TCM FB30-7 - 6. Steering System

6. STEERING SYSTEM
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6. STEERING SYSTEM
Model
FB10-7 FB15-7 FB20-7 FB25-7
FB30-7
FB18-7 FB25-7LB FB25-7V
FB30-7V
Item FB35-7S
Steering system
Type Rear wheel steering, electric power steering
Steering gear
Type Ball nut type
Name PU41
Reduction ratio 18.9
Operating angle 92°
Worm returning angle Left
Handwheel dia. 360 mm [14.2 in.]
Actuator
Type Motor-driven, ball nut type
Rated voltage of motor 48 V
← 72 V
Rated output of motor 350 W 550 W
←
Stroke 235 mm [9.3 in.] ← ←
Controller
Type Voltage controlling type
Rated voltage 48 V
← 72 V
Current limit Max. ±40 A Max. ±45 A
←
Rear axle
Type Elliot type
← ←
Steering angle
(Inner wheel) 85.8° 83.5°
←
(Outer wheel) 55.6° 56.4° ←
King pin spacing 735 mm [28.9 in.] 740 mm [29.1 in.] ←
King pin tilt 0° ← ←
Camber 0° 1° ←
Caster 0 ← ←
Toe-in 0 ← ←
Trail 0 ← ←
Wheel
Tire size 16 x 6 – 8 10PR 18 x 7 – 8 14PR
←
3.5 t: 18 x 7 – 8
Rim size 4.25 x DT
← ←
Ination pressure 850 kPa {8.5 kgf/cm
2
} 900 kPa {9.0 kgf/cm
2
} – * –
[120.9 psi] [128.0 psi]
6.1 GENERAL DESCRIPTION
The steering system consists of a steering gear, actuator, controller, and axle. The steering handwheel
operating force is boosted by the motor-driven actuator.