Isuzu N-Series. Manual — part 130
MANUAL STEERING 3B2-5
3. Steering Unit
4. Unit Fixing Nut and Bolt
Tighten:
Nut and bolt to 103 N
⋅m (10.5 kg⋅m/76 lb⋅ft)
5. Universal Joint
Install the parts by aligning setting marks (1) ap-
plied at removal.
Tighten:
• Universal joint bolt to
M8 bolt: 25 N
⋅m (2.5 kg⋅m/18 lb⋅ft)
6. Drag Link
7. Nut
8. Cotter Pin
1) Install the drag link to the pitman arm and the
knuckle arm.
2) Tighten nuts to specified torque, with just
enough additional torque to align cotter pin
holes.
Install new cotter pin.
Tighten:
• Nut to 167 N
⋅m (17 kg⋅m/123 lb⋅ft)
9. Install the bumper assembly. (Non-Tilt Cab Model)
Tighten:
• Bumper bolt to 40 N
⋅m (4.1 kg⋅m /30 lb⋅ft)
10. Install the under panel. (Non-Tilt Cab Model)
11. Install the head light assembly, front grille and front
combination light assembly. (for Non-Tilt Cab Mod-
el)
Refer to “Headlight Replacement”.
Notice:
After installation, adjust head light aiming. Refer to “Cab
and Chassis Electrical” in Section 8. (Non-Tilt Cab Mod-
el)
N3A0128E
N3A0124E
3B2-6 MANUAL STEERING
UNIT REPAIR
Manual Steering Unit (NHR, NKR)
Disassembly
1. Lock Nut
2. Side Cover
1) Turn the adjuster screw (1) counterclockwise
slightly, then remove the side cover fixing bolt.
(Arrowed in the illustration.)
2) Turn the adjuster screw clockwise with the side
cover held from turning.
Legend
1. Lock nut
9. Oil seal
2. Side cover
10. Lock nut
3. Gasket
11. End cover
4. Adjuster screw
12. Ball nut and worm shaft
5. Adjuster shim
13. Oil seal
6. Needle bearing
14. Bearing
7. Sector shaft
15. Bearing
8. Needle bearing
16. Gear box
N3A0261E
MANUAL STEERING 3B2-7
3. Gasket
4. Adjuster Screw
5. Adjuster Shim
6. Needle Bearing
7. Sector Shaft
When removing, be careful not to damage the ser-
rations, threads and oil seal.
8. Needle Bearing
9. Oil Seal
10. Lock Nut
Steering Lock Nut Wrench : 5-8840-2052-0
11. End Cover
1) Wrench : 5-8840-2053-0
2) When removing, be careful not to damage the
oil seal.
Taping the splines will provide some protection.
N3A0262E
N3A0263E
N3A0264E
N3A0265E
3B2-8 MANUAL STEERING
12. Ball Nut and Worm Shaft
Always keep ball nut assembly in a horizontal po-
sition and avoid holding it vertically, or ball nut will
slide out.
13. Oil Seal
14. Bearing
15. Bearing
16. Gear Box
Inspection and Repair
Make necessary correction or parts replacement if wear
damage, or any other abnormal conditions are found
through inspection.
Visual Check
Inspect the following parts for wear, damage or other ab-
normal conditions.
• Bearing
• Sector shaft
• Ball nut and worm shaft
Ball Nut Rotation
Hold the worm shaft vertically and see if the ball nut low-
ers with turning motion smoothly. If lowering of the ball
nut with its own weight is unsmooth, check the worm
shaft for bending and ball-groove for burrs, dents and
presence of foreign matter.
Notice:
When making a test on the ball nut assembly, exercise
care so as not to strike ball nut against end of worm
shaft, or damage to the ball tubes will result.
If any of the parts in the ball nut and worm shaft assem-
bly is found to be defective, the entire parts should be re-
placed using a new worm shaft assembly.
As these parts are of selective combination and are
sealed to prohibit disassembly, the faulty parts should
not be replaced individually.
Sector Shaft Outside Diameter
Standard : 34.925 mm (1.375 in)
Limit : 34.825 mm (1.371 in)
N3A0266E
N3A0267E
N3A0205E
N3A0289E
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