Isuzu KB P190. Manual — part 86

3C-24 FRONT SUSPENSION

Upper Ball Joint

Upper Ball Joint and Associated Parts

RTW340LF001101

Legend

(1) Upper Ball Joint Bolt

(2) Upper Ball Joint

(3) Upper Ball Joint Nut

(4) Nut and Cotter Pin

(5) Link Nut

Removal

1. Raise the vehicle and support the frame with

suitable safety stands.

2. Remove wheel and tire assembly. Refer to wheel

in this section.

3. Remove link nut.

4. Remove upper ball joint nut and cotter pin, then

use remover 5-8840-2017-0 to remove the upper

ball joint from the knuckle.

CAUTION: Be careful not to damage the ball joint
boot and brake hose.

FRONT SUSPENSION 3C-25

P1010005

5. Remove upper ball joint bolt and nut.

6. Remove upper ball joint.

Inspection and Repair

Make necessary parts replacement if wear, damage,
corrosion or any other abnormal conditions are found
during inspection.

• Inspect the lower end of the boot for damage or

grease leaks. Move the ball joint as shown in the

figure to confirm its normal movement.

• Inspect screw/taper area of ball for damage.
• If any defects are found by the above inspections,

replace the ball joint assembly with new one.

450R300030

• After moving the ball joint 4 or 5 times, attach nut

then measure the preload.

Starting torque: 1.3-3.2 N

⋅⋅⋅⋅m (0.13-0.33 kgf⋅⋅⋅⋅m/0.9-

2.4 lb

⋅ft)

450RS024

If the above limits specified are exceeded, replace the
ball joint assembly.

Installation

1. Install upper ball joint.

2. Install upper ball joint bolt and nut, and then tighten

them to the specified torque.

Torque: 31 N

⋅⋅⋅⋅m (3.2 kgf⋅⋅⋅⋅m/23 lb⋅ft)

3. Install nut and cotter pin then tighten the nut to the

specified torque with just enough additional torque

to align cotter pin holes. Install new cotter pin.

Torque: 98 N

⋅⋅⋅⋅m (10.0 kgf⋅⋅⋅⋅m/72 lb⋅ft)

4. Install link nut, then tighten to the specified torque.

Torque: 50 N

⋅⋅⋅⋅m (5.1 kgf⋅⋅⋅⋅m/37 lb⋅ft)

3C-26 FRONT SUSPENSION

Lower Ball Joint

Lower Ball Joint and Associated Parts

RTW340LF002201

Legend

(1) Lower Ball Joint

(2) Nut and Cotter Pin

(3) Lower Ball Joint Nut

(4) Link Nut

(5) Lower Ball Joint Bolt

Removal

1. Raise the vehicle and support the frame with

suitable safety stands.

2. Remove wheel and tire assembly. Refer to Wheel

in this section.

3. Remove the link nut.

4. Support lower control arm with a jack.

5. Remove lower ball joint nut and cotter pin, then

use remover 5-8840-2017-0 to remove the lower

ball joint from the knuckle.

FRONT SUSPENSION 3C-27

CAUTION: Be careful not to damage the ball joint
boot.

P1010003

6. Remove lower ball joint nut.

7. Remove lower ball joint bolt.

8. Remove lower ball joint.

Inspection and Repair

Make necessary parts replacement if wear, damage,
corrosion or any other abnormal condition is found
during inspection.

• Inspect the lower end of the boot for damage or

grease leaks. Move the ball joint as shown in the

figure to confirm its normal movement.

• Inspect screw/taper area of ball for damage.
• If any defects are found by the above inspections,

replace the ball joint assembly with new one.

450RS026

• After moving the ball joint 4 or 5 times, attach nut

then measure the preload.

Starting torque: 2.5-6.4 N

⋅⋅⋅⋅m (0.26-0.65 kgf⋅⋅⋅⋅m/1.9-

4.7 lb

⋅ft)

450RS024

• If the above limits specified are exceeded, replace

the ball joint assembly.

Installation

1. Install lower ball joint.

2. Install lower ball joint bolt.

3. Install lower ball joint nut and tighten it to the

specified torque.

Torque: 127 N

⋅⋅⋅⋅m (13.0 kgf⋅⋅⋅⋅m/94 lb⋅ft)

4. Install ball joint nut, then tighten it to the specified

torque with just enough additional torque to align

cotter pin holes. Install new cotter pin.

Torque: 147 N

⋅⋅⋅⋅m (15.0 kgf⋅⋅⋅⋅m/108 lb⋅ft)

5. Install link nut, then tighten to the specified torque.

Torque: 50 N

⋅⋅⋅⋅m (5.1 kgf⋅⋅⋅⋅m/37 lb⋅ft)