oil type ISUZU TROOPER 1998 Service Repair Manual

GENERAL INFORMATION 0AÐ5
7. In this manual, the following action symbols
are used to indicate the type of service
operations to be performed.
. . . Remove or disconnect . . . Adjust
. . . Install or connect . . . Clean
. . . Disassemble . . . Pay close attention - Important
. . . Reassemble . . . Tighten to specified torque
. . . Align the marks . . . Use special tool(s)
. . . Correct direction . . . Lubricate with oil
. . . Inspect . . . Lubricate with grease
. . . Take measurement . . . Use liquid gasket
8. The service standard is indicated in terms of
ÒStandardÓ and ÒLimitÓ.
The ÒStandardÓ means the assembly standard
and standard range within which the parts areconsidered serviceable.
ÒLimitÓ indicates the limit value (Correction or
replacement is necessary when measurement
is beyond this limit.)

MAINTENANCE AND LUBRICATION 0BÐ7
RECOMMENDED FLUIDS, LUBRICANTS
AND FUELS
In order to obtain maximum performance and longest service life from your ISUZU vehicles, it is very
important to select and use correctly best lubricants and diesel fuels.
When lubricating, be sure to use ISUZU genuine lubricants or recommended lubricants listed below,
according to the maintenance schedule for each vehicle model.
The lubrication intervals in the maintenance schedule and the coverage and period of new vehicle warranty
are based on the use of ISUZU genuine lubricants or recommended lubricants as given in the chart which
will serve as a guide for selecting lubricants of proper brand name.
LUBRICATION MAKE BRAND / TYPEGRADE
API ACEA
ISUZU GENUINE BESCO MULTI Ð Z TYPE CE (10W-30) CE
ISUZU GENUINE BESCO MULTI Ð Z (10W-30) CD
ISUZU GENUINE BESCO MULTI Ð Z SUV (5W-30) CD
ISUZU GENUINE BESCO S Ð 3 (10W, 20W, 30, 40) CD
Diesel engine crankcase EXXON / ESSO ESSOLUBE XD-3+ (15W-40) CG4/CF E2/B2
EXXON / ESSO ESSOLUBE XT331 (15W-40) CG-4/CF E2/B2
MOBIL DELVAC HP (15W-40, 20, 30, 40) CF/CE
CALTEX / CHEVRONDELO CXJ (15W-40, 30, 40) CF
SHELL RIMURA D (15W-40, 30, 40 CD/CF
ELF PERFORMANCE TROPHY (15W-40) CE E3
TOTAL RUBIA XT (15W-40) CF-4 E2
ISUZU GENUINE BESCO RACING ACE (7.5W-30) SG
ISUZU GENUINE BESCO MULTI ACE (7.5W-30) SF
ISUZU GENUINE BESCO ACE (10W-30) SE
EXXON / ESSO ESSO SUPERFLO (15W-40, 15W-50, 20W-50) SJ A2
Gasoline engine EXXON / ESSO ESSO UNIFLO (15W-40, 15W-50, 20W-50) SJ A2
crankcase MOBIL MOBIL SUPER XHP
(15W-40, 15W-50, 20W-50)SJ A3
CALTEX / TEXACOHAVOLINE FORMULA-3 (15W-40, 20W-50) SJ
SHELL HELIX SUPER (10W-30) SJ
ELF SUPER SPORTI S (15W-40) SG
TOTAL QUARTZ 5000 (15W-40, 20W-50) SJ A2
ISUZU GENUINE BESCO GEAR OIL TRANSAXLE (5W-30) SG
EXXON / ESSO ESSOLUBE XD-3+ (15W-40) CG-4/CF E2/B2
EXXON / ESSO ESSOLUBE XT331 (15W-40) CG-4/CF E2/B2
Manual transmission MOBIL MOBIL SUPER (10W-30) SH
Transfer caseCALTEX / TEXACOHAVOLINE FORMULA-3 (15W-40, 20W-50) SH
SHELL RIMURA D (15W-40) CD/CF
ELF SUPER SPORTI S (15W-40) SG/CD
TOTAL QUARTZ 5000 (15W-40, 20W-50) SJ/CF A2/B2
ISUZU GENUINE BESCO GEAR OIL SH (80W-90, 90, 140) GL-5
ISUZU GENUINE BESCO SHIFT ON THE FLY (75W-90) GL-5
DifferentialEXXON / ESSO GEAR OIL GX (85W-90) GL-5
Shift on the fly systemMOBIL MOBILUBE HD (80W-90, 85W-140) GL-5
(GL-5 only)CALTEX THURBAN GL-5 EP (80W-90, 85W-140) GL-5
SHELL SPIRAX HD (90, 140) GL-5
ELF TRANSELF TYPE B (80W-90, 85W-140) GL-5
TOTAL TRANSMISSION TM (80W-90, 85W-140) GL-5
ISUZU GENUINE BESCO GEAR OIL LSD (140) GL-5
EXXON / ESSO GEAR OIL LSA (90) GL-5
Differential MOBIL MOBILUBE HD LS (80W-90) GL-5
(Limited Slip Differential) CALTEX GEAR OIL LSD (90) GL-5
ELF TRANSELF TYPE BLS (90) GL-5
TOTAL TRANSMISSION DA (85W-90) GL-5

