and measure the
extracted oil with a measuring cylinder.
3) Check the oil for contamination.
4) If more than 90cc (2.5 Imp fl oz) of oil is
extracted from the compressor, supply same
amount of oil to the compressor to be installed.
If the amount of oil extracted is less than 90cc
(2.5 Imp fl oz), recheck the compressor oil in the
following order:
5) Supply 90cc (2.5 Imp fl oz) of oil to the
compressor and install it onto the vehicle.
6) Perform oil return operation.
7) Remove the compressor and recheck the
amount of oil.
8) Adjust the compressor oil, if necessary.
Collected Amount Charging Amount
same as collected
more than 90cc (2.5 Imp fl oz)
amount
less than 90cc (2.5 Imp fl oz) 90cc (2.5 Imp fl oz)
GENERAL INFORMATION
871RX020

COMPRESSOR OVERHAUL 1D Ð 5
Checking and Adjusting for Compressor
Replacement
150cc (4.2 Imp fl oz) of oil is charged in compressor
(service parts). So it is necessary to drain the proper
amount of oil from the new compressor.
1) Perform oil return operation.
2) Discharge refrigerant and remove the
compressor.
3) Drain the compressor oil and measure the
extracted oil.
4) Check the compressor oil for contamination.
5) Adjust oil level as required.
Amount of oil drained Draining amount of oil
from used compressor from new compressor
less than Same as drained
90cc (2.5 Imp fl oz) amount
more than
90cc (2.5 Imp fl oz)
90cc (2.5 Imp fl oz)
6) Evacuate, charge and perform oil return
operation.
7) Check system operation.
CONTAMINATION OF COMPRESSOR OIL
Unlike engine oil, no cleaning agent is added to the
compressor oil. Even if the compressor runs for a
long period of time (approximately 1 season), the
oil never becomes contaminated as long as there is
nothing wrong with the compressor or its method
of use.
Inspect the extracted oil for any of the following
conditions:
·The capacity of the oil has increased.
·The oil has changed color to red.
·Foreign substances, metal powder, etc., are
present in the oil.
If any of these conditions exists, compressor oil is
contaminated. Whenever contaminated
compressor oil is discovered, the receiver/drier
must be replaced.
OIL RETURN OPERATION
There is close affinity between the oil and the
refrigerant. During normal operation, part of the oil
recirculates with the refrigerant in the system.
When checking the amount of oil in the system, or
replacing any component of the system, the
compressor must be run in advance for oil return
operation. The procedure is as follows:
1) Open the all doors and engine hood.
2) Start the engine and A/C switch is ÒONÓ and
Set the fan control knob at its highest position.
3) Run the compressor for more than 20 minutes
between 800 and 1,000 rpm in order to operate
the system.
4) Stop the engine.
REPLACEMENT OF COMPONENT PARTS
When replacing system component parts, supply
the following amount of oil to the component parts
to be installed.
Component parts to be installed Amount of oil
Evaporator 50cc (1.4 Imp fl oz)
Condenser 30cc (0.8 Imp fl oz)
Receiver/drier 30cc (0.8 Imp fl oz)
871RX013

1D Ð 8 COMPRESSOR OVERHAUL
Inspection and Repair
Drive Plate
If the frictional surface shows signs of damage due to
excessive heat, the drive plate and pulley should be
replaced.
Pulley Assembly
Check the appearance of the pulley assembly. If the
frictional surface of the pulley shows signs of excessive
grooving due to slippage, both the pulley and drive
plate should be replaced. The frictional surfaces of the
pulley assembly should be cleaned with a suitable
solvent before reinstallation.
Coil
Check coil for loose connector or cracked insulation.
Installation
1. Install field coil.
·Align the located portion (1) of the field coil and
compressor.
·Tighten the mounting screw to the specified torque.
Torque: 5Nám (44 lb in)
2. Connect the lead wire connector with the rubber
hold and tighten the screw.3. Install pulley assembly by using pulley installer
J-33940-A (2) and drive handle J-8092 (1).
4. Install snap ring.
5. Install shim(s).
6. Install the drive plate to the compressor drive shaft
together with the original shim(s)(1). Press the drive
plate by hand.
1
2
871RX032
1
871RX010
1
871RX015

