suspension ISUZU TF SERIES 2004 Workshop Manual

3D-8 REAR SUSPENSION

Installation
1. Install the bump rubber (15) and bolt and tighten it to the
specified torque.
Torque Nm (kgm/lbft)
42 (4.3/31)
2. Install the leaf spring (14).
 The leaf spring assembly should be installed so that the
built-in rubber bush is toward the front.
 Align the holes of the spring eye and frame bracket.
 Insert the spring pin (13) toward vehicle inner side
through the frame bracket holes and the spring bush
hole.
 Tighten the nut (12) a little and after the vehicle is
lowered, tighten it to the specified torque.
Torque N
m (kg
m/lb
ft)
152 (15.5/112)
RTW340LF000101

 Apply rubber grease to inside and outside of the rubber
bushing.
 Install the rubber bushings (11) into the hole of the
frame side bracket and the spring rear eye.
 Install the shackle pin (10) and shackle plate (9).
 Tighten the nuts (8) a little and after vehicle is lowered,
tighten it to the specified torque.
Torque Nm (kgm/lbft)
98 (10/72)
3. Support the lower clamp (7) under the leaf spring.
4. Apply oil to the thread portion of U bolt (6).
Install the U bolt and seat on the rear axle and insert the U
bolt in the lower clamp holes.
5. Tighten the nut (5) to the specified torque.
Torque Nm (kgm/lbft)
78 (8.0/58)
6. Install the shock absorber (4) and inner washer on the
lower clamp pin and frame side pin.
7. Install the washer and nut (3) on the frame side pin and
tighten the nut to the specified torque.
Torque Nm (kgm/lbft)
39 (4.0/29)
8. Install the washer and nut (2) on the lower clamp pin and
tighten the nut to the specified torque.
Torque Nm (kgm/lbft)
39 (4.0/29)
9. Install the parking brake cable (1) on the leaf spring and
tighten the nut at its bracket.
Torque N
m (kg
m/lb
ft)
7 (0.7/5)

REAR SUSPENSION 3D-9

LEAF SPRING ASSEMBLY

F03L100004

Disassembly
1. Remove the bushing using a bench press and a suitable
metal fitting.



RTW430SH000101

2. Apply a setting mark across the springs before
disassembling the leaf spring assembly.

F03L100006

3. Use a bench press and remove the center bolt.
 Discard center bolt and install a new one.

465R300001

4. Disassemble the leaf spring assembly.


Inspection and Repair
Inspect leaf spring, bush, clips, liners and center spacer for
wear, damage, rust or other abnormal conditions and if
necessary, repair or replace it.

3D-10 REAR SUSPENSION
Reassembly
1. Apply grease to both faces of each leaf spring at
reassembly.
2. Set the leaf springs aligning the setting mark before
disassemble.

F03L100006

3. Assemble the leaf springs using a bench press.
4. Apply grease to the outside of the bushing.
Install a new center bolt and tighten it to the specified
torque.
Torque N
m (kg
m/lb
ft)
29 (3.0/22)
5. Install the bushing using a bench press and a suitable
metal fitting.

REAR SUSPENSION 3D-11
TROUBLESHOOTING
1. BODY INCLINATION

Checkpoint Trouble Cause Countermeasure

ReplaceBushings worn or
disintegrated NG
Mounting brackets
Shock absorbers
ReplaceDefective
Spring brackets and U-bolts
Shackle pins and bushings
Replace
Retighten
Replace
Cracked
Bolt loosened
Worn or disintegrated
Regrease
Replace
Poorly lubricated
Weak or broken
OK OK
OK
NG NG NG NG NG NG
OKSpring

3D-12 REAR SUSPENSION
2. REDUCTION GROUND CLEARANCE

Checkpoint Trouble Cause Countermeasure

Bushings
Leaf springs
Regrease
Replace
Retighten
Replace
Poorly lubricated
Deteriorated or disintegrated
Loosened
Broken
Springs clip bandsReplaceWorn or broken
Continued on the next pageOK
NG NG NG NG NG
OK OK
Condition of load
Wipe off excess greaseOver lubricated NG

REAR SUSPENSION 3D-13
Checkpoint Trouble Cause Countermeasure



Replace

Cracked or damaged


Retighten

Loose

OK
NG
NG
Parts for looseness

Continued from the previous page

3D-14 REAR SUSPENSION
3. SPRING BREAKAGE
Checkpoint Trouble Cause Countermeasure


Replace

Oil leakage

NG

Shock absorber


Replace

Bushing worn


U-bolts


Shackle pins and pivot pins


Replace


Retighten


Retighten


Damaged


Bolts and nuts for loosening


Bolts and nuts for loosening


Replace

Worn or damaged

OK
OK
NG
NG
NG
NG
NG
OK

Condition of loading

Continued on the next page

REAR SUSPENSION 3D-15
Checkpoint Trouble Cause Countermeasure



Center bolts


Replace


Retighten


Replace


Damaged


Loosened


Defective


Spring bushing

Replace


Replace


Worn or disintegrated


Brackets cracked

OK NG
NG
NG
NG
NG
OK
Continued from the previous page

3D-16 REAR SUSPENSION
4. HARSHNESS

Checkpoint Trouble Cause Countermeasure


Bushings in suspension
System


Tire inflation pressure


Retighten or replace


Replace


Adjust


Loosen or broken


Defective


Incorrect


Tires for out of balance

Adjust or replace


Replace tires


Incorrect

Noise does not have any
specific pattern

OK
NG NG NG NG NG
OK OK Road test vehicle(Noise has a
certain pattern)

3E-10 WHEELS AND TIRES

TROUBLESHOOTING
Typical examples of abnormal tire tread wear and major causes :

CAUTION:
Similar wear patterns can be caused by worn suspension parts, misalignment of wheels and tires, and
other suspension related problems.


Spotty wear - wear localized
on shoulder section. In
extreme cases, the tire
becomes polygonal in shape.
Tire or wheel out of
round or distorted.Hub or knuckle out
of round or distorted.Play in hub bearings
or ball joints.Rotating parts out of
balance.
Tread wear one-sided.
Rotating parts out of
balance.Tire or wheel out of
round.Hub or knuckle out
of round or distorted.
Localized tread wear.
Once spotty wear develops in
tread due to hard braking or
abrupt starting, localized wear
tends to be accelerated.