1B Ð 4 AIR CONDITIONING
The refrigeration cycle includes the following four
processes as the refrigerant changes repeatedly
from liquid to gas and back to liquid while
circulating.
EVAPORATION
The refrigerant is changed from a liquid to a gas
inside the evaporator. The refrigerant mist that
enters the evaporator vaporizes readily. The liquid
refrigerant removes the required quantity of heat
(latent heat of vaporization) from the air around the
evaporator core cooling fins and rapidly vaporizes.
Removing the heat cools the air, which is then
radiated from the fins and lowers the temperature
of the air inside the vehicle.
The refrigerant liquid sent from the expansion valve
and the vaporized refrigerant gas are both present
inside the evaporator and the liquid is converted to
gas.
With this change from liquid to gas, the pressure
inside the evaporator must be kept low enough for
vaporization to occur at a lower temperature.
Because of that, the vaporized refrigerant is sucked
into the compressor.
COMPRESSION
The refrigerant is compressed by the compressor
until it is easily liquefied at normal temperature.
The vaporized refrigerant in the evaporator is
sucked into the compressor. This action maintains
the refrigerant inside the evaporator at a low
pressure so that it can easily vaporize, even at low
temperatures close to 0¡C (32¡F).
Also, the refrigerant sucked into the compressor is
compressed inside the cylinder to increase the
pressure and temperature to values such that the
refrigerant can easily liquefy at normal ambient
temperatures.
CONDENSATION
The refrigerant inside the condenser is cooled by
the outside air and changes from gas to liquid.
The high temperature, high pressure gas coming
from the compressor is cooled and liquefied by the
condenser with outside air and accumulated in the
receiver/drier. The heat radiated to the outside air
by the high temperature, high pressure gas in the
compressor is called heat of condensation. This is
the total quantity of heat (heat of vaporization) the
refrigerant removes from the vehicle interior via the
evaporator and the work (calculated as the quantity
of heat) performed for compression.
EXPANSION
The expansion valve lowers the pressure of the
refrigerant liquid so that it can easily vaporize.
The process of lowering the pressure to encourage
vaporization before the liquefied refrigerant is sent
to the evaporator is called expansion. In addition,
the expansion valve controls the flow rate of the
refrigerant liquid while decreasing the pressure.
That is, the quantity of refrigerant liquid vaporized
inside the evaporator is determined by the quantity
of heat which must be removed at a prescribed
vaporization temperature. It is important that the
quantity of refrigerant be controlled to exactly the
right value.
COMPRESSOR
The compressor performs two main functions:
It compresses low-pressure and low-temperature
refrigerant vapor from the evaporator into high-
pressure and high-temperature refrigerant vapor to
the condenser. And it pumps refrigerant and
refrigerant oil through the A/C system.
6VD1/6VE1 engine on RHD model is equipped with
an invariable capacity five-vane rotary compressor
(DKV-14D Type).
The compressor sucks and compresses refrigerant
by the rotation of the vane installed to the shaft,
and always discharges a fixed amount of refrigerant
independent of the load of refrigerant.
The thermo sensor is installed to the front head of
the compressor to protect it by stopping its
operation when the refrigerant gas is insufficient or
when the temperature is abnormally high.
·OFF ....... 160 ±5¡C (320.0 ±41¡F)
·ON ........ 135 ±5¡C (275.0 ±41¡F)
Diesel Engine models and 6VD1/6VE1 engine on
LHD model are equipped with a swash plate type
compressor
Swash plate compressors have a swash (slanted)
plate mounted on the shaft. When the shaft turns,
the rotation of the swash plate is converted to
reciprocating piston motion which sucks in and
compresses the refrigerant gas.
Shaft seal (Lip type) is installed between the valve
plate and shaft & cylinder head to prevent
refrigerant gas leaks. A specified amount of
compressor oil is contained in the oil pan.
This oil is supplied to the cylinders, bearings, etc.,
by an oil pump which is connected to the swash
plate shaft.

