piston SUZUKI JIMNY 2005 3.G Service Workshop Manual

Downloaded from www.Manualslib.com manuals search engine AIR CONDITIONING (OPTIONAL) 1B-7
Abnormal Noise Diagnosis
There are various types of noise, ranging from those produced in the engine compartment to those from the
passenger compartment, also from rumbling noises to whistling noises.
Abnormal noise from compressor
Abnormal noise from magnetic clutch
Abnormal noise from tubing
Abnormal noise from condenser
Condition Possible Cause Correction
During compressor
operation, a rumbling
noise is heard propor-
tional to engine revo-
lutions.Inadequate clearance in piston area (piston or
swash-plate).Repair or replace compressor as
necessary
A loud noise is heard
at a certain rpm, dis-
proportionately to
engine revolution.Loose or faulty compressor drive belt. Adjust drive belt tension, or replace
belt.
Loose compressor mounting bolts. Retighten mounting bolts.
A loud rattle is heard
at low engine rpm.Loose compressor clutch plate bolt. Retighten clutch plate bolt.
Replace compressor if it was oper-
ated in this condition for a long
time.
Condition Possible Cause Correction
A rumbling noise is
heard when compres-
sor is not operating.Worn or damaged bearings. Replace magnet clutch assembly.
A chattering noise is
heard when compres-
sor is engaged.Faulty clutch clearance (excessive). Adjust clutch clearance.
Worn clutch friction surface. Replace magnet clutch assembly.
Compressor oil leaked from lip type seal. Replace lip type seal.
Contaminating the friction surface. Replace compressor body assem-
bly.
Condition Possible Cause Correction
A droning noise is
heard inside vehicle,
but not particularly
noticeable in engine
compartment.Faulty tubing clamps. Reposition clamps or increase the
number of clamps.
Resonance caused by pulsation from variations
in refrigerant pressure.Attach a silencer to tubing, or mod-
ify its position and length.
Condition Possible Cause Correction
Considerable vibra-
tion in condenser.Resonance from condenser bracket and body. Firmly insert a silencer between
condenser bracket and body.

Downloaded from www.Manualslib.com manuals search engine 3D-6 FRONT SUSPENSION
OPERATION
2WD
→ 4WD
When the transfer shift control lever is shifted from the 2WD (2H) position to the 4WD (4H or 4L) position, a 4WD
“ON” signal is transmitted to the 4WD controller which then activates VSV2 to apply vacuum in the intake mani-
fold to the chamber “B” in the hub housing.
When vacuum is applied, the slide gear is separated from the magnet, moves toward the center of the vehicle
body and gets engaged with the outer gear. In this way, the front axle shaft and the front wheel hub rotate as one
unit.
If vacuum in the circuit fails to reach 260 mmHg within 15 seconds after operation of VSV2 due to such trouble
as a hole in the vacuum pipe, the slide gear does not operate and the 4WD indicator light flashes to warn that
the hub is unlocked.
1. ECM 8. Engine speed signal 15. Chamber B 22. Slide gear
2. 4WD controller 9. Intake manifold 16. Piston A 23. Wheel hub
3. 4WD indicator lamp 10. Check valve 17. Magnet 24. Spindle
4.4WD switch 11. Vacuum tank 18. Housing 25. Front axle shaft
5. A/C switch (if equipped) 12. VSV1 19. Spring 26. To opposite side
6. Vacuum switch 13. VSV2 20. Diaphragm 27. A/C controller
7. A/C cut signal (if equipped) 14. Outer gear 21. Sleeve A: Vacuum circuit

Downloaded from www.Manualslib.com manuals search engine FRONT SUSPENSION 3D-7
4WD
→ 2WD
When the transfer shift control lever is shifted from the 4WD (4H or 4L) to the 2WD (2H) position, the 4WD con-
troller activates VSV1 and the intake manifold vacuum is applied to the chamber “A” in the hub housing. As the
slide gear is shifted to the wheel side by the vacuum force and disengaged from the outer gear, rotation of the
front wheel hub is not transmitted to the front axle shaft.
1. EPI & A/C controller 8. Engine speed signal 15. Chamber A 22. Slide gear
2. 4WD controller 9. Intake manifold 16. Piston A 23. Wheel hub
3. 4WD indicator lamp 10. Check valve 17. Magnet 24. Spindle
4.4WD switch 11. Vacuum tank 18. Housing 25. Front axle shaft
5. A/C switch (if equipped) 12. VSV1 19. Spring 26. To opposite side
6. Vacuum switch 13. VSV2 20. Diaphragm 27. A/C controller
7. A/C cut signal (if equipped) 14. Outer gear 21. Sleeve A: Vacuum circuit