COMPRESSOR OVERHAUL 1D Ð 23
7. Remove and discard the seal seat O-ring (2) from the
compressor neck using O-ring remover J-9553-01.
8. Recheck the shaft and inside of the compressor
neck for dirt or foreign material and be sure these
areas are perfectly clean before installing new parts.
Cleaning
Thoroughly clean O-ring seal groove in front head.
CAUTION: Seals should not be re-used. Always use
a new specification service seal on rebuild. Be sure
that the seal to be installed is not scratched or
damaged in anyway. Make sure that the seal seat
and seal are free of lint and dirt that could damage
the seal surface or prevent sealing.
Installation
1. Dip the new seal seat O-ring (1) in clean 525
viscosity refrigerant oil and assemble onto O-ring
installer J-33011.2. Insert the O-ring installer J-33011 into the
compressor neck until the installer "bottoms". Lower
the moveable slide of the O-ring installer to release
the O-ring into the seal O-ring lower groove (The
compressor neck top groove is for the shaft seal
retainer ring.) Rotate the installer to seat the O-ring
and remove the installer.
3. Dip the new seal in clean 525 viscosity refrigerant oil
and assemble seal to Seal Installer J-23128-A, by
turning handle clockwise. The stamped steel case
side of the lip seal must be engaged with knurled
tangs of installer so that flared-out side of lip seal is
facing and installed towards the compressor. Install
seal protector J-34614, in the seal lip and place over
the compressor shaft, and push the seal in place with
a rotary motion or place the seal protector J-34614
over end of compressor shaft, and slide the new seal
onto the shaft with a rotary motion until it stops. Take
care not to dislodge the O-ring. Be sure the seal (2)
makes good contact with the O-ring. Disengage the
installer from the seal and remove the installer
J-23128-A and the seal protector J-34614.
CAUTION: Handling and care of seal protector is
important. If seal protector is nicked or the bottom
flared, the new seal may be damaged during
installation.
4. Install the new seal retainer ring with its flat side
against the Seal, using Snap-Ring Pliers. Use the
sleeve from O-ring installer J-33011 to press in on
the seal retainer ring so that it snaps into its groove.
5. To leak test, install compressor leak test fixture
J-39893 on rear head of compressor and connect
gage charging lines and Refrigerant Recovery
System. Pressurize suction and high-side of
compressor with R-134a Refrigerant. Temporarily
install (M9 ´1.25 thread on shaft) nut and, with the
compressor in horizontal position, rotate the
compressor shaft in normal direction of rotation
several times by hand. Leak test the seal area and
correct and leak found. Recover the refrigerant.
Remove shaft nut.
2 J-9553-01
901RW009
1
J-33011
901RW010
J-34614
2
J-23128-A
901RW011

1D Ð 24 COMPRESSOR OVERHAUL
6. Remove any excess oil resulting from installing the
new seal parts from the shaft and inside the
compressor neck.
7. Install the clutch plate and hub assembly as
described previously.8. Reinstall compressor belt and tighten bracket.
9. Evacuate and charge the refrigerant system.
COMPRESSOR PRESSURE RELIEF VALVE
Removal
1. Recover the refrigerant using Refrigerant Recovery
System.
2. Remove old pressure relief valve.
Installation
1. Clean valve seat area on rear head.2. Lubricate O-ring of new pressure relief valve and
O-ring assembly with new 525 viscosity refrigerant
oil. Install new valve and torque in place, 9.0 Nám
(6.1 ft lbs)
3. Evacuate and recharge the system.
4. Leak test system.
COMPRESSOR OIL
Compressor Oil Check
The oil used to lubricate the compressor is circulating
with the refrigerant.
Whenever replacing any component of the system or a
large amount of gas leakage occurs, add oil to maintain
the original amount of oil.
Checking and Adjusting Oil Quantity for
Used Compressor
1. Perform oil return operation. Refer to Oil Return
Operation in this section.
2. Discharge and recover refrigerant and remove the
compressor.
3. Drain the compressor oil and measure the extracted
oil with a measuring cylinder.
4. If the amount of oil drained is much less than 90 cc
(3.0 fl. oz.), some refrigerant may have leaked out.
Conduct a leak tests on the connections of each
system, and if necessary, repair or replace faulty
parts.
5. Check the compressor oil contamination. (Refer to
Contamination of Compressor Oil in this section.)
6. Adjust the oil level following the next procedure
below.7. Install the compressor, then evacuate, charge and
perform the oil return operation.
8. Check system operation.
When it is impossible to preform oil return
operation, the compressor oil should be checked in
the following order:
1. Discharge and recover refrigerant and remove the
compressor.
2. Drain the compressor oil and measure the extracted
oil with a measuring cylinder.
3. Check the oil for contamination.
4. If more than 90 cc (3.0 fl. oz.) of oil is extracted from
the compressor, supply the same amount of oil to
the compressor to be installed. If the amount of oil
extracted is less than 90 cc (3.0 fl. oz.), recheck the
compressor oil in the following order:
5. Supply 90 cc (3.0 fl. oz.) of oil to the compressor
and install it onto the vehicle.
6. Evacuate and recharge with the proper amount of
refrigerant.
7. Perform the oil return operation.
8. Remove the compressor and recheck the amount of
oil.
9. Adjust the compressor oil, if necessary.
Checking and Adjusting for Compressor
Replacement
The oil is not charged in compressor (service parts). So
it is necessary to charge the proper amount of oil to the
new compressor. (Oil Capacity)
Capacity total in system 150 cc (5.0 fl.oz)
Compressor (Service 150 cc (5.0 fl.oz)
parts) charging amount
(Collected Amount) (Charging Amount)
more than 90 cc same as collected
(3.0 fl.oz) amount
less than 90 cc (3.0 fl.oz) 90 cc (3.0 fl.oz)
(Collected Amount) (Charging Amount)
more than 90 cc same as collected
(3.0 fl.oz) amount
less than 90 cc (3.0 fl.oz) 90 cc (3.0 fl.oz)