AIR CONDITIONING 1B Ð 5
With some compressors the differential between
the intake pressure and discharge pressure
generated while the compressor is operating is
used for lubrication instead of an oil pump.
The specified amount of the DKV-14D, DKS-15CH
and HD6 compressors oil is 150cc (4.2 Imp fl oz).
Also, compressor oil to be used varies according to
the compressor model. Be sure to avoid mixing
two or more different types of oil.
If the wrong oil is used, lubrication will be poor and
the compressor will seize or malfunction.
The magnetic clutch connector is a waterproof type.
MAGNETIC CLUTCH
The compressor is driven by the drive belt from the
crank pulley of the engine. If the compressor is
activated each time the engine is started, this
causes too much load to the engine. The magnetic
clutch transmits the power from the engine to the
compressor and activates it when the air
conditioning is ÒONÓ. Also, it cuts off the power
from the engine to the compressor when the air
conditioning is ÒOFFÓ. (Magnetic clutch repair
procedure can be found in Section 1D.)
CONDENSER
The condenser assembly in front of the radiator,
which carry the refrigerant and cooling fins to
provide rapid transfer of heat.
Also, it functions to cool and liquefy the high-
pressure and high-temperature vapor sent from the
compressor by the radiator fan or outside air.
A condenser may malfunction in two ways: it may
leak, or it may be restricted. A condenser restriction
will result in excessive compressor discharge
pressure. If a partial restriction is present, the
refrigerant expands after passing through the
restriction.
Thus, ice or frost may from immediately after the
restriction. If air flow through the condenser or
radiator is blocked, high discharge pressures will
result. During normal condenser operation, the
refrigerant outlet line will be slightly cooler than the
inlet line.
The vehicle is equipped with the condenser of the
parallel flow type condenser. A larger thermal
transmission area on the inner surface of the tube
allows the radiant heat to increase and the
ventilation resistance to decrease.
The refrigerant line connection has a bolt at the
block joint, for easy servicing.
RECEIVER/DRIER
The receiver/drier performs four functions;
·As the quantity of refrigerant circulated varies
depending on the refrigeration cycle conditions,
sufficient refrigerant is stored for the refrigera-
tion cycle to operate smoothly in accordance
with fluctuations in the quantity circulated.
·The liquefied refrigerant from the condenser is
mixed with refrigerant gas containing air
bubbles. If refrigerant containing air bubbles is
sent to the expansion valve, the cooling
capacity will decrease considerably. Therefore,
the liquid and air bubbles are separated and
only the liquid is sent to the expansion valve.
·The receiver/drier utilizes a filter and dryer to
remove the dirt and water mixed in the cycling
refrigerant.
·The sight glass, installed atop the receiver/
drier, show the state of the refrigerant.
A receiver/drier may fail due to a restriction inside
the body of the unit. A restriction at the inlet to the
receiver/drier will cause high pressures.
Outlet restrictions will be indicated by low pressure
and little or no cooling. An excessively cold
receiver/ drier outlet may indicate a restriction.
The receiver/drier of this vehicle is made of
aluminum with a smaller tank. It has 300 cc
(8.5 Imp fl oz) refrigerant capacity.
The refrigerant line connection has a bolt at the
block joint, for easy servicing.
DKV-14D TYPE
DKS-15CH TYPE
HD6 TYPE
Magnetic clutch
CompressorSuction side
Discharge side
Compressor Magnetic clutch
852RW031 871RY00012
871RY00011