Downloaded from www.Manualslib.com manuals search engine 5-4 BRAKES
Diagnosis
Road Testing Brakes
Brakes should be tested on dry, clean, smooth and reasonably level roadway which is not crowned. Road test
brakes by making brake applications with both light and heavy pedal forces at various speeds to determine if the
vehicle stops evenly and effectively.
Also drive vehicle to see if it leads to one side or the other without brake application. If it does, check the tire
pressure, front end alignment and front suspension attachments for looseness. See diagnosis table for other
causes.
Brake Fluid Leaks
Check the master cylinder fluid levels. While a slight drop in reservoir level does result from normal lining wear,
an abnormally low level indicates a leak in the system. In such a case, check the entire brake system for leak-
age. If even a slight evidence of leakage is noted, the cause should be corrected or defective parts should be
replaced.
If fluid level is lower than the minimum level of reservoir, refilling is necessary. Fill reservoir with specified brake
fluid.
Brake fluid: Refer to reservoir tank cap.
Substandard or Contaminated Brake Fluid
Improper brake fluid, mineral oil or water in the fluid may cause the brake fluid to boil or the rubber components
in the hydraulic system to deteriorate.
If primary piston cups are swollen, then rubber parts have deteriorated. This deterioration may also be evi-
denced by swollen wheel cylinder piston cups on the drum brake wheels.
If deterioration of rubber is evident, disassemble all hydraulic parts and wash with alcohol. Dry these parts with
compressed air before assembly to keep alcohol out of the system. Replace all rubber parts in the system,
including hoses. Also, when working on the brake mechanisms, check for fluid on the linings. If excessive fluid is
found, replace the linings.
If master cylinder piston seals are satisfactory, check for leakage or excessive heat conditions. If condition is not
found, drain fluid, flush with brake fluid, refill and bleed the system.
The system must be flushed if there is any doubt as to the grade of fluid in the system or if fluid has been used
which contained parts that have been subjected to contaminated fluid.CAUTION:
Since brake system of this vehicle is factory-filled with brake fluid indicated on reservoir tank cap, do
not use or mix different type of fluid when refilling; otherwise serious damage will occur.
Do not use old or used brake fluid, or any fluid from a unsealed container.

Downloaded from www.Manualslib.com manuals search engine BRAKES 5-5
Diagnosis Table
Condition Possible Cause Correction
Not enough braking
forceBrake oil leakage from brake lines Locate leaking point and repair.
Brake disc or pads stained with oil Clean or replace.
Overheated brakes Determine cause and repair.
Poor contact of shoes on brake drum Repair for proper contact.
Brake shoes linings stained with oil or wet with
waterReplace.
Badly worn brake shoe linings Replace.
Defective wheel cylinders Repair or replace.
Malfunctioning caliper assembly Repair or replace.
Air in system Bleed system.
Maladjusted sensor spring length of LSPV Check or adjust.
Broken sensor spring of LSPV Replace.
Defective collar of LSPV Replace.
Malfunctioning ABS (Antilock brake system), if
equippedCheck system and replace as nec-
essary.
Brake pull (Brakes not
working in unison)Pad or shoe linings are wet with water or
stained with oil in some brakesReplace.
Drum-to-shoe clearance out of adjustment in
some brakes (Malfunctioning auto adjusting
mechanism)Check for inoperative auto adjusting
mechanism.
Drum is out of round in some brakes Replace.
Wheel tires are inflated unequally Inflate equally.
Malfunctioning wheel cylinders Repair or replace.
Disturbed front wheel alignment Adjust as prescribed.
Unmatched tires on same axle Tires with approximately the same
amount of tread should be used on
the same axle.
Restricted brake tubes or hoses Check for soft hoses and damaged
lines.
Replace with new hoses and new
double-walled steel brake tubing.
Malfunctioning caliper assembly Check for stuck or sluggish pistons
and proper lubrication of caliper
slide bush.
Loose suspension parts Caliper should slide.
Check all suspension mountings.
Loose calipers Check and torque bolts to specifica-
tions.
Noise (high pitched
squeak without brake
applied)Front lining worn out Replace brake pads.
Rear brake locked pre-
maturelyMaladjusted sensor spring length of LSPV Check or adjust.
Malfunctioning LSPV assembly Replace assembly.
Brake locked
(For vehicles
equipped with ABS)Malfunctioning ABS, if equipped Check system and replace as nec-
essary.

