6. STEERING SYSTEM
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(1) Knuckle and king pin
The king pin supporting the knuckle is secured to the knuckle side with the lock pin. Its upper and
lower ends are each installed on the axle boss through each needle bearing.
The thrust bearing is installed between the axle upper boss and the knuckle so that the knuckle rotates
smoothly around the king pin with its load.
The upper and lower needle bearings, and the thrust bearing are lubricated with grease through the
grease ttings located on the upper and lower sides of the king pin.
NEEDLE BEARING
(2) Wheel hub
The wheel hub is installed on the knuckle spindle unit with two taper roller bearings. Its preload is
adjusted with the nut.
Fig. 6.8 Knuckle
KNUCKLE
THRUST BEARING
LOCK PIN
KING PIN
OIL SEAL
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