COMPRESSOR OVERHAUL 1D Ð 25
1. Perform oil return operation.
2. Discharge and recover the refrigerant and remove
the compressor.
3. Drain the compressor oil and measure the extracted
oil.
4. Check the compressor oil for contamination.
5. Adjust the oil level as required.
6. Evacuate, charge and perform the oil return
operation.
7. Check the system operation.
Contamination of Compressor Oil
Unlike engine oil, no cleaning agent is added to the
compressor oil. Even if the compressor runs for a long
period of time (approximately one season), the oil never
becomes contaminated as long as there is nothing
wrong with the compressor or its method of use.
Inspect the extracted oil for any of the following
conditions:
·The capacity of the oil has increased.
·The oil has changed to red.
·Foreign substances, metal powder, etc., are present
in the oil.
If any of these conditions exists, the compressor
oil is contaminated. Whenever contaminated
compressor oil is discovered, the receiver/drier
must be replaced.
Oil Return Operation
There is close affinity between the oil and the
refrigerant. During normal operation, part of the oil
recirculates with the refrigerant in the system. When
checking the amount of oil in the system, or replacing
any component of the system, the compressor must be
run in advance for oil return operation. The procedure
is as follows:
1. Open all the doors and the engine hood.
2. Start the engine and air conditioning switch to "ON"
and set the fan control knob at its highest position.
3. Run the compressor for more than 20 minutes
between 800 and 1,000 rpm in order to operate the
system.
4. Stop the engine.
Replacement of Component Parts
When replacing the system component parts, supply
the following amount of oil to the component parts to be
installed.
Compressor Leak Testing (External and
Internal)
Bench-Check Procedure
1. Install test plate J-39893 on rear head of compressor.
2. Using Refrigerant Recovery System, attach center
hose of manifold gage set on charging station to a
refrigerant drum standing in an upright drum.
3. Connect charging station high and low pressure
lines to corresponding fittings on test plate J-39893.
Suction port (low-side) of compressor has large
internal opening. Discharge port (high-side) has
smaller internal opening into compressor and
deeper recess.
4. Open low pressure control, high pressure control
and refrigerant control on charging station to allow
refrigerant vapor to flow into compressor.
5. Using a leak detector, check for leaks at pressure
relief valve, rear head switch location, compressor
front and rear head seals, center cylinder seal,
through bolt head gaskets and compressor shaft
seal. After checking, shut off low pressure control
and high-pressure control on charging station.
6. If an external leak is present, perform the necessary
corrective measures and recheck for leaks to make
certain the leak has been connected.
7. Recover the refrigerant.
8. Disconnect both hoses from the test plate J-39893.
9. Add 90 ml (3 oz.) new PAG lubricant to the
compressor assembly. Rotate the complete
compressor assembly (not the crankshaft or drive
plate hub) slowly several turns to distribute oil to all
cylinder and piston areas.
10. Install a M9 ´1.25 threaded nut on the compressor
crankshaft if the drive plate and clutch assembly are
not installed.
11. Using a box-end wrench or socket and handle,
rotate the compressor crankshaft or clutch drive
plate on the crankshaft several turns to insure
piston assembly to cylinder wall lubrication.
12. Using Refrigerant Recovery System, connect the
charging station high-pressure line to the test plate
J-39893 high-side connector.
13. Using Refrigerant Recovery System, connect the
charging station low-pressure line to the low
pressure port of the test plate J-39893. Oil will drain
out of the compressor suction port if the compressor
is positioned with the suction port downward. (Component parts to be (Amount of Oil)
installed)
Evaporator 50 cc (1.7 fl. oz.)
Condenser 30 cc (1.0 fl. oz.)
Receiver/dryer 30 cc (1.0 fl. oz.)
Refrigerant line (one 10 cc (0.3 fl. oz.)
piece)
(Amount of oil drained (Charging amount of oil
from used compressor) to new compressor)
more than 90 cc same as drained amount
(3.0 fl.oz)
less than 90 cc (3.0 fl.oz) 90 cc (3.0 fl.oz)