Downloaded from www.Manualslib.com manuals search engine 5-6 BRAKES
Excessive pedal travel
(Pedal stroke too
large)Partial brake system failure Check brake systems and repair as
necessary.
Insufficient fluid in master cylinder reservoirs Fill reservoirs with approved brake
fluid.
Check for leaks and air in brake
systems.
Check warning light. Bleed system
if required.
Air in system (pedal soft/spongy) Bleed system.
Rear brake system not adjusted (malfunctioning
auto adjusting mechanism)Repair auto adjusting mechanism.
Adjust rear brakes.
Bent brake shoes Replace brake shoes.
Worn rear brake shoes Replace brake shoes.
Dragging brakes (A
very light drag is
present in all disc
brakes immediately
after pedal is released)Master cylinder pistons not returning correctly Repair master cylinder.
Restricted brake tubes or hoses Check for soft hoses or damaged
tubes and replace with new hoses
and/or new brake tubes.
Incorrect parking brake adjustment on rear
brakesCheck and adjust to correct specifi-
cations.
Weakened or broken return springs in the brake Replace.
Sluggish parking-brake cables or linkage Repair or replace.
Wheel cylinder or caliper piston sticking Repair as necessary.
Malfunctioning ABS, if equipped with ABS Check system and replace as nec-
essary.
Pedal pulsation (Pedal
pulsates when
depressed for brak-
ing.) Damaged or loose wheel bearings Replace wheel bearings.
Distorted steering knuckle or rear axle shafts Replace knuckle or rear axle shaft.
Excessive disc lateral runout Check per instructions. If not within
specifications, replace or machine
the disc.
Parallelism not within specifications Check per instructions. If not with
specifications, replace or machine
the disc.
Rear drums out of round. Check runout.
Repair or replace drum as neces-
sary.
Braking noise
Glazed shoe linings, or foreign matters stuck to
liningsRepair or replace brake shoe.
Worn or distorted shoe linings Replace brake shoe (or pad).
Loose front wheel bearings Replace wheel bearing.
Distorted backing plates or loose mounting
boltsReplace or retighten securing bolts.
Brake warning light
turns on after engine
startParking brake applied Release parking brake and check
that brake warning light turns off.
Insufficient amount of brake fluid Add brake fluid.
Brake fluid leaking from brake line Investigate leaky point, correct it
and add brake fluid.
Brake warning light circuit faulty Repair circuit. Condition Possible Cause Correction

Downloaded from www.Manualslib.com manuals search engine BRAKES 5-19
PIPE
Inspect the tube for damage, cracks, dents and corrosion. If any
defect is found, replace it.
Front Disc Brake
1. Caliper pin bolt 10. Carrier bolt
2. Boot11. Brake caliper carrier
3. Cylinder slide bush
: Apply rubber grease to mating surface of caliper12. Pad clip
4. Bleeder plug cap 13. Disc brake caliper
5. Bleeder plug 14. Disc brake pad
6. Anti noise shim 15. Piston seal
: Apply brake fluid to all around part of piston seal
7. Disc brake piston
: Apply brake fluid to contact surface of cylinderTightening torque
8. Cylinder bootDo not reuse.
9. Seat ring (boot ring)

Downloaded from www.Manualslib.com manuals search engine 5-22 BRAKES
Caliper assembly
REMOVAL
1) Hoist vehicle and remove wheel.
2) Remove brake flexible hose mounting bolt from caliper. As
this will allow fluid to flow out of hose, have a container ready
beforehand.
3) Remove caliper pin bolts.
4) Remove caliper from carrier.
DISASSEMBLY
1) Before disassembly, clean all around caliper with brake fluid.
2) Remove piston set ring (1) and boot from caliper, pry off with
a flat-bladed tool. Be careful not to damage boot.
3) Blow compressed air into cylinder through bolt hole where
flexible hose was fitted. With this air pressure, piston can be
pushed out of cylinder.
4) Remove piston seal using a thin blade like a thickness
gauge, etc.
5) Remove bleeder plug and cap from caliper.
WARNING:
Do not apply too highly compressed air which will cause
piston to jump out of cylinder. Place a cloth (1) to prevent
piston from damage. It should be taken out gradually
with moderately compressed air. Do not place your fin-
gers in front of piston when using compressed air.
NOTE:
Be careful not to damage inside (bore side) of cylinder.

Downloaded from www.Manualslib.com manuals search engine BRAKES 5-23
INSPECTION
Cylinder Slide Bush
Check slide bush for smooth movement as shown.
If it is found faulty, correct or replace. Apply rubber grease to bush
outer surface. Rubber grease should be the one whose viscosity
is less affected by such low temperature as – 40 °C (– 40 °F).
Bush Dust Boot and Cylinder Boot
Check boots for breakage, crack and damage. If defective,
replace.
Piston Seal
Excessive or uneven wear of pad lining may indicate unsmooth
return of the piston. In such a case, replace rubber seal.
1. Apply rubber grease

Downloaded from www.Manualslib.com manuals search engine 5-24 BRAKES
ASSEMBLY
1) Check that slide bushes and boots for wear, corrosion, dam-
age, movement or deterioration. If it is found faulty, correct or
replace.
Apply rubber grease to bush outer surface. And then make
sure that each bush slides easily through each caliper bolt
hole.
2) Tighten bleeder plug to specified torque and install cap.
Tightening torque
Front caliper bleeder plug
(a) : 11 N·m (1.1 g-m, 8.0 lb-ft)
3) Piston seal is used to seal piston and cylinder and to adjust
clearance between pad and disc. Replace with a new one at
every overhaul. Fit piston seal into groove in cylinder taking
care not to twist it.
4) Before inserting piston (2) into cylinder, install new boot (1)
onto piston (2) as shown.
“A” : 2-grooved side directed inside
“B” : 3-grooved side directed outside CAUTION:
Wash each part cleanly before installation in the same
fluid as the one used in master cylinder reservoir.
Never use other fluid or thinner.
Before installing piston and piston seal to cylinder,
apply fluid to them.
After reassembling brake lines, bleed air from them.
NOTE:
Where temperature gets as low as – 30 °C (– 22 °F) in cold
weather, use rubber grease whose viscosity varies very
little even at – 40 °C (– 40 °F).
1. Apply rubber grease