oil MITSUBISHI MONTERO 1989 1.G Workshop Manual

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8 INTRODUCTION AND MASTER TROUBLESHOOTING - Precautions Before Service
PRECAUTIONS BEFORE SERVICE
PROTECTING THE VEHICLE
WmoAAK
If there is a likelihood of damaging painted or interior parts
during service operations, protect them with suitable covers
(such as seat covers. fender covers, etc.).
REMOVAL AND DISASSEMBLY
When checking a malfunction. find the cause of the problem.
If it is determined that removal and/or disassembly is neces-
s&y, perform the work by following the procedures contained
in this Workshop Manual.
If punch marks or mating marks are made to avoid error in
assembly and facilitate the assembly work, be sure to make
them in locations which will have no detrimental effect on
performance and/or appearances.
If an area having many parts, similar parts, and/or parts which
are symmetrical right and left is disassembled, be sure to
arrange the parts so that they do not become mixed during the
assembly process.
I. Arrange the parts removed in the proper order.
2. Determine which parts are to be reused and which are to
be replaced.
3. If bolts, nuts, etc., are to be replaced, be sure to use only
the exact size specified.
SPECIAL TOOLS
If other tools are substituted for the special tools to do service
or repair work, there is the danger that vehicle parts might be
damaged, or the mechanic might be injured; therefore, be
sure to use the special tool whenever doing any work for
which the use of one is specified.
PARTS TO BE REPLACED
If any of the following parts are removed, they must be
replaced with new parts.
I. Oil seals
2. Gaskets (except rocker cover gasket)
3. Packings
4. O-rings
5. Lock washers
6. Cotter pins
7. Self-locking nuts

12 INTRODUCTION AND MASTER TROUBLESHOOTING - Precautions Before Service
Nominal
size
0.3 mm2
0.5 mm2
0.85 mm*
1.25 mm2
2.0 mm*
3.0 mm2
5.0 mm2 Permissible current
SAE
I
Other
areas
2. If additional optional equipment is to be installed in the
vehicle, follow the procedure listed in the appropriate
instruction manual; however, be sure to pay careful
attention to the following points:
(1) In order to avoid overloading the wiring, take the
electrical current load of the optional equipment into
consideration, and determine the appropriate wire size.
(2) Where possible, route the wiring through the existing
harnesses.
(3) If an ammeter or similar instrument is to be connected
to a live-wire circuit, use tape to protect the wire, use a
clamp to secure the wire, and make sure that there is
no contactwith any other parts.
(4) Be sure to provide a fuse for the load circuit of the
optional equipment.
TUBES AND OTHER RUBBER PARTS
Be careful to avoid spilling any gasoline, oil, etc., or rubber
parts, they might be adversely affected.
LUBRICANTS
In accordance with the instructions in this Service Manual,
apply the specified lubricants in the specified locations during
assembly and installation.
BRAKE FLUID
Be careful to avoid spilling any brake fluid on painted
surfaces, because the paint coat might be discolored or
damaged.

16 Treatment Before I INTRODUCTION AND MASTERTROUBLESHOOTING - AftertheFordingofaStream
INSPECTION AND SERVICE AFTER FORDING A
STREAM
After fording a stream, check the following points. If abnormal
condition is evident, clean, replace or lubricate.
= Check for water. mud. sand. etc. in the rear brake drum.
clutch housing, &tarte; mot&, brake pipe and fuel pipe:
Check for water in the fluid or oil inside the front
differential. rear differential, transmission and transfer
case.
Apply grease to the lubricating points of the front suspen-
sion, steering linkage and propeller shaft.
Check all boots and breather hoses for cracks and
damage.
rTSB Revi

‘p ? f! .., .-, _-_ ,_- ____ ____ _L(
26 INTRODUCTION AND MASTER TROUBLESHOOTlNG - Master Troubleshooting
ENGINE HESITATES OR POOR ACCELERATION
Symptom Probable cause
Engine hesitates or
poor acceleration
-I
Ignition system problem
Vacuum leaks
l Purge control valve hose
l Vacuum hoses
- intake manifold
l Air intake plenum
* Carburetor or throttle body
l EGRvalve
ENGINE DIESELING
Reference
page or remedy
8-147 to 149
Repair as
necessary
Air cleaner clogged
Fuel line clogged 113.10
1442.99
Carburetor or fuel injection system problem
Auxiliary acceleration pump faulty (cold engine)
Emission control system problem
l EGR system always on
- High-altitude compensation (HAC) system problem
Engine overheats 14-34.90
14-23
25-77.22.32
7-4
Compression too low g-II.65
I Symptom Probable cause I
Reference
page or remedy
I I I I -..
Engine dieseling (runs after
ignition switch is turned off) Carburetor problems
Incorrect ignition timing 14-34
8-14710 149
EXCESSIVE OIL CONSUMPTION
Symptom Probable cause Reference
page or remedy
Excessive oil consumption Oil leak
Positive crankcaseventilation line clogged
Valve stem seal worn or damaged
Valve stem worn
Piston ring worn or damaged Repair as
necessary
o-13
Replace
Replace
9-43
1 TSB Revision