1D Ð 26 COMPRESSOR OVERHAUL
14. Attach the compressor to the J-34992 holding
fixture and mount the compressor in a vise so that
the compressor will be in a horizontal position and
the shaft can be turned with a wrench.
15. Using a wrench, rotate the compressor crankshaft
or drive plate hub ten complete revolutions at a
speed of approximately one-revolution per second
turning the compressor at less than one-revolution
per second can result in a lower pump-up pressure
and disqualify a good pumping compressor.
16. Observe the reading on high-pressure gauge at the
completion of the tenth revolution of the
compressor. The pressure reading for a good
pumping compressor should be 690 kPa (100 psi)
or above. A pressure reading of less than 620 kPa
(90 psi) would indicate one or more suction and/or
discharge valves leaking an internal leak, or an
inoperative valve, and the refrigerant must be
recovered and the compressor disassembled and
checked for cause of leak. Repair as needed,
reassemble and repeat the pump-up test. Externally
leak test.
17. When the pressure pump-up test is completed,
recover the refrigerant from the high-side and
remove the test plate J-39893.
18. Tilt the compressor so that the compressor suction
and discharge ports are down. Drain the PAG
lubricant from the compressor.
19. Allow the compressor to drain for 10 minutes, then
refill with the proper amount of PAG lubricant, per
oil balance procedure described previously. The
PAG lubricant may be poured into the suction port.
If further assembly or processing is required, a
shipping plate or test plate J-39893 should be
installed to keep out air, dirt and moisture until the
compressor is installed.

SERVICE INFORMATION 00 – 13
STEERING
INSPECTION
Visual check
Check the following parts:
• Oil leakage.
• Steering system for looseness or damage.
• Steering function
• Joint ball for oil leakage or damage.
• Joint ball rubber boot for damage.
MAINTENANCE
The hydraulic system should be kept clean and fluid level
in the reservoir should be checked at regular intervals and
fluid added when required. Refer to "MAINTENANCE AND
LUBRICATION" in section 0B of the manual for type of
fluid to be used and intervals for filling.
If the system contains some dirt, flush it as detailed later
in this section. If it is exceptionally dirty, both the pump
and the gear must be completely disassembled before
further usage.
All tubes, hoses, and fittings should be inspected for
leakage at regular intervals. Fittings must be tight. Make
sure the clips, clamps and supporting tubes and hoses are
in place and properly secured.
Power steering hoses and lines must not be twisted,
kinked or tightly bent. Air in the system will cause spongy
action and noisy operation. When a hose is disconnected
or when fluid is lost, for any reason, the system must be
bled after refilling. Refer to "Bleeding the Power Steering
System" in this section.
FLUID LEVEL
1. Run the engine until the power steering fluid reaches
normal operating temperature, about 55°C (130°F),
then shut the engine off.
2. Check the level of fluid in the reservoir.
3. If the fluid level is low, add power steering fluid as
specified in "MAINTENANCE AND LUBRICATION" in
section 0B to the proper level and install the receiver
cap.
4. When checking the fluid level after the steering
system has been serviced, air must be bled from the
system. Refer to "Bleeding the Power Steering
System" in this section.
SERVICING