COMPRESSOR OVERHAUL 1D Ð 1
CAUTION
When fasteners are removed, always
reinstall them at the same location from
which they were removed. If a fastener
needs to be replaced, use the correct part
number fastener for that application. If the
correct part number fastener is not available,
a fastener of equal size and strength (or
stronger) may be used. Fasteners that are not reused, and those
requiring thread locking compound, will be
called out. The correct torque values must
be used when installing fasteners that
require it. If the above conditions are not
followed, parts or system damage could
result.
SECTION 1D
COMPRESSOR OVERHAUL
CONTENTS
PAGE
General Description.....................................................1DÐ 2
General Information.....................................................1DÐ 4
Compressor Oil.......................................................1DÐ 4
Service Procedures......................................................1DÐ 6
DKV-14D Type Compressor.............................................1DÐ 6
DKS-15CH Type Compressor............................................1DÐ10
HD6 Type Compressor.................................................1DÐ18

COMPRESSOR OVERHAUL 1D Ð 3
solvent, and dried with dry air. Use only lint free
cloths to wipe parts.
The operations described below are based on
bench overhaul with compressor removed from the
car, except as noted. They have been prepared in
order of accessibility of the components. When the
compressor is removed from the car for servicing,
the oil remaining in the compressor should be
discarded and new refrigerant oil added to the
compressor.
Magnetic clutch assembly repair procedures require
that the system be discharged of refrigerant. (Refer
to Section 1B for ÒREFRIGERANT RECOVERYÓ.)
Compressor malfunction will appear in one of four
ways: noise, seizure, leakage or low discharge
pressure. Resonant compressor noises are not
cause for alarm; however, irregular noise or rattles
may indicate broken parts or excessive clearances
due to wear. To check seizure, de-energize the
magnetic clutch and check to see if the drive plate
can be rotated. If rotation is impossible, the
compressor is seized. Low discharge pressure may
be due to a faulty internal seal of the compressor,
or a restriction in the compressor. Low discharge
pressure may also be due to an insufficient
refrigerant charge or a restriction elsewhere in the
system. These possibilities should be checked prior
to servicing the compressor. If the compressor is
inoperative, but is not seized, check to see if current
is being supplied to the magnetic clutch coil
terminals.
The compressor has vanes built into a rotor which
is mounted on a shaft.
When the shaft rotates, the vanes built into the
cylinder block assembly are opened by centrifugal
force.
This changes the volume of the space formed by
the rotor and cylinder, resulting in the intake and
compression of the refrigerant gas. The discharge
valve and the valve stopper, which protects the
discharge valve, are built into the cylinder block
assembly. There is no suction valve but a shaft seal
is installed between the shaft and head; a trigger
valve, which applies back pressure to the vanes, is
installed in the cylinder block and a refrigerant gas
temperature sensor is installed in the front head.
The specified quantity of compressor oil is
contained in the compressor to lubricate the various
parts using the refrigerant gas discharge pressure.
6VD1 engine is equipped with an invariable
capacity five-vane rotary compressor (DKV-14D
Type).
The compressor sucks and compresses refrigerant
by the rotation of the vane installed to the shaft,
and always discharges a fixed amount of refrigerant
independent of the load of refrigerant.The thermo sensor is installed to the front head of
the compressor to protect it by stopping its
operation when the refrigerant gas is insufficient or
when the temperature get abnormally high.
·OFF ..... 160 ±5¡C (320.0 ±9.0¡F)
·ON ..... 135 ±5¡C (275.0 ±9.0¡F)
4JG2 Engine are provided with a swash plate type
compressor (DKS-15CH Type)
Swash plate compressors have a swash (slanted)
plate mounted on the shaft. When the shaft turns,
the rotation of the swash plate is converted to
reciprocating piston motion which sucks in and
compresses the refrigerant gas.
Shaft seal (Lip type) is installed between the valve
plate and shaft & cylinder head to prevent
refrigerant gas leaks. A specified amount of
compressor oil is contained in the oil pan.
This oil is supplied to the cylinders, bearings, etc.,
by an oil pump which is connected to the swash
plate shaft.
With some compressors the differential between
the intake pressure and discharge pressure
generated while the compressor is operating is
used for lubrication instead of an oil pump.
Three pistons are arranged at 120g intervals around
the center of the swash plate shaft. These pistons
are connected to the ends of the swash plate
through shoe disks and balls.
The rotation of the swash plate causes
reciprocating movement of the piston inside the
cylinders, with each piston operating as two
cylinders. Because of that, the compressor operates
as though it has 6 cylinders.
The specified amount of the compressors oil is
150cc (4.2 Imp fl oz).
Also, compressor oil to be used varies according to
the compressor model. Be sure to avoid mixing two
or more different types of oil.
If the wrong oil is used, lubrication will be poor and
the compressor will seize or malfunction.