INTRODUCTION AND MASTER TROUBLESHOOTING - Master Troubleshooting 27
POOR FUEL MILEAGE
Symptom Probable cause Reference
page or remedy
Poor fuel mileage Fuel leak Repair as
necessary
I
1 Air cleaner clogged
1 Ignition problems 1 11-3.10 1
1 8-147to 149 1
Carburetor or fuel injection system problems 1434.90
I
Compression too low
1 g-II.65 1
Tires improperly inflated 1 22-2
I
Clutch slips
16-4 I
Brakes drag 1 5-13 I
NOISE
Probable cause Reference
page or remedy
Noise Loose bolts and nuts Retighten as
necessary
I
1 Enaine noise
I 9-11 I
HARD STEERING
Symptom
Hard steering Probable cause
Loose power steering oil pump belt
Low fluid level
Air in power steering system
Low tire pressure
Excessive turning resistance of upper or lower ball joint
Excessivelytight linkage ball joint
Improperfrontwheel alignment
Excessive turning resistance of tie-rod ball joint
No lubricantion of tie-rod
Sticky flow control valve
No lubrication of idler arm Reference
page or remedy
19-10
19-11
19-11
22-2
2-27
1937
2-13
19-38 ’
Lubricate
19-33
19-39
) TSB Revision

INTRODUCTION AND MASTER TROUBLESHOOTING - Master Troubleshootina 29
VEHICLE PULLS TO ONE SIDE
Symptom
Vehicle pulls to one side Probable cause
Improper front or rear wheel alignment
lmbalanced or worn tires
Uneven tire pressure
Excessive turning resistance of upper ball joint
Wheel bearing seizure
Broken or worn torsion bar spring
Bend front axle drive shaft
Deformed lowerarm Reference
page or remedy
2-l 3.17-3.6
/ 224
22-2
2-27
2-21
2-36
2-40
230
STEERING WHEEL SHIMMY
Symptom Probable cause Reference
page or remedy
Steering wheel shimmy Improper front or rear wheel alignment 1 2-13,17-3,6 1
Improper tire pressure 1 22-2
I
Imbalanced wheels Repair
I
1 Poorturning resistance of upper ball joint
Excessive play of steering wheel 1 2-27
I
19%
I
Broken or weak stabilizer 1 2-39
I
Worn lower arm or upper arm bushing I 2-28.31 1
Malfunctioning shock absorber I 2-27
I
/ Broken or weak torsion bar spring or, leaf spring or coil spring / 2-36,17-4,9
Wear, play, or seizure of wheel bearing 2-19
BOTTOMING
Symptom Probable cause Reference
page or remedy
Bottoming Overloaded vehicle Correct
Broken or weak torsion bar spring, leaf spring or coil spring 236.1749
1 Malfunctionina shock absorber 1 2-27,174 8 1
( TSB Revision

I”! 1: 1’ --- -~~
30 INTRODUCTION AND MASTER TROUBLESHOOTING
- Master Troubleshooting
WHEEL BEARING TROUBLESHOOTING
Trouble Symptom
Probable cause
Pitting
Flaking
Cracking Chipping or cracking of cage or roller edges
Flat spotting When large load is applied, race and roller contact
surfaces compress, forming indentations
Nicks
?ust, corrosion
Near
Xscoioration Pitting occurs because of uneven rotation of race
and bearing surfaces
The surface peels because of uneven rotation of
the race and bearing surfaces
Instead of rolling along race surface,
rollers slide, thus damaging surface
Damage or wear caused by minute particles
adhering to surfaces results in rough movement
and such high temperatures that parts of surface
melt
Appears on various areas of the bearing
Wear of surface areas caused by friction
Grease discoloration results from grease
deterioration which causes particles of pigment
contained in grease to adhere to surfaces
Heat discoloration will appear as a deep brown or
purple Excessive bearing preload
Excessive load
End of bearing life
Improper bearing assembly
Impact when bearing was
installed (such as being hit
with a hammer)
Excessive bearing preload
Excessive load
Vibration when bearings are
not used, such as during
shipment on freight cars,
transport trucks, etc.
Improper grease
Excessive bearing preload
Excessive load
Faulty oil seal
Excessive variation of loads on
bearings
Use of grease other than that
specified
Improper grease
Use of grease otherthan
that specified
Faulty oil seal
Presence of water or moisture
Improper grease
Foreign matter
Rust or corrosion due to
moisture
Use of grease otherthan that
specified
Faulty oil eal
Use of grease other than
that specified
Faulty oil seal
Excessive bearing preload
Excessive load