Isuzu N-Series. Service manual - part 143

3C-20 FRONT SUSPENSION

Inspection and Repair

Make necessary correction or parts replacements if ex-
cessive wear, damage, corrosion or any other abnormal
condition are found through inspection.
Visual Check
Inspect the following parts for excessive wear, damage,
bending, oil leak or any other abnormal conditions.

• Torsion Bar
• End Piece
• Height Control Arm
• Rubber Bushings
• Strut Bar
• Shock Absorber

Ball Joint

• Inspect the ball joint boot for damage or grease

leak.

• Move the ball joint to confirm its normal movement.
• Inspect screw / taper area of ball for flaws.

If any defects are found by the above inspections, re-
place the ball joint with new one.

Upper Ball Joint Replacement

• Remove the ball joint fixing nut (Hex. 63mm).
• Remove the ball joint from the upper link using a

special tool.
Remover: 5-8840-2364-0

• Install the ball joint to the upper link using a bench

press and special tool.
Installer: 5-8840-2365-0

• Tighten nut to specified torque.

Tighten:

• Joint ball nut to 206 N

⋅m (21.0 kg⋅m/152 lb⋅ft)

N3A0389E

N3A0391E

N3A0392E

FRONT SUSPENSION 3C-21

Upper Link Assembly

• Disassemble the upper link assembly.
• Inspect the following parts as shown in the figure

for wear, damage, bending or any other abnormal
conditions.

• Reassemble the upper link assembly.
• Apply multi-purpose with MoS

2

 grease to the ful-

crum pin threads.

• Fill multi-purpose with MoS

2

 grease to bushings.

• Install the fulcrum pin to the upper link and tighten

bushings to specified torque.

Tighten:

• Bushing to 294 N

⋅m (30 kg⋅m/217 lb⋅ft)

• Adjust the fulcrum pin as shown in the figure.

• Install grease fitting to upper link in parallel with up-

per link.

N3A0393E

N3A0394E

N3A0395E

N3A0396E

3C-22 FRONT SUSPENSION

Lower Link Bushing Replacement

• Remove the lower link bushing using a bench

press and special tool.
Remover: 5-8840-2367-0

• Inspect the bushing for wear, damage or any other

abnormal condition.

• Install the bushing to the lower link from vehicle for-

ward direction.
Installer: 5-8840-2367-0

Installation

1. Lower Link

• Install the lower link fixing bolt from the vehicle

forward direction and set the bolt head to the
bolt stopper completely.

• Tighten the nut temporarily.

Notice:
Tighten nuts to specified torque after following steps;

• Park the vehicle on a level ground.

• Move the front of the vehicle up and down several

times to settle the suspension.

Tighten:

• Lower link nut to 579 N

⋅m (59.0 kg⋅m/427 lb⋅ft)

2. Shim
3. Upper Link Assembly

• Install the shims and upper link assembly.
• Tighten the fixing bolts to the specified torque.

Thickness of Shims Available
0.8 mm (0.031 in), 1.6 mm (0.063 in), 3.2 mm (0.126 in)

Tighten:

• Upper link bolt to 152 N

⋅m (15.5 kg⋅m/112 lb⋅ft)

For adjustment of camber and caster angle, refer
to “Front End Alignment” in Section 3A.

4. Knuckle

• Connect the upper ball joint, lower ball joint to

the knuckle.

• Tighten the fixing nuts temporarily.
• After installation of tie rod end and strut bar as-

sembly, tighten fixing nuts to specified torque,
with just enough additional torque to align cot-
ter pin holes.
Install new cotter pin.

N3A0397E

N3A0398E

N3A0399E

FRONT SUSPENSION 3C-23

Tighten:

• Ball joint nut to 

Upper: 205 N

⋅m (20.9 kg⋅m/151 lb⋅ft)

Lower: 377 N

⋅m (38.4 kg⋅m/278 lb⋅ft)

5. Shock Absorber Assembly

Tighten:

• Shock absorber bolt and nut to 

Double nut (upper): 40 N

⋅m (4.1 kg⋅m/30 lb⋅ft)

Double nut (lower): 21 N

⋅m (2.1 kg⋅m/16 lb⋅ft)

Lower: 103 N

⋅m (10.5 kg⋅m/76 lb⋅ft)

6. Strut Bar Assembly

• Install the strut bar assembly.
• White paint (1) is aligned to right side strut bar.

Be careful not to install to the opposite side.

• Apply a thin coat of rubber grease to inside of

the rubber bushing (2).

• Tighten the rear side fixing nuts temporarily.

• Tighten the lower link side fixing bolts to speci-

fied torque.

Tighten:

• Strut bar bolt and nut to 219 N

⋅m (22.3 kg⋅m/161 lb⋅ft)

N3A0400E

N3A0401E

N3A0402E

N3A0403E