1D Ð 6 COMPRESSOR OVERHAUL
Legend
(1) Drive Plate Bolt
(2) Drive Plate
(3) Snap Ring(4) Pulley Assembly
(5) Field Coil
(6) Shim(s)
(7) Lead Wire
Removal
1. Remove drive plate bolt by using drive plate holder
J-7624 (1) to prevent the drive plate from rotating.2. Remove drive plate by using drive plate puller
J-33944-A (2) and forcing screw J-33944-4 (1).
SERVICE PROCEDURE
DKV-14D TYPE COMPRESSOR
1
2
3
4
5
67
871RX012
1
901RX055
1
2
871RX016

1D Ð 10 COMPRESSOR OVERHAUL
Legend
(1) Drive Plate Bolt
(2) Drive Plate
(3) Shim
(4) Snap Ring
(5) Pulley Assembly
(6) Screw
(7) Field Coil
(8) Through Bolt
(9) Shaft Seal Assembly
(10) Gasket
(11) Front Cylinder Head(12) O-Ring
(13) Gasket
(14) Front Valve Plate
(15) Front Suction Valve
(16) Pin
(17) Cylinder and Shaft Assembly
(18) Rear Valve Plate
(19) Gasket
(20) Rear Cylinder Head
(21) Bolt
(22) Oil Drain Plug
(23) O-Ring
DKS-15CH TYPE COMPRESSOR
16
23 2122 6
7
45
321 ('98)
('99~)
67
45
321
8
910111213141516
17
1518191220
871RY00015

SERVICE INFORMATION 00 – 11
MAIN DATA AND SPECIFICATIONS
FRONT END ALIGNMENT
Caster 2° 10' ± 45'
Camber 0° ± 30'
King pin inclination 12° 30' ± 30'
Toe-in mm (in) 0 ± 2 (0 ± 0.08)
Max. steering angle (inside) 34°+0°
(outside) 32°
+0°
–2°
POWER STEERING
Steering gear
Type Integral, ball screw
Gear ratio 16.3 : 1
Oil pump
Type Vane
Operating fluid ATF DEXRON
®- ˜E or™

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